WO2024245055A1 - Energy conversion apparatus and vehicle - Google Patents

Abstract

An energy conversion apparatus, comprising: a first circuit module (1), a second circuit module (2), a first wire (5), a second wire (6), a third wire (7), and a magnetic ring (3). The second circuit module is at least used for controlling the temperature of the first circuit module to rise; the first wire is a positive wire and the second wire is a negative wire; the third wire, the first wire, the first circuit module, and the second circuit module can form a first loop, and a third wire, a second wire, the first circuit module, and the second circuit module can form a second loop; and the first wire, the second wire, and the third wire are jointly threaded through the magnetic ring. Further provided is a vehicle using the apparatus. The apparatus can suppress high-frequency interference.

Description

Energy conversion device and vehicle

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese patent application number "202310626704.9" filed by BYD Co., Ltd. on May 31, 2023, entitled "A Energy Conversion Device and Vehicle", the entire contents of which are incorporated by reference into this application.

Technical Field

The present application relates to the technical field of electric vehicles, and more particularly to an energy conversion device and an electric vehicle.

Background Art

In the related art, the energy conversion device generally includes multiple switches, and switching between different circuits is achieved by controlling the switches. For example, it includes at least a circuit for charging the energy storage element from the battery pack and a circuit for discharging the energy storage element to heat the battery pack. In this device, the high-frequency opening and closing of the switches leads to relatively serious high-frequency interference.

Summary of the invention

The present application aims to solve one of the technical problems in the related art at least to some extent.

To this end, the present application proposes an energy conversion device, including: a first circuit module, at least for energy storage; a second circuit module, the second circuit module is at least used to control the temperature rise of the first circuit module; a first wire, the first wire is a positive wire; a second wire, the second wire is a negative wire; a third wire, the third wire, the first wire, the first circuit module and the second circuit module can form a first loop, the third wire, the second wire, the first circuit module and the second circuit module can form a second loop; and a magnetic ring, the first wire, the second wire and the third wire are jointly passed through the magnetic ring. The first wire, the second wire and the third wire pass through the magnetic ring at the same time. The second circuit module is a module for heating the first circuit module, and usually includes more high-frequency breaking switches. The third wire is used as a positive wire and a negative wire in different circuits respectively. When it is used as a positive wire, it is in the same circuit with the second wire, and when it is used as a negative wire, it is in the same circuit with the first wire. In this way, no matter what polarity the third wire has, it can suppress high-frequency interference. The magnetic ring can also be used when the first wire and the second wire are in the same circuit and the third wire does not pass current, to prevent high-frequency signals from being transmitted through the first wire and the second wire. In other words, the magnetic ring can at least suppress high-frequency interference in all three circuits.

The present application also relates to a vehicle, which comprises the above-mentioned energy conversion device.

Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a perspective schematic diagram of an electric assembly according to an embodiment of the present application;

FIG2 is a schematic diagram of a circuit principle of a driving system according to an embodiment of the present application;

3 is an exploded schematic diagram of some elements of a controller, a first connecting assembly, and a second connecting assembly of a drive system according to an embodiment of the present application;

FIG4 is a schematic top view of the electric assembly shown in FIG1 , wherein the upper cover of the controller is omitted;

5 is a schematic diagram of the connection between the controller of the drive system and the first connecting component according to an embodiment of the present application;

FIG6 is an exploded perspective schematic diagram of the charging socket shown in FIG3 ;

FIG7 is an exploded perspective schematic diagram of the electric assembly shown in FIG1 ;

FIG8 is a schematic side cross-sectional view of a controller according to an embodiment of the present application;

FIG9 is a schematic diagram showing an example of the composition of the A-line conductive component of the controller shown in FIG3 ;

FIG10 is a schematic diagram showing another example of the composition of the A-line conductive component of the controller shown in FIG3 ;

FIG11 is a side cross-sectional schematic diagram of the first contactor shown in FIG3 ;

FIG12 is a schematic diagram of the composition of the sub-positive electrode conductive component of the controller shown in FIG3;

FIG13 is a schematic diagram of the composition of the sub-negative electrode conductive component of the controller shown in FIG3 ;

FIG14 is a schematic diagram of a capacitor component and a power module of a controller according to an embodiment of the present application;

FIG15 is a top perspective schematic diagram of the capacitor assembly shown in FIG14;

FIG16 is a bottom perspective schematic diagram of the capacitor assembly shown in FIG14;

FIG17 is an exploded perspective schematic diagram of the capacitor assembly shown in FIG14;

FIG18 is a partial enlarged schematic diagram of the connection between the capacitor assembly and the power module shown in FIG14;

FIG19 is an exploded schematic diagram of the connection between the first connecting assembly of the drive system shown in FIG2 and the battery pack;

FIG20 is a schematic diagram according to the present application;

FIG21 is a schematic diagram according to some embodiments of the present application;

FIG22 is another schematic diagram according to some embodiments of the present application;

FIG. 23 is another schematic diagram according to some embodiments of the present application.

DETAILED DESCRIPTION

Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

Hereinafter, embodiments according to the present application will be described in more detail with reference to the accompanying drawings.

As shown in Figure 20, in some embodiments, an energy conversion device includes a first circuit module 1, a second circuit module 2 and a magnetic ring 3; the first circuit module 1 is at least used for energy storage; the second circuit module 2, the second circuit module 2 is at least used to control the temperature increase of the first circuit module 1; the energy conversion device also includes a first wire 5, a second wire 6 and a third wire 7, the first wire 5 is a positive wire, the second wire 6 is a negative wire, the third wire 7, the first wire 5, the first circuit module 1 and the second circuit module 2 can form a first loop, the third wire 7, the second wire 6, the first circuit module 1 and the second circuit module 2 can form a second loop; the first wire 5, the second wire 6 and the third wire 7 are jointly arranged in the magnetic ring 3. When the third wire 7 is used to form the first loop, it serves as a negative wire. When the third wire 7 is used to form the second loop, it serves as a positive wire. That is to say, the third wire 7 switches between the positive wire and the negative wire. The first wire 5, the second wire 6 and the third wire 7 pass through the magnetic ring 3 together, which can reduce high-frequency interference. In this way, whether the third wire 7 is in the first loop or the second loop, high-frequency interference can be reduced. At the same time, when the first wire 5, the second wire 6, the first circuit module 1 and the second circuit module 1 are used as a loop, the magnetic ring can also play a role in suppressing high-frequency interference. In different loops, the same magnetic ring is used to achieve the effect of suppressing high-frequency interference, so that one magnetic ring can play its role in different loops at different times, reduce the use of magnetic rings, save costs, reduce the volume of the energy conversion device, and make the best use of everything.

In some embodiments, as shown in FIG21, the first circuit module 1 includes a first sub-battery pack U1 and a second sub-battery pack U2 arranged in series, the first end of the first wire 5 is connected to the positive electrode of the first sub-battery pack U1, the first end of the second wire 6 is connected to the negative electrode of the second sub-battery pack U2, and the first end of the third wire 7 is connected to the negative electrode of the first sub-battery pack U1 and the positive electrode of the second sub-battery pack U2. In some embodiments, the first circuit module 1 is a battery pack, and the specific structure of the battery pack is shown in FIG19, which will be described in detail later.

As shown in Figure 21, in some embodiments, the first end of the third wire 7 is connected to the middle position of the first sub-battery pack U1 and the second sub-battery pack U2. The middle position in the present application refers to any position between the first sub-battery pack U1 and the second sub-battery pack U2. From the embodiment, it is the position connecting the positive pole of the second sub-battery pack U2 and the negative pole of the first sub-battery pack U1.

As shown in FIG. 21 , in some embodiments, the second circuit module 2 includes a power module 800A and an energy storage device 700A, the power module 800A includes at least one phase bridge arm 800A1, the positive pole of the at least one phase bridge arm 800A1 is connected to the second end of the first wire 5, and the negative pole of the at least one phase bridge arm 800A1 is connected to the second end of the second wire 6; the energy storage device 700A includes at least one inductor 700A1; the first end of the inductor 700A1 is connected to the midpoint of the one-phase bridge arm 800A1, and the second end of the inductor 700A1 is connected to the second end of the third wire 7; the midpoint in the present application does not refer to the exact middle position, but refers to any position in the one-phase bridge arm that connects two power switch tubes.

As shown in FIG. 21 , in some embodiments, the first circuit module 1 further includes a shell 1A, the first sub-battery pack U1 and the second sub-battery pack U2 are disposed in the shell 1A, and the magnetic ring 3 is disposed in the shell 1A. The magnetic ring 3 is disposed in the shell of the battery pack, which is beneficial to improving the EMC performance of the battery pack.

As shown in FIG. 22 , in some embodiments, the first circuit module 1 includes the power module, and the power module includes a three-phase bridge arm; the energy storage device includes three inductors, and the first ends of the three inductors are respectively connected to the midpoints of the three-phase bridge arms, and the second ends of the three inductors are all connected to the second end of the third wire 7. For example, the power module is a part of the controller, such as the controller 800 can be a motor controller; the three inductors can be the three-phase windings of the motor 700, so that the motor and the electric control can be reused, without the need to set up additional power modules and energy storage devices, thereby improving the integration of the energy conversion device.

In some embodiments, as shown in FIGS. 21 and 22 , the second circuit module 2 includes a power module 800A and a box 2A, the power module 800A includes at least one phase bridge arm 800A1, the positive electrode of the at least one phase bridge arm 800A1 is connected to the second end of the first wire 5, and the negative electrode of the at least one phase bridge arm 800A1 is connected to the second end of the second wire 6;

The power module 800A is arranged in the box 2A, and at least part of the third wire 7 is passed through the box 2A. The third wire 7 is routed from the box 2A of the second circuit module, which is convenient for wiring of the third wire 7. The part of the third wire 7 in the box 2A does not need to be insulated and can also be positioned in the box 2A, which is conducive to improving the safety of the energy conversion device and the convenience of wiring.

In some embodiments, as shown in Figure 21, the magnetic ring 3 can also be arranged in the box 2A. When the second circuit module includes a controller, the magnetic ring 3 is arranged in the box of the controller. In this way, the magnetic ring 3 can prevent the high-frequency signal of the switching tube of the power module in the second circuit module 2 from being transmitted outward, thereby improving the EMC of the second circuit module.

In some embodiments, as shown in FIG21 , the second circuit module 2 further includes an energy storage device and a housing, the energy storage device includes at least one inductor 700A1, the first end of the inductor 700A1 is connected to the midpoint of the one-phase bridge arm 800A1, and the second end of the inductor 700A1 is connected to the second end of the third wire 7; the housing is connected to the case, and at the connection between the housing and the case, the third wire 7 is surrounded by at least one of the housing and the case. For example, at the connection between the housing and the case, at least part of the third wire is surrounded by both the housing and the case. When the energy storage device is a motor 700, the housing is the housing 702 of the motor, and when the power module reuses the power module of the controller, the case is the case of the controller. The specific structure is shown in FIG7 . This arrangement allows the third wire 7 to pass through both the controller housing 10 and the motor housing 702, so that the third wire 7 between the motor and the controller will not be exposed to the atmosphere and does not need to be covered, and the connection between the motor and the controller can be more compact. In other words, the third wire 7 in the second circuit module 2 will not be exposed to the outside and does not need to be covered, thereby reducing the covering of the third wire 7.

In some embodiments, as shown in FIG. 23 , the second circuit module includes:

A first energy storage device, wherein a first end of the first energy storage device is connected to the first wire 5, and a second end of the first energy storage device is connected to a second end of the third wire 7;

A second energy storage device, wherein a first end of the second energy storage device is connected to the second wire 6, and a second end of the second energy storage device is connected to a second end of the third wire 7;

A first switch S1, the first switch S1 is used to control the first sub-battery pack U1, the first wire 5, the first energy storage device and the third wire 7 to form a first battery pack discharge circuit, and the first battery pack discharge circuit is used for discharging the first sub-battery pack U1;

A second switch S2, the second switch S2 is used to control the second sub-battery pack U2, the second wire 6, the second energy storage device and the third wire 7 to form a second battery pack discharge circuit, and the second battery pack discharge circuit is used for discharging the second sub-battery pack U2;

A third switch S3, the third switch S3 is used to control the first sub-battery pack U1, the first wire 5, the first energy storage device and the third wire 7 to form a first battery pack charging circuit, and the first battery pack charging circuit is used to charge the first sub-battery pack U1; and

The fourth switch S4 is used to control the second sub-battery pack U2, the second wire 6, the second energy storage device and the third wire 7 to form a second battery pack charging circuit, and the second battery pack charging circuit is used to charge the second sub-battery pack U2.

In some embodiments, as shown in FIG. 23 , the first energy storage device includes a first capacitor C1, and the first sub-battery pack U1, the first wire 5, the first capacitor C1, the first switch S1 and the third wire 7 form the first battery pack discharge circuit; the second energy storage device includes a second capacitor C2, and the second sub-battery pack U2, the second wire 6, the second capacitor C2, the second switch S2 and the third wire 7 form the second battery pack discharge circuit.

In some embodiments, as shown in FIG. 23 , the second circuit module further includes:

A first energy storage inductor L1 and a first diode D1, wherein the first energy storage inductor L1, a fifth switch S5, a first capacitor C1 and the first diode D1 form a first energy transfer loop;

The second energy storage inductor L2 and the second diode D2, the second energy storage inductor L2, the sixth switch S6, the second capacitor C2 and the second diode D2 form a second energy transfer loop.

In some embodiments, as shown in FIG. 23 , the first sub-battery pack U1 , the third wire 7 , the first energy storage inductor L1 , the first diode D1 , the first capacitor C1 and the first wire 5 form the first battery pack charging circuit; the first battery pack charging circuit is used to charge the first sub-battery pack U1 .

The second sub-battery pack U2, the third wire 7, the second energy storage inductor L2, the second diode D2, the second capacitor C2 and the second wire 6 form the second battery pack charging circuit; the second battery pack charging circuit is used to charge the second sub-battery pack U2.

In some embodiments of the present application, during the heating process of the first sub-battery pack U1, in the first stage, the first switch S1, the first sub-battery pack U1, the first wire 5, the first capacitor C1 and the third wire 7 form a first battery pack discharge circuit, and the first battery pack discharge circuit is used to discharge the first sub-battery pack U1. In this stage, S1 is closed, and S3 and S5 are disconnected; in the second stage, the first energy storage inductor L1 and the first diode D1, the first energy storage inductor L1, the fifth switch S5, the first capacitor C1 and the first diode D1 form a first energy transfer circuit, in which the energy in the first capacitor C1 is transferred to the first energy storage inductor L1, in this stage, S5 is closed, and S3 and S1 are disconnected; in the third stage, the first sub-battery pack U1, the third wire 7, the first energy storage inductor L1, the first diode D1, the first capacitor C1, the first wire 5 and the first switch S3 form the first battery pack charging circuit, in which the first energy storage inductor L1 discharges to charge the first sub-battery pack U1, in this stage, S3 is closed, and S5 and S1 are both disconnected.

The heating process of the second sub-battery pack, the first stage: the second switch S2, the second sub-battery pack U2, the second wire 6, the second capacitor C2 and the third wire 7 form a second battery pack discharge circuit, the second battery pack discharge circuit is used for the second sub-battery pack U2 to discharge to charge the second capacitor C2, in this stage, S2 is closed, S4 and S6 are both disconnected; the second stage: the second energy storage inductor L2 and the second diode D2, the second energy storage inductor L2, the sixth switch S6, the second capacitor C2 and the second diode D2 form a second energy transfer circuit, the second energy transfer circuit is used for the second capacitor C2 to transfer energy to the second energy storage inductor L2 In this stage, S6 is closed, and S4 and S2 are both disconnected; in the third stage: the fourth switch S4, the second sub-battery pack U2, the third wire 7, the second energy storage inductor L2, the second diode D2, the second capacitor C2 and the second wire 6 form the second battery pack charging circuit; the second battery pack charging circuit is used to charge the second sub-battery pack U2. In this stage, S4 is closed, and S6 and S2 are both disconnected.

The present application also provides a controller, which can be a part of the second circuit module. The present application also provides an electric assembly using the controller, which can constitute the second circuit module, as well as a drive system using the electric assembly, and a vehicle using the drive system; for example, the drive system can constitute the energy conversion device, and the vehicle includes the drive system.

In some embodiments, the present application also provides a capacitor assembly for a controller, a magnetic ring seat assembly, a controller including the capacitor assembly and/or the magnetic ring seat assembly and at least used to control a motor, an electric assembly including the controller, a drive system including the electric assembly, and a vehicle including the drive system. It can be understood that the vehicle according to the present application is an electric vehicle.

Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings.

As shown in FIG1 , in an embodiment, the electric assembly 870 according to the present application includes a controller 800 and a motor 700 according to a preferred embodiment of the present application. As shown in FIG2 , in an embodiment, the drive system 890 according to the present application includes a battery pack 600 and an electric assembly 870 according to an embodiment of the present application. The controller 800 is connected to a charging device (e.g., an electric gun, a distribution box) through a second connection component 4 (e.g., a line nose), and is connected to the battery pack 600 through a first connection component 9 (e.g., a line nose).

The battery pack 600 is used to store energy and provide power (power battery), and the controller 800 is used to control the motor 700, which is connected to the wheels of the electric vehicle to drive the wheels to rotate. The controller 800 is connected to the motor 700 and the battery pack 600 respectively to transmit the power of the battery pack 600 to the motor 700.

In some embodiments, the controller 800 includes a housing 10. At the same time, the housing 10 is provided with a plurality of openings or sockets (plug interfaces) for connecting with the motor 700, the battery pack 600, and the charging device through connecting wires. For example, the housing 10 is provided with a charging socket 115, and the second connecting component 4 is plugged into the charging socket 115 to connect with the charging device.

In some embodiments, the box body 10 is provided with a first plug interface 810 , and the first plug interface 810 is used to plug in the first connecting component 9 to connect with the charging pack 600 .

The working principle of the drive system 890 is first briefly introduced below in conjunction with FIG. 2 .

The motor 700 includes a three-phase winding 701 (inductor).

The controller 800 includes a power module 83. In some embodiments, the power module 83 includes a three-phase bridge arm 803, and each phase bridge arm includes an upper bridge 804 and a lower bridge 805. Each phase bridge arm 803 includes, for example, two power switch tubes connected in series. In some embodiments, the power switch tube can be an IGBT, and the two power switch tubes form an upper bridge 804 and a lower bridge 805 respectively. The first end of the three-phase winding 701 is connected to the middle of the three-phase bridge arm 803. It should be noted that the middle of the three-phase bridge arm 803 refers to an electrical position located between the two power switches, and the electrical position is connected to the upper bridge 804 and the lower bridge 805 at the same time, for example, the upper bridge 804 is connected along one path direction, and the lower bridge 805 is connected along another path direction. The electrical position is also the connection point of the upper bridge 804 and the lower bridge 805, but not the midpoint position of the three-phase bridge arm 803.

In some embodiments, the battery pack 600 includes a first sub-battery pack and a second sub-battery pack (U1/U2) connected in series, which are respectively denoted as the first sub-battery pack U1 and the second sub-battery pack U2. For example, the battery pack 600 includes a shell, and the first sub-battery pack U1 and the second sub-battery pack U2 are arranged in the shell. The negative electrode of the first sub-battery pack U1 is connected to the positive electrode of the second sub-battery pack U2, and the positive electrode of the first sub-battery pack U1 forms the positive electrode of the battery pack 600, that is, the DC positive electrode of the first sub-battery pack and the second sub-battery pack (the first sub-battery pack U1 and the second sub-battery pack U2) connected in series; the negative electrode of the second sub-battery pack U2 forms the negative electrode of the battery pack 600, that is, the DC negative electrode of the first sub-battery pack and the second sub-battery pack (the first sub-battery pack U1 and the second sub-battery pack U2) connected in series.

The A line 801 is connected between the second end of at least one phase winding 701 and the middle of the first sub-battery pack U1 and the second sub-battery pack U2, that is, the second end of at least one phase winding 701 and the middle of the first sub-battery pack U1 and the second sub-battery pack U2 are connected through the A line 801. In the present application, the A line is a kind of conductive wire, which can be any one or more combinations of round wire, flat wire, cable, copper bus, etc. Similarly, the middle of the first sub-battery pack U1 and the second sub-battery pack U2 refers to an electrical position located between the first sub-battery pack U1 and the second sub-battery pack U2, which simultaneously connects the first sub-battery pack U1 and the second sub-battery pack U2, for example, the first sub-battery pack U1 (for example, the negative pole of U1) is connected along one path direction, and the second sub-battery pack U2 (for example, the positive pole of U2) is connected along another path direction.

In some embodiments, line A 801 is connected between the second end of the three-phase winding 701 and the middle of the first sub-battery pack U1 and the second sub-battery pack U2, that is, the second ends of the three-phase winding 701 are connected to the middle of the first sub-battery pack U1 and the second sub-battery pack U2 connected in series through line A 801.

As can be seen from FIG. 2 , the battery pack 600 includes a first sub-battery pack U1 and a second sub-battery pack U2. In the positive half-cycle of the fundamental wave cycle, when the upper bridge 804 is turned on and the lower bridge 805 is turned off, the first sub-battery pack U1 discharges and charges the three-phase winding 701 through the upper bridge 804; when the lower bridge 805 is turned on and the upper bridge 804 is turned off, the three-phase winding 701 charges the second sub-battery pack U2, and then forms a loop through the lower bridge 805. In the negative half-cycle of the fundamental wave cycle, when the lower bridge 805 is turned on and the upper bridge 804 is turned off, the second sub-battery pack U2 discharges to the three-phase winding 701, and forms a loop through the lower bridge 804; when the upper bridge 804 is turned on and the lower bridge 805 is turned off, the three-phase winding 701 continues to flow and charges the first sub-battery pack U1 through the upper bridge 804. The self-heating of the battery is achieved by charging and discharging the first sub-battery pack and the second sub-battery pack to generate heat in the internal resistance of the battery. Therefore, in the present application, the A line 801 is also referred to as the heating A line, which extends from the second end of the winding 701 of the motor 600 to the first end of the battery pack 600. The middle of the first sub-battery pack U1 and the second sub-battery pack U2.

In some embodiments, the controller 800 further includes a first capacitor 173. The first capacitor 173 can be understood as a bus capacitor, the positive electrode of the first capacitor 173 is connected to the positive DC bus 807, and the negative electrode of the first capacitor 173 is connected to the negative DC bus 808.

In some embodiments, the positive DC bus 807 and the negative DC bus 808 are connected to a first filter together. For example, the first filter may be a magnetic ring 93, which is referred to as a first magnetic ring 93. In order to better install the positive DC bus 807 and the negative DC bus 808, the positive DC bus 807 and the negative DC bus 808 may be passed through the first magnetic ring 93.

In some embodiments, the filter includes a first Y capacitor, a second Y capacitor and a third Y capacitor. Among them, one end of the first Y capacitor is connected to the positive DC bus 807, and the other end of the first Y capacitor is grounded; one end of the second Y capacitor is connected to the negative DC bus 808, and the other end of the second Y capacitor is grounded; one end of the third Y capacitor is connected to the A line 801, and the other end of the third Y capacitor is grounded. These three Y capacitors can be set in the housing 10 of the controller 800, or in the housing of the battery pack 600, or in both places at the same time.

Referring to FIG. 2 , when charging the battery pack 600, the charging device is connected to the controller 800, and the battery pack 600 is charged through the controller 800. When the charging voltage of the charging device is low (e.g., less than 750V, e.g., 470V), after the charging current enters the controller 800, in some embodiments, the negative charging current passes through the negative electrode of the second connecting component 4 and the negative DC bus 808 to the negative electrode of the battery pack 600; the positive charging current passes through the first switching element 122 (e.g., the first contactor), the second A-line conductive member 136, the motor winding 701, the upper bridge 804 of the power module 83, and the positive DC bus 807 to the positive electrode of the battery pack 600. This charging method can increase the charging voltage and improve the charging efficiency.

It can be seen that the winding inside the motor 700 and part of the A line 801 are reused during boost charging. In order to absorb the ripple current and filtering at the DC end, in some embodiments, during the boost charging process, in order to better optimize the EMC of the power module, a second capacitor 174 is provided, and the negative electrode of the second capacitor 174 and the negative electrode of the first capacitor 173 are both connected to the negative electrode of the charging device. While the positive electrode of the charging device is connected to the second A line conductive member 136, the positive electrode of the second capacitor 174 is also connected, so that the positive and negative electrodes of the DC charging are connected and conductive to the second capacitor 174. In this way, charging the battery pack by means of motor boost is achieved to improve the charging efficiency.

In some embodiments, the positive charging wire and the negative charging wire are connected to the second filter together. For example, the second filter can be a magnetic ring 117, which is recorded as the third magnetic ring 117. In order to better install the positive charging wire and the negative charging wire, the positive charging wire and the negative charging wire are passed through the third magnetic ring 117.

In some embodiments, in order to better optimize the EMC of the controller 800, the controller 800 also includes a third filter, and the positive charging wire and the negative charging wire are commonly connected to the third filter. For example, the third filter can be a pair of Y capacitors 116, and the pair of Y capacitors 116 can better filter out common mode interference.

When the charging voltage of the charging device is high (e.g., reaching 750V), after the charging current enters the controller 800, the negative charging current still flows to the battery pack through the same path. The positive charging current flows to the first connecting component 9 through the second switch element 124 (e.g., the second contactor). That is, boost charging is not required.

Therefore, the controller 800 monitors the charging voltage of the charging device and selects to open the first switch element 122 or the second switch element 124, so that the positive charging current reaches the battery pack 600 through different paths. When the first switch element 122 is turned on and the second switch element 124 is turned off, the positive charging current flows through the motor winding 701, and the charging voltage is raised. When the first switch element 122 is turned off and the second switch element 124 is turned on, the positive charging current flows directly to the positive DC bus 807 of the battery pack 600, and no longer flows through the motor winding 701, and the charging voltage maintains the original voltage value.

The positive DC bus 807 and the negative DC bus 808 are also collectively referred to as DC buses.

In some embodiments, when the battery pack 600 supplies power to the motor 700, the DC current from the battery pack 600 passes through the DC bus, the first connecting component 9 and the first magnetic ring 93 in sequence, flows into the first capacitor 173, and is then converted into AC power by the power module 83 and flows to the motor 700 through the AC Hall 100 to drive the motor 700.

In some embodiments, the negative current passes through the third fuse 133 before entering the first capacitor 173. To protect the boost charging and self-heating circuits, the positive current flows through the first fuse 134 when flowing from the first capacitor 173 to the DC bus.

In some embodiments, in order to make the vehicle charge more conveniently, a power module 884 is further provided in the controller 800, and the power module 884 is connected to an external AC power source (e.g., mains, AC220V) through the AC charging and discharging connector 3. To ensure safety, a second fuse 135 is further provided between the power module 884 and the first capacitor 173.

In the present application, two electrical locations being "at least indirectly connected" means that the two are directly connected via a wire (direct equipotential connection) or indirectly connected via an electronic component (equipotential connection).

The specific molded products will be described in detail below in different embodiments.

As shown in Figures 3 to 5, in some embodiments, the A line 801 does not pass through the controller 800, but is connected to the second end of at least one phase winding 701 of the motor 700 from the middle of the first sub-battery pack U1 and the second sub-battery pack U2. For example, one end of the A line 801 passes through the housing of the motor 700 and is connected to the battery pack 600, so that the A line 801 is equivalent to being arranged outside the housing 10 of the controller 800. In this embodiment, the design of the A line 801 is relatively simple. However, part of the A line from the housing of the motor 700 to the shell of the battery pack 600 needs to be covered, and this part of the A line is relatively long, and multiple fixings need to be separately set to fix it. In addition, the high-frequency interference of the power module 83 will be transmitted to the A line 801 through the motor 700, thereby causing EMC problems for the entire drive system 890.

In some embodiments, for example, when it is necessary to reuse the three-phase winding 701 of the motor 700 and the power module 83 of the controller 800 to realize the boost charging function, when When the A line 801 does not pass through the controller 800 , a second A line connecting the second end of at least one phase winding 701 of the motor 700 and the positive charging wire needs to be provided in the controller 800 . For example, the second A line can be a second A line conductive member 136 .

To solve the EMC problem of the entire drive system 890, in some embodiments, part of the A line 801 is disposed in a fourth filter, for example, the fourth filter is a magnetic ring, which can be recorded as a fourth magnetic ring, and the fourth magnetic ring is located at a position that is convenient for the A line 801 to pass through, and the fourth magnetic ring plays a filtering role to reduce the EMC problem caused by the channel A line 801. In some embodiments, part of the A line 801 passes through the fourth magnetic ring alone.

In order to solve the problem that part of the A line between the housing of the motor 700 and the housing of the battery pack 600 needs to be covered, in some embodiments, part of the A line 801 is arranged in the housing 10 of the controller 800. In this way, only the part of the A line between the housing of the battery pack 600 and the housing 10 of the controller 800 needs to be covered, and the rest does not need to be covered. At the same time, these embodiments also solve the problem that the part of the A line between the housing of the motor 700 and the housing of the battery pack 600 is long and needs to be fixed with multiple fixings separately.

In some embodiments, the A-line 801 is implemented by a plurality of interconnected, tangible conductive members (e.g., wires, copper bars, etc.). In the present application, as shown in FIG. 3 , the A-line 801 located in the housing 10 of the controller 800 is embodied as an A-line conductive component 860, which includes, for example, a first A-line conductive member 176 and a second A-line conductive member 136; for example, a third A-line conductive member 123 may also be included, and for example, a fourth A-line conductive member 131 may also be included.

In some embodiments, the A line 801 can have multiple connection modes, or include multiple sections. In the present application, a section of the A line 801 is recorded as the first A line. For example, in some embodiments, the first A line can be a section from the middle of the first sub-battery pack U1 and the second sub-battery pack U2 connected in series to the controller 800 (its second end is connected to the middle of the first sub-battery pack and the second sub-battery pack connected in series, and its first end is connected to the controller 800, for example, connected to the plug interface of the housing 10 of the controller 800); or, the first A line can be an A line inside the battery pack 600 (its first end is connected to the housing of the battery pack 600, and the second end is connected to the middle of the first sub-battery pack U1 and the second sub-battery pack U2); or the first A line can be a section from the battery pack 600 to the controller 800 (its first end is connected to the plug interface on the housing of the controller 800, and its second end is connected to the plug interface on the housing of the battery pack 600, similar to the first connection component 9).

During the heating process of the battery pack 600, the A line 801 alternately forms a loop with the positive DC bus 807 and the negative DC bus 808. Therefore, in some embodiments, at least a portion of the A line 801 is located between the positive DC bus 807 and the negative DC bus 808, so that the wiring harness can be conveniently arranged. For example, at least a portion of the first A line is located between the positive DC bus 807 and the negative DC bus 808.

In some embodiments, the inductance of the first A line, the positive DC bus and the negative DC bus are the same. The inductance of these three wires is the same, which can ensure the voltage balance between the A line and the positive pole of the battery pack, and between the A line and the negative pole of the battery pack, and improve the safety performance. In some embodiments, part of the positive DC bus 807, part of the negative DC bus 808 and part of the A line 801 are jointly arranged in the first filter. In some embodiments, the first filter is the first magnetic ring 93, and part of the positive DC bus 807, part of the negative DC bus 808 and part of the A line 801 are jointly arranged in the first magnetic ring 93 (jointly arranged in at least one magnetic ring), which can suppress common mode interference and have a good inhibitory effect on high-frequency noise. In some embodiments, part of the first A line and part of the DC bus are jointly arranged in the first magnetic ring 93.

In some embodiments, the first magnetic ring 93 is provided in at least one of the controller 800 and the battery pack 600. For example, the first magnetic ring 93 can be provided in the housing 10 of the controller 800, or the first magnetic ring 93 can be provided in the shell of the battery pack 600. In some embodiments, a third magnetic ring (not shown) can also be provided in the shell of the battery pack 600 to optimize the EMC of the battery pack. When the first A line and the DC bus need to pass through the housing 10 of the controller 800, the first magnetic ring 93 is provided in the housing 10. When the first A line and the DC bus need to pass through the shell of the battery pack 600, in some embodiments, the first magnetic ring 93 is provided in the shell.

In some embodiments, on the battery pack 600, only the positive DC bus terminal and the negative DC bus terminal are arranged on one side of the battery pack 600, while the A line terminal is not arranged on the same side as the positive DC bus terminal and the negative DC bus terminal, which results in the need to separately configure a socket for the A line terminal, resulting in increased costs.

In some embodiments, among the battery pack positive DC bus terminal, the battery pack negative DC bus terminal and the battery pack A line terminal on the battery pack 600, the battery pack A line terminal is not arranged between the battery pack positive DC bus terminal and the battery pack negative DC bus terminal. This results in a large difference between part of the A line in the battery pack 600 and part of the positive DC bus and part of the negative DC bus in the battery pack 600, which in turn results in a large common-mode current between part of the A line, part of the positive DC bus, and part of the negative DC bus in the battery pack 600, which in turn causes a voltage imbalance between the A line and the positive electrode of the battery pack, and between the A line and the negative electrode of the battery pack, thereby posing a safety hazard to the entire drive system.

In some embodiments, referring to FIG. 19 , the battery pack 600 includes a battery pack socket 609 . In order to solve the problem that the A-line terminal on one side of the battery pack 600 is configured with a socket separately, which leads to increased costs, the battery pack socket 609 is provided with a battery pack A-line terminal 611 , a battery pack positive DC bus terminal 612 and a battery pack negative DC bus terminal 613 . Among them, one end of the battery pack A-line terminal 611 is connected to the middle of the first sub-battery pack U1 and the second sub-battery pack U2 through the battery pack A-line copper bus 601 , and the other end is connected to the second end of at least one phase winding of the motor 700 . The battery pack positive DC bus terminal 612 is connected to the positive electrode of the battery pack 600 through the battery pack positive copper bus 602 . The battery pack negative DC bus terminal 613 is connected to the negative electrode of the battery pack 600 through the battery pack negative copper bus 603 . The battery pack A line terminal 611 is arranged between the battery pack positive DC bus terminal 612 and the battery pack negative DC bus terminal 613 .

As shown in FIGS. 3 to 5 , in some embodiments, the A-line terminal (referred to as the second A-line terminal) of the first connecting assembly 9 for connecting to one side of the battery pack 600 The second A-line terminal 812), the positive DC bus terminal (recorded as the second positive DC bus terminal 822), and the negative DC bus terminal (recorded as the second negative DC bus terminal 832) are jointly arranged in the same second plug connector 9B. That is, the second plug connector 9B is used to connect the battery pack 600. For example, as shown in FIG19, the second plug connector 9B is used to connect the battery pack socket 609. In other words, the battery pack socket 609 is used to insert the second plug connector 9B. It can be understood that the second A-line terminal 812 is used to connect to the battery pack A-line terminal 611, the second positive DC bus terminal 822 is used to connect to the battery pack positive DC bus terminal 612, and the second negative DC bus terminal 832 is used to connect to the battery pack negative DC bus terminal 613.

As shown in Figures 3 to 5, in order to solve the problem of voltage imbalance between line A and the positive electrode of the battery pack, and between line A and the negative electrode of the battery pack, in some embodiments, the second line A terminal 812 is arranged between the second positive DC bus terminal 822 and the second negative DC bus terminal 832; in some embodiments, in a direction perpendicular to the extension of the second line A terminal 812, the second positive DC bus terminal 822 and the second negative DC bus terminal 832, the second line A terminal 812, the second positive DC bus terminal 822 and the second negative DC bus terminal 832 at least partially overlap.

As shown in FIGS. 3 to 5 , in some embodiments, the housing 10 of the controller 800 is provided with a first plug interface 810, and the first plug interface 810 is used for one end of the first connection component 9, and the other end of the first connection component 9 is suitable for connecting to the battery pack 600, so that the controller 800 is connected to the battery pack 600. Since the A line 801 extends from the motor 700 through the controller 800 to the middle of the first sub-battery pack and the second sub-battery pack connected in series of the battery pack 600. In some embodiments, the first connection component 9 includes an A line wire segment 813 corresponding to the first A line, a positive DC bus wire segment 823 corresponding to the positive DC bus 807, and a negative DC bus wire segment 833 corresponding to the negative DC bus 808.

In some embodiments, the first end of the A-line conductor segment 813 is at least indirectly connected to the controller 800, and the second end of the A-line conductor segment 813 is at least indirectly connected to the middle of the first sub-battery pack U1 and the second sub-battery pack U2 connected in series. The first end of the positive DC bus conductor segment 823 is at least indirectly connected to the controller 800, and the second end of the positive DC bus conductor segment 823 is at least indirectly connected to the positive electrode (positive DC bus 807) of the battery pack 600. The first end of the negative DC bus conductor segment 833 is at least indirectly connected to the controller 800, and the second end of the negative DC bus conductor segment 833 is at least indirectly connected to the negative electrode (negative DC bus 808) of the battery pack 600.

In some embodiments, the first end of the A-line conductor segment 813 is connected to the first A-line terminal 811. The first A-line terminal 811 is connected to the controller 800. That is, the two ends of the first A-line terminal 811 are respectively connected to the controller 800 and the first end of the A-line conductor segment 813. In some embodiments, the controller 800 is provided with an A-line support position 59 for being detachably connected to the first end of the A-line conductor segment 813 at least indirectly. The first plug interface 810 is used to allow the first end of the A-line conductor segment 813 to be directly or indirectly inserted. In some embodiments, after the first A-line terminal 811 is inserted into the first plug interface 810, it is directly and detachably installed in the A-line support position 59. Thus, the first plug interface 810 is used to allow the A-line conductor segment 813 to be inserted through the first A-line terminal 811, and the first A-line terminal 811 is detachably connected to the A-line support position 59. The second end of the A-line conductor segment 813 is connected to the second A-line terminal 812 (battery pack A-line terminal), and is connected to the middle of the first sub-battery pack U1 and the second sub-battery pack U2 connected in series through the second A-line terminal 812. It can be understood that the first A-line terminal 811, the A-line conductor segment 813 and the second A-line terminal 812 constitute a section of the A-line 801, that is, constitute a first A-line. In the controller 800, all electrical parts that are equipotentially connected to the A-line support position 59 are electrical parts on the A-line 801.

In some embodiments, the first end of the positive DC bus wire segment 823 is connected to the first positive DC bus terminal 821. The first positive DC bus terminal 821 is connected to the controller 800. That is, the two ends of the first positive DC bus terminal 821 are respectively connected to the controller 800 and the first end of the positive DC bus wire segment 823. In some embodiments, the controller 800 is provided with a positive DC bus support position 58A, which is used to be detachably connected to the first end of the positive DC bus wire segment 823 at least indirectly. A positive DC bus terminal 58 is provided at the position of the positive DC bus support position 58A. After the first positive DC bus terminal 821 is inserted into the first plug interface 810, it is directly and detachably connected to the positive DC bus terminal 58. The second end of the positive DC bus wire segment 823 is connected to the second positive DC bus terminal 822 (positive DC bus terminal of the battery pack), and is at least indirectly connected to the positive electrode of the battery pack 600 through the second positive DC bus terminal 822. It can be understood that the first positive DC bus terminal 821, the positive DC bus wire segment 823, and the second positive DC bus terminal 822 constitute at least a part of the positive DC bus 807. The positive DC bus terminal 58 is the positive DC bus terminal of the controller 800, which is used to connect the positive DC bus 807, that is, the positive electrode of the battery pack 600.

In some embodiments, the first end of the negative DC bus wire segment 833 is connected to the first negative DC bus terminal 831. The first negative DC bus terminal 831 is connected to the controller 800. That is, the two ends of the first negative DC bus terminal 831 are respectively connected to the controller 800 and the first end of the negative DC bus wire segment 833. For example, the controller 800 is provided with a negative DC bus support position 60A, which is used to be detachably connected to the first end of the negative DC bus wire segment 833 at least indirectly. A negative DC bus terminal 60 is provided at the position of the negative DC bus support position 60A. After the first negative DC bus terminal 831 is inserted into the first plug interface 810, it is directly and detachably connected to the negative DC bus terminal 60. The second end of the negative DC bus wire segment 833 is connected to the second negative DC bus terminal 832 (battery pack negative DC bus terminal), and is at least indirectly connected to the negative pole of the battery pack 600 through the second negative DC bus terminal 832. It can be understood that the first negative DC bus terminal 831, the negative DC bus conductor segment 833, and the second negative DC bus terminal 832 constitute at least a portion of the negative DC bus 808. The negative DC bus terminal 60 is a negative DC bus terminal of the controller 800, and is used to connect the negative DC bus 808, that is, the negative electrode of the battery pack 600.

In some embodiments, the first A line terminal 811, the first positive DC bus terminal 821 and the first negative DC bus terminal 831 are located at one end of the first connecting component 9 for connecting to the controller 800; the second A line terminal 812, the second positive DC bus terminal 822 and the second negative DC bus terminal 832 are located at one end of the first connecting component 9 for connecting to the battery pack 600.

In some embodiments, the first A-line terminal 811 is located between the first positive DC bus terminal 821 and the first negative DC bus terminal 831. In some embodiments, the A-line wire segment 813 is located between the positive DC bus wire segment 823 and the negative DC bus wire segment 833. In some embodiments, the first plug interface 810 is disposed on the first socket 809, and the first socket 809 is disposed on the housing 10. The first magnetic ring 93 surrounds the plug interface 810 at the periphery of the first plug interface 810.

In some embodiments, one end of the first connection component 9 for connecting the controller 800 forms a first plug connector 9A, which is inserted into the plug interface 810 and the first magnetic ring 93. Therefore, the first A-line terminal 811, the first positive DC bus terminal 821, and the first negative DC bus terminal 831 pass through the plug interface 810 and the first magnetic ring 93 together, that is, the first A-line and the DC bus pass through the plug interface 810 and the first magnetic ring 93 together, that is, the A-line 801 and the DC bus pass through the first magnetic ring 93 together. In some embodiments, the first A-line terminal 811, the first positive DC bus terminal 821, and the first negative DC bus terminal 831 pass through the plug interface 810 and the first magnetic ring 93 in parallel with each other.

The first A-line connection terminal 811 can be understood as the A-line connection terminal of the plug connector 9A. The first positive DC bus connection terminal 821 can be understood as the positive connection terminal of the plug connector DC bus of the plug connector 9A. The first negative DC bus connection terminal 831 can be understood as the negative connection terminal of the plug connector DC bus of the plug connector 9A. The first positive DC bus connection terminal 821 can be understood as one end of the DC bus for connecting to the controller 800. Therefore, the first A-line and one end of the DC bus for connecting to the controller 800 are fixed in the plug connector 9A.

It can be understood that on one side of the battery pack 600, a socket can also be provided on its shell, and the socket is provided with a plug interface, and a second magnetic ring is provided on the periphery of the plug interface, and the plug connector formed by the second A line terminal 812, the second positive DC bus terminal 822 and the second negative DC bus terminal 832 passes through the second magnetic ring, forming a situation similar to the plug connector 9A being inserted into the plug interface 810. That is, the second positive DC bus terminal 822, the second A line terminal 812 and the second negative DC bus terminal 832 pass through the second magnetic ring together. The second A line terminal 812 is located between the second positive DC bus terminal 822 and the second negative DC bus terminal 832. The second A line terminal 812 is arranged in parallel with the second positive DC bus terminal 822 and the second negative DC bus terminal 832.

The present application may also be constructed such that the A-line conductor segment 813 , the positive DC bus conductor segment 823 , and the negative DC bus conductor segment 833 pass through a magnetic ring together.

In some embodiments, the lengths of the A-line conductor segment 813, the positive DC bus conductor segment 823, and the negative DC bus conductor segment 833 are substantially the same or the same. For example, the lengths of the A-line conductor segment 813, the positive DC bus conductor segment 823, and the negative DC bus conductor segment 833 between the first plug connector 9A and the second plug connector 9B are the same. In some embodiments, the wire diameters of the A-line conductor segment 813, the positive DC bus conductor segment 823, and the negative DC bus conductor segment 833 are substantially the same or the same. This arrangement is conducive to making the inductances of the A-line conductor segment 813, the positive DC bus conductor segment 823, and the negative DC bus conductor segment 833 the same.

The A-line conductive component 860 is disposed in the housing 10 , so that the controller 800 can be applicable to both vehicles with a battery pack self-heating function and vehicles without a battery pack self-heating function.

In some embodiments, the vehicle has a battery pack self-heating function, and the A line 801 extends from the second end of the motor winding 701 to the middle of the first sub-battery pack U1 and the second sub-battery pack U2, so the second end 862 of the A line conductive component is at least indirectly connected to the second end of at least one phase winding 701, and the first end 861 of the A line conductive component is at least indirectly connected to the first sub-battery pack and the second sub-battery pack connected in series. That is, when the second end 862 of the A line conductive component is at least indirectly connected to the second end of at least one phase winding 701, the first end 861 of the A line conductive component is at least indirectly connected to the middle of the first sub-battery pack and the second sub-battery pack connected in series; or, when the first end 861 of the A line conductive component is at least indirectly connected to the first sub-battery pack and the second sub-battery pack connected in series, the second end 862 of the A line conductive component is at least indirectly connected to the second end of at least one phase winding 701.

In some embodiments, if the vehicle does not have the battery pack self-heating function, the two ends of the A-line conductive component 860 of the controller 800 are no longer connected to the battery pack 600 and the motor 700. That is, the second end 862 of the A-line conductive component is not connected to the motor 700, and the first end 861 of the A-line conductive component is not connected to the middle of the first sub-battery pack and the second sub-battery pack in series. In other words, when the second end 862 of the A-line conductive component is not connected to the motor 700, the first end 861 of the A-line conductive component is also not connected to the battery pack 600. In other words, when the first end 861 of the A-line conductive component is not connected to the battery pack 600, the second end 862 of the A-line conductive component is also not connected to the motor 700.

The following continues to describe the controller 800 and an embodiment of how the controller 800 is connected to a charging device.

As mentioned above, the controller 800 is connected to the charging device through the second connection component 4. In some embodiments, as shown in Figures 3 and 6, the housing 10 of the controller 800 is provided with a charging socket 115, and the plug of the second connection component 4 is inserted into the power socket 882 (charging interface) of the charging socket 115. The charging socket 115 includes a positive charging terminal 170 and a negative charging terminal 171.

As shown in FIG6 , in the present application, the charging socket 115 is also referred to as a magnetic ring seat assembly 115. In some embodiments, the charging socket 115 includes an insulating substrate 881, a first capacitor mounting groove 169A, and a first magnetic ring capacitor 116A. In some embodiments, the first capacitor mounting groove 169A is used to accommodate the first magnetic ring seat capacitor 116A. The first magnetic ring seat capacitor 116A has a rectangular parallelepiped shape. It can be understood that the first magnetic ring seat capacitor 116A has at least three first capacitor side walls. The first capacitor mounting groove 169A has at least three first groove side walls 169C, and the three first groove side walls 169C and the three first capacitor side walls are non-detachably connected one by one. For example, the side wall of the first magnetic ring seat capacitor 116A is bonded to the three first groove side walls 169C, and the installation of the first magnetic ring seat capacitor 116A on the magnetic ring seat assembly is very reliable.

As shown in FIG. 6 , in some embodiments, the magnetic ring seat assembly 115 further includes a power socket 880 .

As shown in FIG. 6 , in some embodiments, the magnetic ring seat assembly 115 further includes a third magnetic ring 117 .

As shown in FIG. 6 , in some embodiments, the magnetic ring seat assembly 115 further includes a second magnetic ring seat capacitor 116B.

As shown in FIG6 , in some embodiments, the substrate 881 is provided with a positive terminal 170 for connecting to the positive pole of the charging power source, a negative terminal 171 for connecting to the negative pole of the charging power source, and a grounding terminal for connecting to a ground line. The grounding terminal includes a first grounding terminal 168 and a second grounding terminal 172 that are short-circuited with each other.

As shown in FIG. 6 , in some embodiments, a power socket 880 is provided to a substrate 881 for connecting (accommodating) an external power plug (i.e., a plug of a charging device). The power socket 880 includes a power socket 882 and a magnetic ring mounting groove 166. The power socket 882 is used to accommodate an external power plug. The power socket 882 runs through the power socket 880 along a first direction D1. The power socket 880 includes a socket first side 885 and a socket second side 886 that are oppositely arranged along the first direction D1, and the external power plug is used to be inserted into the power socket 882 from the socket second side 886. That is, the socket second side 886 is used to face the outside of the external device, and the socket first side 885 is the inside. In some embodiments, the magnetic ring mounting groove 166 is provided in the power socket 880 and surrounds the power socket 882 at the periphery of the power socket 882. In some embodiments, the outer surface of the magnetic ring mounting groove 166 is connected to the substrate 881. In some embodiments, the substrate 881 and the power socket 880 can be formed integrally, for example, by injection molding. In some embodiments, the substrate 881 is parallel to the axis (i.e., the first direction D1) of the power socket 882. On the side of the magnetic ring seat assembly 115 facing the external power plug, the end surface of the power socket 882 is flush with the end surface of the substrate 881, or the end surface of the power socket 882 protrudes from the end surface of the substrate 881. That is, the second side 886 of the socket is flush with the end surface of the substrate 881 along the first direction D1, or the second side 886 of the socket protrudes from the substrate 881 along the first direction D1.

As shown in FIG. 6 , in some embodiments, the third magnetic ring 117 is disposed in the magnetic ring installation groove 166 , for example, bonded in the magnetic ring installation groove 166 .

As shown in Figure 6, in some embodiments, the substrate 881 is also provided with a second capacitor mounting groove 169B. The second capacitor mounting groove 169B is used to accommodate the second magnetic ring seat capacitor 116B. The second magnetic ring seat capacitor 116B has a rectangular shape. It can be understood that the second magnetic ring seat capacitor 116B has at least three second capacitor side walls. The second capacitor mounting groove 169B has at least three second groove side walls 169D, and the three second groove side walls 169C and the three second capacitor side walls are non-detachably connected one by one. For example, the side wall of the second magnetic ring seat capacitor 116B is bonded to the three second groove side walls 169D. In some embodiments, the first capacitor mounting groove 169A and the second capacitor mounting groove 169B are symmetrically arranged about the axis of the power socket 880, so that the first magnetic ring seat capacitor 116A and the second magnetic ring seat capacitor 116B are symmetrically arranged about the axis of the power socket 882.

As shown in FIG6 , in some embodiments, the first magnetic ring seat capacitor 116A can also be non-detachably connected to the substrate 881, for example, bonded to the substrate 881. The first capacitor pin of the first magnetic ring seat capacitor 116A is electrically connected to the positive terminal 170, and the second capacitor pin is electrically connected to the ground terminal, for example, the first ground terminal 168. The second magnetic ring seat capacitor 116B can also be non-detachably connected to the substrate 881, for example, bonded to the substrate 881. The first capacitor pin of the second magnetic ring seat capacitor 116B is electrically connected to the negative terminal 171, and the second capacitor pin is electrically connected to the ground terminal, for example, the second ground terminal 172. The first magnetic ring seat capacitor 116A and the second magnetic ring seat capacitor 116B can be configured as Y capacitors. In some embodiments, the length direction of the first magnetic ring seat capacitor 116A is parallel to the axial direction of the power socket 882 (i.e., the first direction D1), and/or the length direction of the second magnetic ring seat capacitor 116B is parallel to the axial direction of the power socket 882.

As shown in FIG6 , in some embodiments, the bottom wall of the magnetic ring mounting groove 166 is disposed on the first side 885 of the socket, that is, the magnetic ring mounting groove 166 is not a through groove extending along the first direction D1, and has a blind end on the first side 885 of the socket. In some embodiments, the first magnetic ring seat capacitor 116A and the second magnetic ring seat capacitor 116B are both disposed adjacent to the first side 885 of the socket. In some embodiments, the side wall of the first magnetic ring seat capacitor 116A abuts against the first side 885 of the socket, and the side wall of the second magnetic ring seat capacitor 116B also abuts against the first side 885 of the socket, so that the first magnetic ring seat capacitor 116A and the second magnetic ring seat capacitor 116B are limited all around, so that the first magnetic ring seat capacitor 116A and the second magnetic ring seat capacitor 116B are firmly installed.

As shown in FIG6 , in some embodiments, the positive terminal 170 and the negative terminal 171 are also symmetrically arranged about the axis of the power socket 882, and the first grounding terminal 168 and the second grounding terminal 172 are also symmetrically arranged about the axis of the power socket 882, so that the magnetic ring seat assembly 115 has a symmetrical structure as a whole. For example, the positive terminal 170 and the first grounding terminal 168 are respectively located on both sides of the first capacitor installation groove 169A (that is, the first magnetic ring seat capacitor 116A), and the negative terminal 171 and the second grounding terminal 172 are respectively located on both sides of the second capacitor installation groove 169B (that is, the second magnetic ring seat capacitor 116B).

As shown in Figure 6, in some embodiments, the magnetic ring seat assembly 115 also includes a partition wall 883. The partition wall 883 is arranged on the substrate 881 and protrudes from the substrate 881. The partition wall 883 and the power socket 880 are located on the same side of the substrate 881. The partition wall 883 extends along the axial direction of the power socket 882 and is used to separate the positive and negative poles of the external power plug. The positive terminal 170 and the negative terminal 171 are respectively located on both sides of the partition wall 883. The partition wall 883 is equivalent to being arranged at the position of the symmetry axis of the magnetic ring seat assembly 115. It can be understood that the partition wall 883 is made of insulating material. In some embodiments, the partition wall 883 is integrally formed with the substrate 881. In some embodiments, the partition wall 883, the substrate 881 and the socket 880 are integrally formed.

As shown in FIG. 6 , in some embodiments, the magnetic ring seat assembly 115 further includes at least one wire harness clamping portion 167 , which is disposed on the outer surface of the magnetic ring mounting groove 166 for clamping the wire harness.

Since capacitor 116A, capacitor 116B and magnetic ring 117 are all bonded and installed, the magnetic ring seat assembly 115 becomes an integrated charging socket, which is conducive to automated production.

The magnetic ring seat assembly 115 is used to be installed on the box 10, for example, the base plate 881 is connected to the box 10, so that the power socket 882 is exposed from the box 10, so that the second connection assembly 4 can be inserted into the power socket 882, and the controller 100 is connected to the charging device. In some embodiments, when the drive system 890 is installed in a vehicle, the axis of the power socket 882 is parallel to the axis of the wheel, so that the plug of the charging device is inserted from the side wall of the vehicle (the side of the door).

In some embodiments, the first socket 809 and the magnetic ring seat assembly 115 are arranged on the same side wall of the box 10 , that is, the first connecting assembly 9 and the second connecting assembly 4 are connected to the same side of the box 10 .

The following will continue to introduce some embodiments of the controller 800 and its connection with the motor 700.

As shown in FIG. 3 , the controller 800 is provided with a first terminal block 99 . As shown in FIG. 7 , the motor 700 is provided with a motor terminal block 146 . The first terminal block 99 is used to connect to the motor terminal block 146 , thereby realizing the connection between the controller 800 and the motor 700 .

In some embodiments, the connection between the controller 800 and the motor 700 includes the connection of the A line 801 and the connection of the first end of the three-phase winding 701, that is, the controller 800 is connected to the first end and the second end of the three-phase winding 701 respectively.

In some embodiments, as shown in FIG7 , the motor terminal block 146 includes a motor A line terminal 144, an electric control A line terminal 148, a motor three-phase line terminal 145, and an electric control three-phase line terminal 147. Inside the motor 700, the second end of the three-phase winding 701 is first collected inside the motor 700 and then connected to the motor A line terminal 142. The motor A line terminal 142 is connected to the motor A line terminal 144 of the motor terminal block 146. Inside the motor terminal block 146, the motor A line terminal 144 is connected to the electric control A line terminal 148. The first end of the three-phase winding 701 is connected to the motor three-phase line terminal 143, and the motor three-phase line terminal 143 is connected to the motor three-phase line terminal 145 of the motor terminal block 146. The motor three-phase line terminal 145 of the motor terminal block 146 is correspondingly connected to the electric control three-phase line terminal 147 of the motor terminal block 146.

As shown in FIG3 , the first terminal block 99 is provided with a first terminal block three-phase terminal 101. The electric control three-phase line terminal 147 is used to connect the first terminal block three-phase terminal 101. The electric control A line terminal 148 is connected to the second end 862 of the A line conductive component 860 of the controller 800 of the A line 801 (see FIG3 ). The second end 862 of the A line conductive component is set to the first terminal block 99, so that the first terminal block 99 supports the second end 862 of the A line conductive component. At the same time, the first terminal block three-phase terminal 101 and the second end 862 of the A line conductive component are close to each other, which is convenient for connection with the corresponding terminal of the motor 700.

As shown in FIG8 , the box body 10 is provided with a second opening 32, which is arranged adjacent to the first wiring seat 99, and is used to connect the first wiring seat three-phase terminal 101 and the second end 862 of the A-line conductive component to the motor 700. For example, the motor wiring seat 146 can directly enter the interior of the box body 10 from the second opening 32 and connect to the terminal at the first wiring seat 99.

The second opening 32 is used for the A-line conductive component second end 862 to pass directly or indirectly through and then connect to the motor 700. In the present application, the A-line conductive component second end 862 indirectly passes through the second opening 32, which means that the current flowing through the A-line conductive component second end 862 passes through the second opening 32.

In some embodiments, the first terminal block three-phase terminal 101 and the second end 862 of the A line conductive component are arranged side by side (see Figure 4), and the electric control three-phase line terminal 147 and the electric control A line terminal 148 are arranged side by side.

Some embodiments of the controller 800 are further introduced below, especially the relationship between the controller 800 and the A line 801.

As shown in FIG3 , the controller 800 includes a power module 83 and an A-line conductive component 860. The power module 83 and the A-line conductive component 860 are disposed in the housing 10. The A-line conductive component 860 is also a part of the A-line 801 in the controller 800.

As shown in FIGS. 3 and 9 , the A-line conductive component 860 includes an A-line conductive component first end 861 and an A-line conductive component second end 862. The A-line conductive component first end 861 is used to at least indirectly connect to the middle of the first sub-battery pack U1 and the second sub-battery pack U2 connected in series in the battery pack 600. The A-line conductive component second end 862 is used to at least indirectly connect to the second end of at least one phase winding 701 of the motor 700. In some embodiments, the A-line conductive component second end 862 is used to at least indirectly connect to the second end of the three-phase winding 701 of the motor 700.

It can be understood that the first plug interface 810 is used for the first end 861 of the A-line conductive component to pass directly or indirectly to connect with the battery pack 600. In the present application, the first end 861 of the A-line conductive component indirectly passes through the first plug interface 810, which means that the current flowing through the first end 861 of the A-line conductive component will pass through the first plug interface 810.

In some embodiments, the A-line conductive component includes a first A-line conductive member 176 and a second A-line conductive member 136. The first A-line conductive member 176 has a first A-line conductive member first end 176A and a first A-line conductive member second end 176B, and the first A-line conductive member first end 176A is the A-line conductive member first end 861. The second A-line conductive member 136 has a second A-line conductive member first end 136A and a second A-line conductive member second end 136B, and the second A-line conductive member first end 136A is connected to the first A-line conductive member second end 176B, and the second A-line conductive member second end 136B is the A-line conductive member second end 862. In some embodiments, the first A-line conductive member second end 176B is connected to the second A-line conductive member first end 136A through a fixing seat 132. The fixing seat 132 generally adopts an insulating member, which is used to support the first A-line conductive member 176 and the second A-line conductive member 136, reduce their shaking in the controller box 10, and improve the reliability of the controller 800.

As shown in FIG. 3 , as described above, the controller 800 is provided with an A-line support 59, which is used to be at least indirectly connected to the middle of the first sub-battery pack U1 and the second sub-battery pack U2 connected in series in the battery pack 600 through a connector. For example, the first end 176A of the first A-line conductive member is fixedly mounted to the A-line support. 59, that is, the first end 861 of the A-line conductive component is fixed to the A-line support position 59 and connected to the first A-line terminal 811, thereby connecting to the middle of the first sub-battery pack U1 and the second sub-battery pack U2 through the A-line of the first connecting component 9.

As can be seen from FIG. 2 , the controller 800 is connected to the first end of the three-phase winding 701 of the motor 700, and is also connected to the second end of the three-phase winding 701 (i.e., the end point of the A line in the motor). The second end 136B of the second A line conductive member is connected to the first wire holder A line terminal 802 of the first wire holder 99, thereby connecting the second end of the winding 701.

Thus, the drive system 890 realizes the connection of the A line from the motor 700 to the battery pack 600 through the controller 800.

In some embodiments, the A-line conductive component 860 further includes an A-line conductive component third end 863, and the A-line conductive component third end 863 is at least indirectly connected to the charging positive electrode terminal 170. For example, the A-line conductive component 860 further includes a third A-line conductive member 123, and the third A-line conductive member 123 is used to connect the second A-line conductive member 136 and the charging positive electrode wire. In this embodiment, it is mainly used for boost charging. This design can reuse the second A-line conductive member 136, reduce some copper bars, make the controller 800 more integrated, and also save costs.

In some embodiments, as shown in FIG. 9 , the third A-line conductive member 123 has a third A-line conductive member first end 123A and a third A-line conductive member second end 123B. The first A-line conductive member 176 also includes a first A-line conductive member third end 176C. The first A-line conductive member third end 176C is disposed close to the first A-line conductive member second end 176B. The third A-line conductive member first end 123A is connected to the first A-line conductive member third end 176C. The third A-line conductive member second end 123B is the A-line conductive member third end 863. In some embodiments, the A-line conductive member 860 also includes a fourth A-line conductive member 131. The fourth A-line conductive member 131 includes a fourth A-line conductive member first end 131A and a fourth A-line conductive member second end 131B. The two ends of the fourth A-line conductive member 131 are respectively connected to the first A-line conductive member third end 176C and the third A-line conductive member first end 123A.

In other embodiments, as shown in Fig. 10, the third A-line conductive member first end 123A is connected to the second A-line conductive member first end 136A. The two ends of the fourth A-line conductive member 131 are respectively connected to the second A-line conductive member first end 136A and the third A-line conductive member first end 123A, so that the third A-line conductive member first end 123A is connected to the second A-line conductive member first end 136A.

In some embodiments, the first switch element 122 is disposed in the housing 10, and the second end of the first switch element 122 is connected to the second end 123B of the third A-line conductive component. The second end of the first switch element 122 is connected to the positive charging terminal 170. Therefore, the third end 863 of the A-line conductive component is connected to the positive charging terminal 170 through the first switch element 122.

In some embodiments, the first A-line conductive member 176, the second A-line conductive member 136, the third A-line conductive member 123 and the fourth A-line conductive member 131 are all constructed as copper bars, and the four are connected at the same potential. It can be understood that the fixing seat 132 is also connected to the four at the same potential.

As shown in Figure 3, in some embodiments, the controller 800 also includes a capacitor assembly 55, the capacitor assembly 55 includes an insulating base 911, and an A-line support position 59 is provided on the insulating base 911. The A-line support position 59 is arranged adjacent to the first plug interface 810. In this way, a separate A-line support position can be omitted, so that the controller 800 is more integrated and can also save costs.

In some embodiments, the first end 176A of the first A-line conductive member is detachably connected to the A-line support position 59. The span of the A-line conductive component 860 in the housing 10 is relatively large. In some embodiments, the A-line conductive component 860 is at least partially disposed in the capacitor housing of the capacitor component 55. The capacitor housing has an insulating property. In this way, the capacitor component 55 can support the A-line conductive component 860, reduce the insulating support of the A-line conductive component 860, improve the integration of the controller 800, and save costs.

In some embodiments, the first A-line conductive member 176 is attached to the capacitor housing of the capacitor assembly 55. Since the A-line 801 can be used for both self-heating of the battery pack 600 and boost charging of the battery pack 600, during the self-heating process, the current passing through the A-line 801 can be as high as 500A, which will generate a lot of heat. In other words, a large current will pass through the first A-line conductive member 176, thereby generating a lot of heat. If the heat cannot be dissipated in time, it will have a great impact on the capacitor assembly, and even cause the capacitor assembly 55 to explode.

In order to solve the problem that the first A-line conductive member 176 is disposed on the capacitor assembly 55, resulting in low reliability of the capacitor assembly 55, a heat conductive member 102 is further disposed in the housing 10. The heat conductive member 102 is disposed between the first A-line conductive member 176 and the inner wall of the housing 10 of the controller 800. The heat conductive member 102 is configured as heat conductive mud, for example. The housing 10 of the controller 800 is generally made of metal, which has a good thermal conductivity, so that the heat generated by the first A-line conductive member 176 can be better exported from the housing 10 in a timely manner.

In some embodiments, the controller 800 further includes an insulating member 91. The insulating member 91 is disposed between the heat conductive member 102 and the inner wall of the box body 10 to insulate the first A-line conductive member 176 from the box body 10 made of metal.

In some embodiments, as shown in Figure 8, the upper surface of the insulating member 91 contacts the lower surface of the upper cover of the box body 10, the lower surface of the insulating member 91 contacts the upper surface of the thermal conductor 102, and the lower surface of the thermal conductor 102 contacts the A-line conductive component 860 (for example, the upper surface of the first A-line conductive member 176).

As shown in Fig. 3, in some embodiments, the insulating member 91 and the heat conducting member 102 have the same cross-sectional shape. For example, in the projection along the up-down direction, the insulating member 91 and the heat conducting member 102 have the same shape, and have substantially the same shape as the first A-line conductive member 176. The three are matched and arranged, so as to achieve the effects of effective heat dissipation, effective insulation, and material saving.

The following describes the structure of the positive electrode circuit path during boost charging in the controller 800.

In conjunction with FIG. 2 and FIG. 3 , the positive charging wire is connected to the second end of the winding 701 through the first contactor 122. A second conductive component 806 is provided in the controller 800, and the second conductive component 806 includes the first contactor 122. The first end of the second conductive component 806 is provided at the charging socket 115 for connecting the positive electrode of the charging device, and the second end of the second conductive component 806 is connected to the second end of at least one phase winding 701. In some embodiments, the second end of the second conductive component 806 is connected to the second end of the three-phase winding 701.

First, the working principle of the first contactor 122 is introduced with reference to Figure 11. The first contactor 122 is provided with a first contactor contact 621 and a second contactor contact 622, and a movable plate 624 for connecting or disconnecting the first contactor contact 621 and the second contactor contact 622. The contacts 621 and 622 are exposed on the surface of the contactor 122, and the two extend to the inside of the contactor 122 through their respective terminals 623A and 623B. The magnet 629 and the coil 628 are arranged at intervals along the moving direction DM. The coil 628, the connecting shaft 626 and the movable plate 624 are fixedly connected together, and the three can move synchronously along the moving direction DM. The limit post 627 is a fixed component inside the contactor 122, and the spring 625 is connected between the limit post 627 and the movable plate 624. When the contactor 122 is powered on, the coil 628 is powered on to generate magnetism and is attracted by the magnet 629, so that the coil 628 drives the movable plate 624 to move toward the magnet 629 along the moving direction DM through the connecting shaft 626, so that the movable plate 624 contacts the terminals 623A and 623B, thereby connecting the contacts 621 and 622. At this time, the spring 625 is stretched. After the power is turned off, the restoring force of the spring 625 pulls the movable plate 624 away from the two terminals 623A and 623B, so that the two contacts 621 and 622 are disconnected, and the coil 628 returns to its original position.

In the present application, in some embodiments, the moving direction DM of the moving plate 624 of the first contactor 122 is parallel to the axial direction of the wheel axle; or, the moving direction of the moving plate 624 is perpendicular to the driving direction of the vehicle. This has the advantage of preventing the contactor 122 from being mistakenly attracted due to the inertia force of sudden acceleration and deceleration or bumpy road conditions during driving. Since the contactor 122 is attracted, the current is connected to the motor 700. If the contactor 122 is mistakenly attracted, the second connecting component 4 will be charged, thereby bringing the risk of electric shock to the vehicle user.

In some embodiments, the second conductive component 806 includes a positive conductive component 850, a first contactor 122, and an additional positive conductive component 865. As shown in FIGS. 3 and 12, the positive conductive component 850 includes a positive conductive component first end 851 and a positive conductive component second end 852. The positive conductive component first end 851 is connected to the positive electrode of the charging device, and the positive conductive component second end 852 is connected to the contactor first contact 621. As shown in FIGS. 3 and 9, the additional positive conductive component 865 includes an additional positive conductive component first end 866 and an additional positive conductive component second end 867. The additional positive conductive component first end 866 is connected to the second end of at least one phase winding 701, and the additional positive conductive component second end 867 is connected to the contactor second contact 622.

In some embodiments, the positive conductive component 850 includes a charging positive terminal 170 and a sub-positive conductive component 853. The charging positive terminal 170 is provided on the charging socket 115, and is used to connect the positive electrode of the charging device, which is the positive conductive component first end 851. The sub-positive conductive component 853 includes a sub-positive conductive component first end 854 and a positive conductive component second end 855. The sub-positive conductive component first end 853 is connected to the charging positive terminal 170, and the sub-positive conductive component second end 855 is connected to the contactor first contact 621, which is the positive conductive component second end 852.

As shown in FIG. 12 , in some embodiments, the sub-positive electrode conductive component 853 includes a first positive electrode conductive component 125 and a second positive electrode conductive component 127. The first positive electrode conductive component 125 includes a first positive electrode conductive component first end 125A and a first positive electrode conductive component second end 125B. The first positive electrode conductive component first end 125A is the sub-positive electrode conductive component first end 853. The second positive electrode conductive component 127 includes a second positive electrode conductive component first end 127A and a second positive electrode conductive component second end 127B. The second positive electrode conductive component first end 127A is connected to the first positive electrode conductive component second end 125A, and the second positive electrode conductive component second end 127B is the sub-positive electrode conductive component second end 855, that is, the positive electrode conductive component second end 852.

The first end 125A of the first positive conductive member is connected to the positive charging terminal 170 to introduce a positive charging current, and the second end 127B of the second positive conductive member is connected to the first contactor 122 .

As shown in Figures 3 and 9, the additional positive conductive component 865 includes an additional positive conductive component first end 866 and an additional positive conductive component second end 867. The additional positive conductive component first end 866 is connected to the second end of at least one phase winding 701, and the additional positive conductive component second end 867 is connected to the contactor second contact 622.

As mentioned above, during the boost charging process, the path of the positive current reuses part of the A line 801. In the present application, the path from the second end 862 of the A line conductive component to the third end 863 of the A line conductive component 860 constitutes an additional positive conductive component 865 (or, the additional positive conductive component 865 constitutes the path from the second end 862 of the A line conductive component to the third end 863 of the A line conductive component 860), wherein the second end 862 of the A line conductive component is the additional positive conductive component first end 866, and the third end 863 of the A line conductive component is the additional positive conductive component second end 867. That is, the third A line conductive member 123, the fourth A line conductive member 131, the first A line conductive member second end 176C, the first A line conductive member second end 176B, the fixing seat 132 and the second A line conductive member 136 constitute the additional positive conductive component 865. Alternatively, as shown in FIG. 10 , the third A-line conductive member 123 , the fourth A-line conductive member 131 , the fixing seat 132 and the second A-line conductive member 136 constitute an additional positive electrode conductive component 865 .

It can be seen that the A-line conductive component third end 863 of the A-line conductive component 860 is connected to the charging positive terminal 170 through the first contactor 122 and the sub-positive conductive component 853 .

2 and 3 , the charging positive current is also diverted to the second capacitor 174 before passing through the first contactor 122. Therefore, the second positive conductive member 127 further includes a second positive conductive member third end 127C, which is connected to the second capacitor positive electrode second input terminal 72 to be connected to the positive electrode of the second capacitor 174.

As shown in FIG3 , the controller 800 further includes a second switch element 124 and a third positive electrode conductor 128. According to the schematic diagram 2, when boost charging is not required, the first positive electrode conductor 125 directs the charging positive electrode current to the second switch element 124. The first positive electrode conductor 125 further includes a first positive electrode conductor third end 125C, and the first end of the second switch element 124 is connected to the first positive electrode conductor third end 125C. The third positive electrode conductor 128 includes a third positive electrode conductor first end 128A and a third positive electrode conductor second end 128B. Among them, the third positive electrode conductor first end 128A is connected to the second end of the second switch element 124, and the third positive electrode conductor second end 128B is at least indirectly connected to the positive electrode of the battery pack 600.

The second end 128B of the third positive conductor is connected to the positive connection terminal 71, and the positive connection terminal 71 is connected to the positive DC bus terminal 58 at the same potential (for example, terminals of the same copper bus), so that the second end 128B of the third positive conductor is connected to the DC bus terminal 58, and then connected to the positive electrode of the battery pack 600 through the first connecting component 9.

In some embodiments, in the controller 800, the negative current routing for charging is arranged as follows.

As shown in FIGS. 3 and 13 , the controller 800 includes a negative electrode conductive component 840. The negative electrode conductive component 840 includes a negative electrode conductive component first end 841 and a negative electrode conductive component second end 842. The negative electrode conductive component first end 841 is connected to the negative electrode of the charging device, and the negative electrode conductive component second end 842 is at least indirectly connected to the negative electrode of the battery pack 600.

In some embodiments, the negative electrode conductive component 840 includes a negative charging terminal 171 and a sub-negative electrode conductive component 843. The negative charging terminal 171 is provided on the charging socket 115, and is used to connect the negative electrode of the charging device, which is the first end 841 of the negative electrode conductive component. The sub-negative electrode conductive component 843 includes a sub-negative electrode conductive component first end 844 and a sub-negative electrode conductive component second end 845, the sub-negative electrode conductive component first end 844 is used to connect to the negative charging terminal 171, and the sub-negative electrode conductive component second end 845 is the negative electrode conductive component second end 842.

In some embodiments, the sub-negative conductive component 843 includes a first negative conductive component 126 and a second negative conductive component 92. The first negative conductive component 126 includes a first negative conductive component first end 126A and a first negative conductive component second end 126B. The first negative conductive component first end 126A is the sub-negative conductive component first end 844. The second negative conductive component 92 includes a second negative conductive component first end 92A and a second negative conductive component second end 92B. The second negative conductive component first end 92A is connected to the first negative conductive component second end 126B, and the second negative conductive component second end 92B is the sub-negative conductive component second end 845, that is, the negative conductive component second end 842.

The first end 126A of the first negative conductive member is connected to the negative charging terminal 171 to introduce the negative charging current. The second end 92B of the second negative conductive member is connected to the negative DC bus terminal 60, and then connected to the negative electrode of the battery pack 600 through the first connecting assembly 9. The first end 92A of the second negative conductive member is connected to the second end 126B of the first negative conductive member through the negative connecting terminal 70.

The following describes the connection between the power module 83 and the first capacitor 173 and the second capacitor 174 .

As shown in FIG14 , the power module 83 includes a three-phase terminal 84, a power module positive terminal 79, and a power module negative terminal 81. The three-phase terminal 84 is used to connect the first ends of the three-phase windings 701, respectively. The power module positive terminal 79 is used to at least indirectly connect the positive electrode (positive DC bus 807) of the battery pack 600. The power module negative terminal 81 is used to at least indirectly connect the negative electrode (negative DC bus 808) of the battery pack 600.

The first terminal block 99 of the controller 800 is connected to the motor terminal block 146 of the motor 700, realizing the connection between the three-phase bridge arm 803 of the power module 83 and the first end of the three-phase winding 701. The three-phase terminal 84 of the power module 83 is connected to the middle of the three-phase bridge arm 803 inside the power module. Inside the controller 800, the three-phase terminal 84 is connected to the first terminal block three-phase terminal 101 (see FIG. 3) of the first terminal block 99, and then connected to the three-phase winding 701 through the electric control three-phase line terminal 147 of the motor terminal block 146 and the motor three-phase line terminal 145.

As shown in FIG. 3 , FIG. 5 and FIG. 14 , in some embodiments, the controller 800 further includes a capacitor assembly 55. The first capacitor 173, the second capacitor 174, the first fuse 134, the second fuse 135 and the third fuse 133 are all disposed in the capacitor assembly 55. The positive DC bus support position 58A, the positive DC bus terminal 58, the A line support position 59, the negative DC bus support position 60A and the negative DC bus terminal 60 are also disposed in the capacitor assembly 55. The positive connection terminal 71 and the negative connection terminal 70 are also disposed in the capacitor assembly 55.

As shown in FIGS. 14 to 17 , in some embodiments, the capacitor assembly 55 includes an insulating base 911 and a first capacitor core 179, and the first capacitor core 179 is mounted on the insulating base 911. The first capacitor core 179 is the core of the first capacitor 173. An A-line support position 59 is provided on the insulating base 911. As described above, the A-line support position is at least used to support the first end 176A of the first A-line conductor segment. In some embodiments, the A-line support position 59 is also used to install (connect) the first A-line terminal 811 of the first connection assembly 9.

In some embodiments, the capacitor assembly 55 also includes a second capacitor core 181 , which is mounted on the insulating base 911 , and the second capacitor core 181 is the core of the second capacitor 174 .

In some embodiments, the capacitor assembly 55 also includes the aforementioned positive DC bus support position 58A and negative DC bus support position 60A. The positive DC bus terminal 58 is located at the positive DC bus support position 58A, and is used to connect the first positive DC bus terminal 821. The negative DC bus terminal 60 is located at the positive DC bus support position 58A, and is used to connect the first negative DC bus terminal 831. In some embodiments, the positive DC bus support position 58A, the A line support position 59 and the negative DC bus support position 60A are arranged in parallel, so as to facilitate connection with the first connection component 9. In some embodiments, the A line support position 59 is located at the positive DC bus support position 58A. In some embodiments, the A-line support 59, the positive DC bus support 58A and the negative DC bus support 60A are arranged close to the first socket 809 (i.e., the first socket 810), which is more convenient for improving the integration of the controller 800.

In some embodiments, the capacitor assembly 55 further includes a first capacitor positive electrode conductive sheet 901 and a capacitor negative electrode conductive sheet 905 .

In some embodiments, the capacitor assembly 55 also includes a second capacitor positive conductive sheet 903, which is used to connect to the first capacitor positive conductive sheet 901, including a second capacitor positive conductive sheet body 904, and a positive DC bus terminal 58 and a positive connection terminal 71 extending from the second capacitor positive conductive sheet body 904. Therefore, the second capacitor positive conductive sheet 903 as a whole is equipotential with the positive DC bus. As described above, the positive connection terminal 71 is used to at least indirectly connect the positive electrode of the charging device. The second capacitor positive conductive sheet body 904 is connected to the positive terminal of the second capacitor core 181.

In some embodiments, the first capacitor positive conductive sheet 901 includes a first capacitor positive input terminal 67, a capacitor positive output terminal 77, and a first capacitor positive conductive sheet body 902 located between the first capacitor positive input terminal 67 and the capacitor positive output terminal 77. The first capacitor positive conductive sheet body 902 is connected to the positive terminal of the first capacitor core 179.

In some embodiments, the second capacitor positive electrode conductive sheet 903 further includes a first fuse terminal 62 connected to the second capacitor positive electrode conductive sheet body 904. The first terminal of the first fuse 134 is connected to the first fuse terminal 62, and the second terminal of the first fuse 134 is connected to the first capacitor positive input terminal 67. Thus, the positive DC bus current is introduced from the second capacitor positive electrode conductive sheet 903, and enters the first capacitor 173 after passing through the first fuse 134. In some embodiments, the first fuse terminal 62 and the first capacitor positive input terminal 67 are located on the first side of the first capacitor core 179.

In some embodiments, the second capacitor positive electrode conductive sheet 903 further includes a second fuse terminal 63 connected to the second capacitor positive electrode conductive sheet body 904. The insulating base 911 is also provided with a second fuse output terminal 66. The first terminal of the second fuse 135 is connected to the second fuse terminal 63, and the second terminal of the second fuse 135 is connected to the second fuse output terminal 66. In some embodiments, the second fuse terminal 63 and the second fuse output terminal 66 are located on the first side of the first capacitor core 179. In some embodiments, the second fuse terminal 63 and the first fuse terminal 62 are located on the first side of the second capacitor positive electrode conductive sheet body 904.

In some embodiments, the capacitor negative electrode conductive sheet 905 includes a capacitor negative electrode input terminal 68, a capacitor negative electrode output terminal 75, and a capacitor negative electrode conductive sheet body 906 located between the capacitor negative electrode input terminal 68 and the capacitor negative electrode output terminal 75. In some embodiments, the capacitor negative electrode conductive sheet body 906 connects the negative terminal of the first capacitor core 179 and the negative terminal of the second capacitor core 181, so that the first capacitor 173 and the second capacitor 174 share the negative copper bar, that is, the negative terminal of the second capacitor core 181 is connected to the negative terminal of the first capacitor core 179. In some embodiments, the first terminal of the third fuse 133 is connected to the negative DC bus terminal 60, and the second terminal of the third fuse 133 is connected to the capacitor negative electrode input terminal 68. Therefore, the negative DC bus current enters the first capacitor 173 and the second capacitor 174 after passing through the third fuse 133. In some embodiments, the negative DC bus terminal 60 and the capacitor negative electrode input terminal 68 are located on the same side of the first capacitor core 179.

In some embodiments, the capacitor assembly 55 further includes a second capacitor positive input terminal 72, which is connected to the positive terminal of the second capacitor core 181. At the same time, as mentioned above, the second capacitor positive input terminal 72 is also used to connect the first end of the first switch element 122.

In some embodiments, the capacitor negative output terminal 75 and the capacitor positive output terminal 77 are used to connect to the power module 83. In some embodiments, the capacitor negative output terminal 75 and the capacitor positive output terminal 77 are located on the second side of the first capacitor core 179. In some embodiments, a capacitor insulator 76 is provided between the capacitor negative output terminal 75 and the capacitor positive output terminal 77. In some embodiments, the capacitor negative conductive sheet body 906 and the first capacitor positive conductive sheet body 902 are generally arranged parallel to each other, for example, both are arranged parallel to the first plane. The capacitor negative output terminal 75 and the capacitor positive output terminal 77 are also arranged parallel to the first plane. The capacitor insulator 76 is located between the capacitor negative output terminal 75 and the capacitor positive output terminal 77 in a direction perpendicular to the first plane. In some embodiments, the capacitor insulator 76 is made of a plastic material. For example, the capacitor insulator 76 is configured as a plastic sheet.

As shown in FIG. 14 , in some embodiments, the positive terminal 79 of the power module is used to connect to the positive output terminal 77 of the capacitor, thereby connecting to the positive DC bus terminal 58, that is, the positive DC bus, through the first positive conductive sheet 901 of the capacitor and the first fuse 134. Therefore, the positive DC bus terminal 58 is at least indirectly connected to the positive terminal 79 of the power module. One end of the first positive conductive sheet 901 of the capacitor is connected to the positive terminal 79 of the power module, and the other end of the first positive conductive sheet 901 of the capacitor is used to at least indirectly connect to the positive electrode of the battery pack 600. The negative terminal 81 of the power module is used to connect to the negative output terminal 75 of the capacitor, thereby connecting to the negative DC bus terminal 60, that is, the negative DC bus, through the negative conductive sheet 905 of the capacitor and the third fuse 133. Therefore, the negative DC bus terminal 60 is at least indirectly connected to the negative terminal 79 of the power module. One end of the capacitor negative electrode conductive sheet 905 is connected to the power module negative electrode terminal 81, and the other end of the capacitor negative electrode conductive sheet 905 is used to at least indirectly connect to the negative electrode of the battery pack 600. In some embodiments, the power module positive electrode terminal 79 and the power module negative electrode terminal 81 are located on the same side of the power module 83.

In some embodiments, as shown in FIG18 , the power module positive terminal 79 and the capacitor positive output terminal 77 are overlapped (contacted) with each other along an overlap direction DD. The overlap direction DD is the direction perpendicular to the contact surface between the power module positive terminal 79 and the capacitor positive output terminal 77 (that is, perpendicular to the aforementioned first plane). In some embodiments, the power module positive terminal 79 and the capacitor positive output terminal 77 are overlapped and welded with each other. The power module positive terminal 79 includes three sub-power module positive terminals 79A respectively connected to the first end (upper bridge 804) of the three-phase bridge arm 803, and the capacitor positive output terminal 77 is overlapped with the three sub-power module positive terminals 79A, so that the three sub-power module positive terminals 79A are connected at the input end. Together.

In some embodiments, as shown in FIG. 14 and FIG. 18 , the controller 800 further includes a conductive connecting piece 56, one end of the conductive connecting piece 56 is used to connect to the power module negative terminal 81, and the other end of the conductive connecting piece 56 is used to connect to the capacitor negative output terminal 75, thereby connecting the power module negative terminal 81 to the capacitor negative output terminal 75. For example, one end of the conductive connecting piece 56 is overlapped to the power module negative terminal 81 along the overlap direction DD, and the other end of the conductive connecting piece 56 is overlapped to the capacitor negative output terminal 75 along the overlap direction DD. Similarly, the power module negative terminal 81 includes three sub-power module negative terminals 81A respectively connected to the second end (lower bridge 805) of the three-phase bridge arm 803, and the conductive connecting piece 56 is overlapped and connected to the three sub-power module negative terminals 81A. In some embodiments, the conductive connecting piece 56 is used to overlap one end of the power module negative terminal 81 and is structured to have three mutually spaced overlapping positions 56A, and each overlapping position 56A corresponds to overlapping a sub-power module negative terminal 81A. In some embodiments, the conductive connecting piece 56 is welded to the power module negative terminal 81, for example, overlapped and welded. The conductive connecting piece 56 is welded to the capacitor negative output terminal 75, for example, overlapped and welded.

As shown in FIG. 18 , the positive terminal 79 of the power module exceeds (is longer than) the negative terminal 81 of the power module along the staggered direction DC. The positive output terminal 77 of the capacitor exceeds (is longer than) the negative output terminal 75 of the capacitor along the staggered direction DC. The positive terminal 79 of the power module and the positive output terminal 77 of the capacitor are stacked along the overlapping direction DD and staggered with each other along the staggered direction DC. Among them, the staggered direction DC is parallel to the aforementioned first plane, the overlapping direction DD is perpendicular to the staggered direction DC, the overlapping direction DD is perpendicular to the aforementioned first plane, and the overlapping direction DD is a bidirectional direction, including the first overlapping direction DD1 and the second overlapping direction DD2 opposite to each other. The positive terminal 79 of the power module is located on the side of the negative terminal 81 of the power module facing the first overlapping direction DD1, and is spaced apart from the negative terminal 81 of the power module along the overlapping direction DD. The positive output terminal 77 of the capacitor is located on the side of the negative output terminal 75 of the capacitor facing the first overlapping direction DD1, and is spaced apart from the negative output terminal 75 of the capacitor along the overlapping direction DD. The conductive connecting piece 56 is overlapped and connected to the power module negative terminal 81 on the side of the power module negative terminal 81 facing the second overlap direction DD2, and is overlapped and connected to the capacitor negative output terminal 75 on the side of the capacitor negative output terminal 75 facing the second overlap direction DD2.

In some embodiments, the power module positive terminal 79 and the power module negative terminal 81 are parallel to each other, for example, also parallel to the first plane. A power module insulating member 80 is arranged between the power module positive terminal 79 and the power module negative terminal 81, and the power module insulating member 80 is located between the power module positive terminal 79 and the power module negative terminal 81 along the overlapping direction DD.

In some embodiments, the power module insulating member 80 is configured to be bent toward the second overlapping direction and extend beyond the power module negative terminal 81 along the second overlapping direction DD2. Similarly, the capacitor insulating member 56 can also be configured to be bent toward the second overlapping direction and extend beyond the capacitor negative output terminal 75 along the second overlapping direction. In some embodiments, the middle portion of the conductive connecting piece 56 along the staggered direction DC is configured to be recessed toward the second overlapping direction DD2, and the two sides (or two ends) of the conductive connecting piece 56 along the staggered direction DC are respectively overlapped to the power module negative terminal 81 and the capacitor negative output terminal 75.

In some embodiments, the power module negative terminal 81 or the capacitor negative output terminal 75 is provided with a first positioning component 82, and the conductive connecting piece 56 is provided with a second positioning component 57. The first positioning component 82 is correspondingly arranged and connected to the second positioning component 57, so that after the conductive connecting piece 56 is overlapped and connected to one of the power module negative terminal 81 and the capacitor negative output terminal 75 provided with the first positioning component 82, the conductive connecting piece 56 cannot move relative to the one in a direction perpendicular to the overlapping direction DD, thereby ensuring the welding accuracy of the conductive connecting piece 56 and the one.

In some embodiments, the housing 10 is provided with installation positions for the power module 83 and the capacitor assembly 55. By design, after the power module 83 and the capacitor assembly 55 are installed in the housing 10, the positive terminal 79 of the power module and the positive output terminal 77 of the capacitor will form a relative position overlapping each other, and the relative position can be stably maintained under the limiting effect of their respective installation positions. At this time, the positive terminal 79 of the power module and the positive output terminal 77 of the capacitor can be welded and connected. Then, the conductive connecting piece 56 is welded and connected to the negative terminal 81 of the power module and the negative output terminal 75 of the capacitor respectively, and the first positioning component 82 and the second positioning component 57 are used to keep the conductive connecting piece 56 in a stable relative position relative to the negative terminal 81 of the power module and the negative output terminal 75 of the capacitor to ensure welding accuracy. In the present application, for example, laser welding is used, so that the welding accuracy and the safety of the welding process can be improved.

In some embodiments, the first positioning component 82 can also be simultaneously set to the power module negative terminal 81 and the capacitor negative output terminal 75, so that after the conductive connecting piece 56 is stacked and overlapped to the power module negative terminal 81 and the capacitor negative output terminal 75, it cannot move relative to the two in a direction perpendicular to the overlapping direction.

In some embodiments, the first positioning component 82 includes at least two first positioning sub-components, and the second positioning component 57 includes at least two second positioning sub-components, and the second positioning sub-components are correspondingly arranged and connected to the first positioning sub-components, so that the conductive connecting piece 56 cannot rotate relative to the power module negative terminal 81 and the capacitor negative output terminal 75. In some embodiments, one of the first positioning component 82 and the second positioning component 57 is configured as a protrusion, and the other of the first positioning component 82 and the second positioning component 57 is configured as a groove or a through hole for accommodating the protrusion.

In an embodiment not shown in the present application, compared with the illustrated embodiment, the difference is that the capacitor negative output terminal 75 and the capacitor positive output terminal 77 are set in opposite (swapped), the power module positive terminal 79 and the power module negative terminal 81 are set in opposite (swapped), the capacitor negative output terminal 75 and the power module negative terminal 81 are directly overlapped and welded, and the capacitor positive output terminal 77 and the power module positive terminal 79 are connected via a conductive connecting piece 56.

In some embodiments, the power module 83 includes a first power module terminal and a second power module terminal, the first power module terminal is one of the power module positive terminal 79 and the power module negative terminal 81, and the second power module terminal is the other of the power module positive terminal 79 and the power module negative terminal 81. The first power module terminal is connected to one end of the three-phase bridge arm 803, and the second power module terminal is connected to the other end of the three-phase bridge arm 803. In some embodiments, the first power module terminal and the second power module terminal are located on the same side of the power module 83.

In some embodiments, the capacitor assembly 55 includes a first capacitor terminal and a second capacitor terminal, the first capacitor terminal is used to correspond to the first power module terminal and connected to the first power module terminal (when the first power module terminal is the power module positive terminal 79, the first capacitor terminal is the capacitor positive output terminal 77; when the first power module terminal is the power module negative terminal 81, the first capacitor terminal is the capacitor negative output terminal 75), and the second capacitor terminal is used to correspond to the second power module terminal and connected to the second power module terminal (when the second power module terminal is the power module positive terminal 79, the second capacitor terminal is the capacitor positive output terminal 77; when the second power module terminal is the power module negative terminal 81, the second capacitor terminal is the capacitor negative output terminal 75). In some embodiments, the first capacitor terminal and the second capacitor terminal are located on the same side of the capacitor assembly 55. In some embodiments, the first power module terminal is directly overlapped and welded with the first capacitor terminal, and the second power module terminal is connected to the second capacitor terminal through a conductive connecting piece 56.

The controller according to the present application realizes the heating function of the battery by setting an A-line conductive component in the box body and connecting the second end of the motor winding to the middle of the first sub-battery pack and the second sub-battery pack connected in series. Boost charging is achieved by reusing the motor winding and part of the A-line conductive component. The controller has a reasonable structure and stable performance. It can be understood that the electric assembly, drive system and vehicle according to the present application include all the features and effects of the controller according to the present application.

The processes and steps described in all the above embodiments are only examples. Unless adverse effects occur, various processing operations can be performed in a sequence different from the sequence of the above processes. The sequence of steps in the above processes can also be increased, merged or deleted according to actual needs.

In understanding the scope of the present application, the term "comprising" and its derivatives as used herein are intended to be open terms, which specify the existence of the recorded features, elements, components, groups, wholes and/or steps, but do not exclude the existence of other unrecorded features, elements, components, groups, wholes and/or steps. This concept also applies to words with similar meanings, such as the terms "including", "having" and their derivatives.

The terms "attached" or "attached" as used herein include: a configuration where an element is directly secured to another element by directly securing the element to the other element; a configuration where an element is indirectly secured to another element by securing the element to an intermediate member which in turn is secured to the other element; and a configuration where one element is integral with the other element, i.e., one element is substantially a part of the other element. This definition also applies to words with similar meanings such as "connect," "connect," "couple," "mount," "bond," "fix," and their derivatives. Finally, terms of degree such as "substantially," "approximately," and "approximately" as used herein represent the amount of deviation that modifies the term such that the end result will not be significantly changed.

Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present application. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present application. The features described herein in one embodiment may be applied to another embodiment individually or in combination with other features, unless the feature is not applicable or otherwise specified in the other embodiment.

The present application has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the present application to the described embodiments. In addition, it can be understood by those skilled in the art that the present application is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present application, and these variations and modifications all fall within the scope of protection claimed by the present application.

Claims (14)

An energy conversion device, comprising: A first circuit module, at least for energy storage; a second circuit module, the second circuit module being at least used to control a temperature increase of the first circuit module; a first wire, the first wire being a positive wire, a second wire, the second wire being a negative wire, and a third wire, wherein the third wire, the first wire, the first circuit module and the second circuit module may form a first loop, and the third wire, the second wire, the first circuit module and the second circuit module may form a second loop; and A magnetic ring, wherein the first conductive wire, the second conductive wire and the third conductive wire are jointly passed through the magnetic ring. The energy conversion device according to claim 1, wherein the first circuit module comprises: A first sub-battery pack and a second sub-battery pack are arranged in series, a first end of the first wire is connected to the positive electrode of the first sub-battery pack, a first end of the second wire is connected to the negative electrode of the second sub-battery pack, and a first end of the third wire is connected between the first sub-battery pack and the second sub-battery pack. The energy conversion device according to claim 2, wherein the first circuit module further comprises a shell, the first sub-battery pack and the second sub-battery pack are disposed in the shell, and the magnetic ring is disposed in the shell. The energy conversion device according to claim 2 or 3, wherein the second circuit module comprises: A power module, the power module comprising at least one phase bridge arm, a positive electrode of the at least one phase bridge arm is connected to the second end of the first wire, and a negative electrode of the at least one phase bridge arm is connected to the second end of the second wire; An energy storage device, the energy storage device comprising at least one inductor; The first end of the inductor is connected to the midpoint of the one-phase bridge arm, and the second end of the inductor is connected to the second end of the third wire. The energy conversion device according to claim 4, wherein the power module comprises a three-phase bridge arm; The energy storage device comprises three inductors, the first ends of the three inductors are respectively connected to the midpoints of the bridge arms of the three phases, and the second ends of the three inductors are all connected to the second end of the third wire. The energy conversion device according to claim 2, wherein the second circuit module comprises: A power module, the power module comprising at least one phase bridge arm, a positive electrode of the at least one phase bridge arm is connected to the second end of the first wire, and a negative electrode of the at least one phase bridge arm is connected to the second end of the second wire; A box body, wherein the power module is arranged in the box body; At least part of the third wire is passed through the box. The energy conversion device according to claim 6, wherein the magnetic ring is arranged on the housing. The energy conversion device according to claim 6 or 7, wherein the second circuit module further comprises: An energy storage device, the energy storage device comprising: at least one inductor, a first end of the inductor connected to the midpoint of the one-phase bridge arm, and a second end of the inductor connected to the second end of the third wire; and A casing is connected to the box body, and at a connection point between the casing and the box body, the third wire is surrounded by at least one of the casing and the box body. The energy conversion device according to claim 8, wherein at a connection between the housing and the case, at least a portion of the third wire is surrounded by both the housing and the case. The energy conversion device according to claim 2, wherein the second circuit module comprises: A first energy storage device, wherein a first end of the first energy storage device is connected to the first wire, and a second end of the first energy storage device is connected to a second end of the third wire; A second energy storage device, wherein a first end of the second energy storage device is connected to the second wire, and a second end of the second energy storage device is connected to a second end of the third wire; a first switch, the first switch is used to control the first sub-battery pack, the first wire, the first energy storage device and the third wire to form a first battery pack discharge loop, the first battery pack discharge loop is used to discharge the first sub-battery pack; a second switch, the second switch being used to control the second sub-battery pack, the second wire, the second energy storage device and the third wire to form a second battery pack discharge loop, the second battery pack discharge loop being used to discharge the second sub-battery pack; a third switch, the third switch is used to control the first sub-battery pack, the first wire, the first energy storage device and the third wire to form a first battery pack charging circuit, The first battery pack charging circuit is used to charge the first sub-battery pack; and A fourth switch, the fourth switch is used to control the second sub-battery pack, the second wire, the second energy storage device and the third wire to form a second battery pack charging circuit, and the second battery pack charging circuit is used to charge the second sub-battery pack. The energy conversion device according to claim 10, wherein the first energy storage device comprises a first capacitor, and the first sub-battery pack, the first wire, the first capacitor, the first switch and the third wire form a first battery pack discharge loop; The second energy storage device includes a second capacitor, and the second sub-battery pack, a second wire, a second capacitor, a second switch and a third wire form a second battery pack discharge loop. The energy conversion device according to claim 11, wherein the second circuit module further comprises: A first energy storage inductor and a first diode, wherein the first energy storage inductor, the fifth switch, the first capacitor and the first diode form a first energy transfer loop; A second energy storage inductor and a second diode, wherein the second energy storage inductor, a sixth switch, a second capacitor and a second diode form a second energy transfer loop. The energy conversion device according to claim 12, wherein the first sub-battery pack, the third wire, the first energy storage inductor, the first diode, the first capacitor and the first wire form a charging loop for the first battery pack; The second sub-battery pack, the third wire, the second energy storage inductor, the second diode, the second capacitor and the second wire form a charging loop for the second battery pack. A vehicle comprising the energy conversion device according to any one of claims 1-13.