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CN117674335B - Power supply circuit, power supply control method, storage medium and vehicle - Google Patents

Power supply circuit, power supply control method, storage medium and vehicle Download PDF

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Publication number
CN117674335B
CN117674335B CN202211056937.1A CN202211056937A CN117674335B CN 117674335 B CN117674335 B CN 117674335B CN 202211056937 A CN202211056937 A CN 202211056937A CN 117674335 B CN117674335 B CN 117674335B
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CN
China
Prior art keywords
battery pack
control signal
current
bridge
inductor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202211056937.1A
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Chinese (zh)
Other versions
CN117674335A (en
Inventor
熊师
冯天宇
邓林旺
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BYD Co Ltd
Original Assignee
BYD Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BYD Co Ltd filed Critical BYD Co Ltd
Priority to CN202211056937.1A priority Critical patent/CN117674335B/en
Priority to PCT/CN2023/087950 priority patent/WO2023231592A1/en
Priority to JP2024552103A priority patent/JP2025513166A/en
Priority to EP23814786.2A priority patent/EP4470826A4/en
Priority to KR1020247031363A priority patent/KR20240154027A/en
Publication of CN117674335A publication Critical patent/CN117674335A/en
Application granted granted Critical
Publication of CN117674335B publication Critical patent/CN117674335B/en
Priority to US18/915,822 priority patent/US20250038557A1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H02J7/855—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/14—Arrangements for reducing ripples from DC input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1584—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • H02M3/1586—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

本公开提出了一种供电电路、供电控制方法、车辆和存储介质，供电电路包括：全桥电路，全桥电路包括第一桥臂和第二桥臂，第一桥臂和第二桥臂并联后跨接于第一电池包的正极与第二电池包的负极之间；第一电感，第一电感的一端与第一桥臂的中点相连，第一电感的另一端分别与第一电池包的负极和第二电池包的正极相连；第二电感，第二电感的一端与第二桥臂的中点相连，第二电感的另一端分别与第一电池包的负极和第二电池包的正极相连；控制器，控制器与全桥电路相连，控制器用于对全桥电路进行控制，以使第一电池包和/或第二电池包放电。该电路通过控制器对全桥电路的双桥臂进行错相控制，能够降低控制难度，提高供电可靠性，并可以减小电流纹波。

The present disclosure proposes a power supply circuit, a power supply control method, a vehicle and a storage medium. The power supply circuit includes: a full-bridge circuit, the full-bridge circuit includes a first bridge arm and a second bridge arm, the first bridge arm and the second bridge arm are connected in parallel and connected between the positive electrode of the first battery pack and the negative electrode of the second battery pack; a first inductor, one end of the first inductor is connected to the midpoint of the first bridge arm, and the other end of the first inductor is respectively connected to the negative electrode of the first battery pack and the positive electrode of the second battery pack; a second inductor, one end of the second inductor is connected to the midpoint of the second bridge arm, and the other end of the second inductor is respectively connected to the negative electrode of the first battery pack and the positive electrode of the second battery pack; a controller, the controller is connected to the full-bridge circuit, and the controller is used to control the full-bridge circuit to discharge the first battery pack and/or the second battery pack. The circuit controls the dual bridge arms of the full-bridge circuit in phase by the controller, which can reduce the control difficulty, improve the power supply reliability, and reduce the current ripple.

Description

Power supply circuit, power supply control method, storage medium, and vehicle
Technical Field
The present disclosure relates to the field of vehicle power supply technologies, and in particular, to a power supply circuit, a power supply control method, a computer readable storage medium, and a vehicle.
Background
In an electric automobile power supply system, a technical scheme that power is supplied by a double battery pack or even a plurality of battery packs is adopted. The bridge arm is generally assembled by a switch and an anti-parallel diode thereof, and a power supply loop is formed by connecting the bridge arm and an inductor in series. Because the inductance needs the freewheel, need to open the second branch road fast when first branch road disconnection, require extremely high to the switching operation, the control degree of difficulty is big.
In addition, the battery is charged and discharged frequently due to fluctuation of the inductor current in the switching period, so that the battery aging is accelerated. And if one of the two switches is damaged, the power supply system cannot work normally, and the power supply reliability is poor.
Disclosure of Invention
The present disclosure aims to solve, at least to some extent, one of the technical problems in the related art. Therefore, a first object of the present disclosure is to provide a power supply circuit, which performs phase-shifting control on a double bridge arm of a full bridge circuit through a control module, so as to reduce control difficulty, enable a second battery pack to continuously and stably supply power, improve power supply reliability, reduce current ripple, and avoid shortening of service life of a battery caused by frequent charging of the battery.
A second object of the present disclosure is to propose a power supply control method.
A third object of the present disclosure is to propose a computer readable storage medium.
A fourth object of the present disclosure is to propose a vehicle.
To achieve the above object, an embodiment of a first aspect of the present disclosure provides a power supply circuit, including: the full-bridge circuit comprises a first bridge arm and a second bridge arm, and the first bridge arm and the second bridge arm are connected in parallel and then connected between the positive electrode of the first battery pack and the negative electrode of the second battery pack in a bridging manner; one end of the first inductor is connected with the middle point of the first bridge arm, and the other end of the first inductor is respectively connected with the negative electrode of the first battery pack and the positive electrode of the second battery pack; one end of the second inductor is connected with the middle point of the second bridge arm, and the other end of the second inductor is respectively connected with the negative electrode of the first battery pack and the positive electrode of the second battery pack; and the controller is connected with the full-bridge circuit and is used for controlling the full-bridge circuit so as to discharge the first battery pack and/or the second battery pack.
According to the power supply circuit disclosed by the embodiment of the disclosure, the first battery pack and the second battery pack are connected in series to supply power for a load, the controller is used for carrying out phase-dislocation control on the double bridge arms of the full-bridge circuit, so that the first inductor and the second inductor can respectively store energy to boost the second battery pack, and the second battery pack can stably supply power for the load. Therefore, the circuit carries out phase-shifting control on the double bridge arms of the full-bridge circuit through the controller, so that the control difficulty can be reduced, the second battery pack can continuously and stably supply power, the power supply reliability is improved, the current ripple is reduced, and the shortening of the service life of the battery caused by frequent charging of the battery is avoided.
In addition, the power supply circuit according to the above embodiment of the present disclosure may further have the following additional technical features:
According to one embodiment of the present disclosure, the controller is specifically configured to: controlling the full-bridge circuit to be in a stop working state so as to enable the first battery pack and the second battery pack to be powered in series; or the full-bridge circuit is controlled to be in an operating state so as to enable the first battery pack and/or the second battery pack to supply power.
According to one embodiment of the present disclosure, the power supply circuit further includes: the current sampling circuit is used for acquiring the current of the first battery pack and/or the current of the second battery pack and the currents of the first inductor and the second inductor; and the controller is used for controlling the full-bridge circuit based on the acquired current so as to enable the first battery pack and/or the second battery pack to supply power.
According to one embodiment of the present disclosure, a controller includes: a first signal generating unit for generating a first control signal and a second control signal which are complementary according to a first current difference value between a preset reference current and a current of the first battery pack and/or a current of the second battery pack; a second signal generating unit for generating complementary third and fourth control signals according to a second current difference between the current of the first inductor and the current of the second inductor; and the control unit is used for controlling the full-bridge circuit according to the first control signal, the second control signal, the third control signal and the fourth control signal.
According to one embodiment of the present disclosure, the first signal generating unit includes: the device comprises a first subtracter, a first regulator, a first signal generator and a first inverter, wherein the first subtracter is used for acquiring a first current difference value between a preset reference current and the current of a first battery pack or the current of a second battery pack; the first regulator is used for carrying out proportional integral regulation on the first current difference value to obtain a first given value; the first signal generator is used for generating a first control signal according to a first given value and a first preset signal; the first inverter is used for inverting the first control signal to obtain a second control signal; the second signal generation unit includes: the second subtracter is used for acquiring a second current difference value between the current of the first inductor and the current of the second inductor; the second regulator is used for carrying out proportional integral regulation on the second current difference value to obtain a second given value; the second signal generator is used for generating a third control signal according to the second given value and a second preset signal; the second inverter is used for inverting the third control signal to obtain a fourth control signal; wherein the first preset signal and the second preset signal are misphased by half a period.
According to one embodiment of the present disclosure, a current sampling circuit obtains a current of a second battery pack while discharging a first battery pack; the current sampling circuit acquires a current of the first battery pack when discharging the second battery pack.
According to one embodiment of the disclosure, the first bridge arm includes a first upper bridge switching tube and a first lower bridge switching tube, one end of the first upper bridge switching tube is connected with the positive electrode of the first battery pack, the other end of the first upper bridge switching tube is connected with one end of the first lower bridge switching tube and is provided with a first connection point, the other end of the first lower bridge switching tube is connected with the negative electrode of the second battery pack, and the first connection point is connected with one end of the first inductor; the second bridge arm comprises a second upper bridge switching tube and a second lower bridge switching tube, one end of the second upper bridge switching tube is connected with the positive electrode of the first battery pack, the other end of the second upper bridge switching tube is connected with one end of the second lower bridge switching tube and is provided with a second connection point, the other end of the second lower bridge switching tube is connected with the negative electrode of the second battery pack, and the second connection point is connected with one end of the second inductor.
According to one embodiment of the present disclosure, the first upper bridge switching tube, the first lower bridge switching tube, the second upper bridge switching tube, and the second lower bridge switching tube are each provided with an anti-parallel diode.
According to one embodiment of the present disclosure, the control unit: the first upper bridge switching tube of the first bridge arm is controlled according to the first control signal, and the first lower bridge switching tube of the first bridge arm is controlled according to the second control signal; and controlling a second upper bridge switching tube of the second bridge arm according to the third control signal, and controlling a second lower bridge switching tube of the second bridge arm according to the fourth control signal.
According to one embodiment of the present disclosure, the control unit: and under the condition that the first bridge arm fails, controlling a second upper bridge switching tube of the second bridge arm according to the first control signal, and controlling a second lower bridge switching tube of the second bridge arm according to the second control signal.
According to one embodiment of the present disclosure, the power supply circuit further includes: the filter inductor is connected in series between the positive electrode of the first battery pack and the full-bridge circuit, and the filter capacitor is connected in parallel with the first battery pack.
According to one embodiment of the present disclosure, the power supply circuit further includes: and the bus capacitor is connected with the first bridge arm and the second bridge arm in parallel.
According to one embodiment of the present disclosure, the first battery pack is a power type battery pack, and the second battery pack is an energy type battery pack; or the first battery pack is an energy type battery pack, and the second battery pack is a power type battery pack.
To achieve the above object, an embodiment of a second aspect of the present disclosure provides a power supply control method, which is applied to the above power supply circuit, and the method includes: acquiring current of a first battery pack and/or a second battery pack and current of a first inductor and a second inductor; the full bridge circuit is controlled based on the obtained current to power the first battery pack and/or the second battery pack.
According to the power supply control method of the embodiment of the disclosure, the current of the first battery pack and/or the second battery pack and the current of the first inductor and the second inductor are obtained, and a control signal is generated based on the obtained current so as to perform phase-dislocation control on the full-bridge circuit. Therefore, the method can carry out phase-shifting control on the double bridge arms of the full-bridge circuit, can reduce control difficulty, enables the second battery pack to continuously and stably supply power, improves power supply reliability, reduces current ripple, and avoids shortening of service life of the battery caused by frequent charging of the battery.
In addition, the power supply control method according to the above embodiment of the present disclosure may further have the following additional technical features:
According to one embodiment of the present disclosure, controlling a full bridge circuit based on a current drawn to power a first battery pack and/or a second battery pack includes: acquiring a first current difference value between a preset reference current and the current of the first battery pack or the current of the second battery pack, and generating a first control signal and a second control signal which are complementary according to the first current difference value; acquiring a second current difference value between the current of the first inductor and the current of the second inductor, and generating a third control signal and a fourth control signal which are complementary according to the second current difference value; and controlling the full-bridge circuit according to the first control signal, the second control signal, the third control signal and the fourth control signal.
According to one embodiment of the present disclosure, generating complementary first and second control signals from a first current difference value includes: proportional integral adjustment is carried out on the first current difference value to obtain a first given value, a first control signal is generated according to the first given value and a first preset signal, and the first control signal is inverted to obtain a second control signal; and carrying out proportional integral regulation on the second current difference value to obtain a second given value, generating a third control signal according to the second given value and a second preset signal, and inverting the third control signal to obtain a fourth control signal, wherein the first preset signal and the second preset signal are out of phase by half period.
According to one embodiment of the present disclosure, controlling a full bridge circuit according to a first control signal, a second control signal, a third control signal, and a fourth control signal includes: the first upper bridge switching tube of the first bridge arm is controlled according to the first control signal, and the first lower bridge switching tube of the first bridge arm is controlled according to the second control signal; under the condition that the first bridge arm is normal, controlling a second upper bridge switching tube of the second bridge arm according to a third control signal, and controlling a second lower bridge switching tube of the second bridge arm according to a fourth control signal; and under the condition that the first bridge arm fails, controlling a second upper bridge switching tube of the second bridge arm according to the first control signal, and controlling a second lower bridge switching tube of the second bridge arm according to the second control signal.
To achieve the above object, a third aspect of the present disclosure provides a computer-readable storage medium having stored thereon a power supply control program which, when executed by a processor, implements the power supply control method described above.
According to the computer readable storage medium disclosed by the embodiment of the disclosure, by executing the power supply control method, the double bridge arms of the full-bridge circuit can be subjected to phase-misplacement control, so that the control difficulty can be reduced, the second battery pack continuously and stably supplies power, the power supply reliability is improved, the current ripple is reduced, and the shortening of the service life of the battery caused by frequent battery charging is avoided.
To achieve the above object, a fourth aspect of the present disclosure provides a vehicle, including: the power supply circuit is used for supplying power to the vehicle.
According to the vehicle disclosed by the embodiment of the disclosure, through the power supply circuit, the second battery pack can continuously and stably supply power, so that the power supply reliability is improved, the current ripple can be reduced, and the shortening of the service life of the battery caused by frequent charging of the battery is avoided.
Additional aspects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.
Drawings
FIG. 1 is a circuit topology of a power supply circuit according to an embodiment of the present disclosure;
FIG. 2 is a circuit topology of a power supply circuit according to one embodiment of the present disclosure;
FIG. 3 is a block schematic diagram of a controller according to one embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a control signal generation process according to one embodiment of the present disclosure;
FIG. 5 is a circuit topology of a power supply circuit according to one embodiment of the present disclosure;
FIG. 6 is a flow chart of a power control method according to an embodiment of the present disclosure;
fig. 7 is a block schematic diagram of a vehicle according to an embodiment of the disclosure.
Reference numerals:
A power supply circuit 100,
First battery pack 110, second battery pack 120, current sampling circuit 140,
Full bridge circuit 131, first inductor L1, second inductor L2, controller 132, filter inductor L3, filter capacitor C1, bus capacitor C2
First bridge arm 1311, second bridge arm 1312, first upper bridge switching tube M1, first lower bridge switching tube M2, first connection point J1, second upper bridge switching tube M3, second lower bridge switching tube M4, second connection point J2, first signal generation unit 1321, second signal generation unit 1322, control unit 1323, second upper bridge switching tube M3, second upper bridge switching tube M4, second upper bridge switching tube M3, third upper bridge switching tube M3, first upper bridge switching tube M4, second upper bridge switching tube M3, first upper bridge switching tube M3, second upper bridge switching tube M4, and first upper bridge switching tube M3,
A first subtracter A1, a first regulator B1, a first signal generator P1, a first inverter N1, a second subtracter A2, a second regulator B2, a second signal generator P2, and a second inverter N2
Detailed Description
Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present disclosure and are not to be construed as limiting the present disclosure.
The power supply circuit, the power supply control method, the computer-readable storage medium, and the vehicle proposed by the embodiments of the present disclosure are described below with reference to the accompanying drawings.
Fig. 1 is a circuit topology diagram of a power supply circuit according to an embodiment of the present disclosure.
As shown in fig. 1, a power supply circuit 100 of an embodiment of the present disclosure may include: the full bridge circuit 131, the first inductor L1, the second inductor L2 and the controller 132.
The full-bridge circuit 131 includes a first bridge arm 1311 and a second bridge arm 1312, where the first bridge arm 1311 and the second bridge arm 1312 are connected in parallel and then connected across between the positive electrode of the first battery pack 110 and the negative electrode of the second battery pack 120. One end of the first inductor L1 is connected to a midpoint of the first bridge arm 1311, and the other end of the first inductor L1 is connected to the negative electrode of the first battery pack 110 and the positive electrode of the second battery pack 120, respectively. One end of the second inductor L2 is connected to a midpoint of the second bridge arm 1312, and the other end of the second inductor L2 is connected to the negative electrode of the first battery pack 110 and the positive electrode of the second battery pack 120, respectively. The controller 132 is connected to the full-bridge circuit 131, and the controller 131 is configured to control the full-bridge circuit 131 to discharge the first battery pack 110 and/or the second battery pack 120.
According to one embodiment of the present disclosure, the controller 132 is specifically configured to: the full-bridge circuit 131 is controlled to be in a stop working state, so that the first battery pack 110 and the second battery pack 120 are powered in series; or controls the full-bridge circuit 131 to be in an operating state so that the first battery pack 110 and/or the second battery pack 120 is powered.
Specifically, as shown in fig. 1, when the controller 132 controls the full-bridge circuit 131 to be in a stopped state, the first battery pack 110 and the second battery pack 120 are discharged in series to supply power to the load. When the controller 132 controls the full-bridge circuit 131 to be in an operating state, the first bridge arm 1311 and the second bridge arm 1312 of the full-bridge circuit 131 are alternately in an operating state. When the first bridge arm 1311 is in a working state, the upper bridge arm and the lower bridge arm of the first bridge arm 1311 are alternately conducted, the controller 132 controls the upper bridge arm of the first bridge arm 1311 to be turned off and the lower bridge arm to be turned on in a first preset time, the second battery pack 120 charges the first inductor L1, and controls the upper bridge arm of the first bridge arm 1311 to be turned on and the lower bridge arm to be turned off in a second preset time, the first inductor L1 releases stored electric energy to supply power to a load, so that the first inductor L1 realizes a boosting function, at this time, the electric energy provided by the first battery pack 110 for the load is reduced, and the output current is reduced. In the same principle, when the second bridge arm 1312 is in the working state, the controller 132 controls the upper bridge arm of the second bridge arm 1312 to be turned off and the lower bridge arm to be turned on, the second battery pack 120 charges the second inductor L2, and when the upper bridge arm of the second bridge arm 1312 is controlled to be turned on and the lower bridge arm of the second bridge arm 1312 is controlled to be turned off, the second inductor L2 releases stored electric energy to supply power for the load, so that the second inductor L2 realizes the boosting function. During the process of charging the first inductor L1 or the second inductor L2 by the second battery pack 120, the power supply circuit 100 supplies power to the load only by the first battery pack 110. The process is repeated, when the voltage of the output end (the end connected to the first bridge arm 1311) of the first inductor L1 or the output end (the end connected to the second bridge arm 1312) of the second inductor L2 rises to be the same as the bus voltage, the first battery pack 110 is opened, the output current of the first battery pack 110 becomes zero, at this time, the power supply circuit 100 only supplies power to the load by the second battery pack 120, and the output power when the second battery pack 120 discharges is higher than the power that the second battery pack 120 can output by itself. Thus, the load can be stably supplied with power and the second battery pack 120 is in a continuously discharged state, so that current ripple can be reduced.
When one of the bridge arms of the full-bridge circuit 131 fails, for example, the first bridge arm 1311 fails, energy can be stored through the second inductor L2 and the second bridge arm 1312, and the second battery pack 120 is boosted to supply power to the load, thereby improving the reliability of the power supply circuit 100.
Therefore, the power supply circuit disclosed by the embodiment of the disclosure performs phase-dislocation control on the double bridge arms of the full-bridge circuit through the controller, so that the control difficulty can be reduced, the second battery pack can continuously and stably supply power, the power supply reliability is improved, the current ripple can be reduced, and the shortening of the service life of the battery caused by frequent charging of the battery is avoided.
According to one embodiment of the present disclosure, as shown in fig. 2, the power supply circuit 100 further includes: the current sampling circuit 140, the current sampling circuit 140 is configured to obtain a current of the first battery pack 110 and/or a current of the second battery pack 120, and a current of the first inductor L1 and the second inductor L2; the controller 132 controls the full-bridge circuit 131 based on the acquired current to supply power to the first battery pack 110 and/or the second battery pack 120. The current sampling circuit 140 may be composed of a current sensor disposed in the circuit, and the current sensor may collect the current of each branch, such as the first battery pack 110, the second battery pack 120, the first inductor L1, and the second inductor L2.
According to one embodiment of the present disclosure, the current sampling circuit 140 obtains the current of the second battery pack 120 while discharging the first battery pack 110; when discharging the second battery pack 120, the current sampling circuit 140 acquires the current of the first battery pack 110.
That is, the current sampling circuit 140 collects the current of the second battery pack 120 while discharging the first battery pack 110; the current sampling circuit collects the current of the first battery pack 110 when discharging the second battery pack 120. After obtaining the current of the first battery pack 110 and/or the current of the second battery pack 120 and the currents of the first inductor L1 and the second inductor L2, the current sampling circuit 140 transmits these current values to the controller 132, the controller 132 generates a control signal according to the current of the first battery pack 110 and/or the current of the second battery pack 120 and the currents of the first inductor L1 and the second inductor L2, and the controller 132 controls the first bridge arm 1311 and the second bridge arm 1312 of the full bridge circuit 131 to be in an alternate working state according to the control signal, so that the first inductor L1 and the second inductor L2 are alternately charged and discharged, thereby realizing continuous boost of the second battery pack 120.
According to one embodiment of the present disclosure, as shown in fig. 3, the controller 132 includes: a first signal generation unit 1321, a second signal generation unit 1322, and a control unit 1323. Wherein the first signal generating unit 1321 is configured to generate a first control signal and a second control signal that are complementary according to a first current difference between a preset reference current and a current of the first battery pack 110 and/or a current of the second battery pack 120; the second signal generating unit 1322 is configured to generate a third control signal and a fourth control signal according to a second current difference between the current of the first inductor L1 and the current of the second inductor L2; the control unit 1323 is configured to control the full-bridge circuit 131 according to the first control signal, the second control signal, the third control signal, and the fourth control signal.
According to one embodiment of the present disclosure, as shown in fig. 4, the first signal generating unit 1321 includes: a first subtractor A1, a first regulator B1, a first signal generator P1, and a first inverter N1, where the first subtractor A1 is configured to obtain a first current difference between a preset reference current and a current of the first battery pack 110 or a current of the second battery pack 120; the first regulator B1 is used for performing Proportional Integral (PI) regulation on the first current difference value to obtain a first given value; the first signal generator P1 is configured to generate a first control signal according to a first given value and a first preset signal; the first inverter N1 is used for inverting the first control signal to obtain a second control signal; the second signal generating unit 1322 includes: a second subtractor A2, a second regulator B2, a second signal generator P2, and a second inverter N2, where the second subtractor A2 is configured to obtain a second current difference between the current of the first inductor L1 and the current of the second inductor L2; the second regulator B2 is used for performing Proportional Integral (PI) regulation on the second current difference value to obtain a second given value; the second signal generator P2 is configured to generate a third control signal according to the second given value and a second preset signal; the second inverter N2 is used for inverting the third control signal to obtain a fourth control signal; wherein the first preset signal and the second preset signal are misphased by half a period. The first preset signal and the second preset signal may be saw-tooth wave signals, where the minimum value of the saw-tooth wave signals is 0 and the maximum value of the saw-tooth wave signals is 1.
Specifically, as shown in fig. 4, the current sampling circuit 140 respectively collects the current of the first battery pack 110 and/or the current of the second battery pack 120, the current L1 of the first inductor L1 and the current L2 of the second inductor L2 in real time, so as to obtain the current I of the first battery pack 110 or the current I1 of the first inductor L1 and the current I2 of the second inductor L2, input the preset reference current Iref and the current I of the first battery pack 110 or the current I of the second battery pack 120 into the first subtractor A1 to perform difference, obtain a first current difference Δi1, and perform PI adjustment on the first current difference Δi1 by taking the first current difference Δi1 as the input of the first adjuster B1, so as to obtain a first given value, wherein the first given value is a fluctuating value between 0 and 1. The first set value and the value of the first preset signal STW1 are input into the first signal generator P1 for size comparison, if the first set value is larger than the value of the first preset signal STW1, the first signal generator P1 outputs 1, otherwise, outputs 0, and thus the first control signal PWM1 with the waveform of a square wave is obtained. The first control signal PWM1 is inverted by the first inverter N1, and the second control signal PWM2 can be obtained.
And inputting the current I1 of the first inductor and the current I2 of the second inductor into a second subtracter A2 for difference to obtain a second difference value delta I2, and taking the second difference value delta I2 as the input of a second regulator B2 for PI regulation to obtain a second given value, wherein the second given value is a fluctuating value between 0 and 1. The second set value is input into the second signal generator P2 to be compared with the value of the second preset signal STW2, if the second set value is larger than the value of the second preset signal STW2, the second signal generator P2 outputs 1, otherwise, outputs 0, so that a third control signal PWM3 with a square wave waveform is obtained. The third control signal PWM3 is inverted by the second inverter N2, and the fourth control signal PWM4 can be obtained. Because the first preset signal STW1 and the second preset signal STW2 are phase-shifted by half a period, the first control signal PWM1 and the second control signal PWM2 are phase-shifted by half a period with the third control signal PWM3 and the fourth control signal PWM4, thereby realizing the alternating control of the first arm 1311 and the second arm 1312 of the full bridge circuit 131.
According to one embodiment of the present disclosure, as shown in fig. 5, the first bridge arm 1311 includes a first upper bridge switching tube M1 and a first lower bridge switching tube M2, one end of the first upper bridge switching tube M1 is connected to the positive electrode of the first battery pack 110, the other end of the first upper bridge switching tube M1 is connected to one end of the first lower bridge switching tube M2 and forms a first connection point J1, the other end of the first lower bridge switching tube M2 is connected to the negative electrode of the second battery pack 120, and the first connection point J1 is connected to one end of the first inductor L1; the second bridge arm 1312 includes a second upper bridge switching tube M3 and a second lower bridge switching tube M4, one end of the second upper bridge switching tube M3 is connected with the positive electrode of the first battery pack 110, the other end of the second upper bridge switching tube M3 is connected with one end of the second lower bridge switching tube M4 and is formed with a second connection point J2, the other end of the second lower bridge switching tube M4 is connected with the negative electrode of the second battery pack 120, and the second connection point J2 is connected with one end of the second inductor L2.
According to one embodiment of the present disclosure, the control unit 1323: the first upper bridge switching tube M1 of the first bridge arm 1311 is controlled according to the first control signal, and the first lower bridge switching tube M2 of the first bridge arm 1311 is controlled according to the second control signal; the second upper bridge switching tube M3 of the second bridge arm 1312 is controlled according to the third control signal, and the second lower bridge switching tube M4 of the second bridge arm 1312 is controlled according to the fourth control signal.
Specifically, as shown in fig. 5, the current sampling circuit 140 may collect the current of the first battery pack 110 and/or the current of the second battery pack 120, the current of the first inductor L1 and the current of the second inductor L2, and the controller 132 may generate PWM control signals corresponding to the first upper bridge switching tube M1, the first lower bridge switching tube M2, the second upper bridge switching tube M3 and the second lower bridge switching tube M4 according to the current of the first battery pack 10 or the current of the second battery pack 120, and the current of the first inductor L1 and the current of the second inductor L2, respectively. The controller 132 outputs a pair of control signals corresponding to each switching tube to the control end of each switching tube, so as to control each switching tube to be turned on or turned off. It should be understood that if two switching tubes on the same bridge arm are simultaneously turned on, and the bridge arm is in a through state, the power supply circuit 100 will be in a short-circuit state, and the first battery pack 110 and the second battery pack 120 will be damaged, so that the first upper bridge switching tube M1 and the first lower bridge switching tube M2 cannot be simultaneously turned on, and the second upper bridge switching tube M3 and the second lower bridge switching tube M4 cannot be simultaneously turned on, so that the first control signal corresponding to the first upper bridge switching tube M1 and the second control signal corresponding to the first lower bridge switching tube M2 are opposite, the third control signal corresponding to the second upper bridge switching tube M3 and the fourth control signal corresponding to the second lower bridge switching tube M4 are opposite, and the first control signal corresponding to the first upper bridge switching tube M1 and the third control signal corresponding to the second upper bridge switching tube M3 are wrong by half a period.
When the controller 132 controls the full-bridge circuit 131 to be in an operating state, the first bridge arm 1311 and the second bridge arm 1312 of the full-bridge circuit 131 are alternately in an operating state. The control unit 1323 controls the first upper bridge switching tube M1 to be turned on according to the first control signal, and controls the first lower bridge switching tube M2 to be turned off according to the second control signal, so that the electric energy stored in the first inductor L1 is released, and the second battery pack 120 is boosted to supply power to the load; after a half period, the control unit 1323 controls the first upper bridge switching tube M1 to be turned off according to the first control signal, controls the first lower bridge switching tube M2 to be turned on according to the second control signal, and the second battery pack 120, the first inductor L1 and the first lower bridge switching tube M2 form a loop to charge the first inductor L1, meanwhile, the third control signal controls the second upper bridge switching tube M3 to be turned on, and the fourth control signal controls the second lower bridge switching tube M4 to be turned off, so that the electric energy stored by the second inductor L2 is released, and the second battery pack 120 is boosted to supply power to the load; after the half period is continued, the third control signal controls the second upper bridge switching tube M3 to be turned off, the fourth control signal controls the second lower bridge switching tube M4 to be turned on, the second battery pack 120, the second inductor L2 and the second lower bridge switching tube M4 form a loop so as to charge the second inductor L2, meanwhile, the first control signal controls the first upper bridge switching tube M1 to be turned on, and the second control signal controls the first lower bridge switching tube M2 to be turned off, so that the first inductor L1 supplies power to a load, and the loop is formed.
According to one embodiment of the present disclosure, the control unit 1323: when the first bridge arm 1311 fails, the second upper bridge switching tube M3 of the second bridge arm 1312 is controlled according to the first control signal, and the second lower bridge switching tube M4 of the second bridge arm 1312 is controlled according to the second control signal.
Specifically, when the first bridge arm 1311 fails, the first inductor L1 cannot supply power to the load, and at this time, the current I1 of the first inductor L1 is zero, so that the third control signal and the fourth control signal cannot be accurately and reasonably obtained, and the control unit 1323 may control the second upper bridge switching tube M3 of the second bridge arm 1312 according to the first control signal, and control the second lower bridge switching tube M4 of the second bridge arm 1312 according to the second control signal, which specifically includes: the control unit 1323 controls the second upper bridge switching tube M3 to be turned on according to the first control signal PWM1, and simultaneously controls the second lower bridge switching tube to be turned off according to the second control signal PWM2, so that the electric energy stored in the second inductor L2 is released, and the second battery pack 120 is boosted to supply power to the load; after a half period, the control unit 1323 controls the second upper bridge switching tube M3 to be turned off according to the first control signal PWM1, and controls the second lower bridge switching tube M4 to be turned on according to the second control signal PWM2, and the second battery pack 120, the second inductor L2, and the second lower bridge switching tube M4 form a loop to charge the second inductor L2; after a half period, the control unit 1323 controls the second upper bridge switching tube M3 to be turned on according to the first control signal PWM1, and simultaneously controls the second lower bridge switching tube M4 to be turned off according to the second control signal PWM2, so that the electric energy stored in the second inductor L2 is released, and the second battery pack 120 is boosted to supply power to the load, so that the cycle is circulated.
According to one embodiment of the present disclosure, as shown in fig. 5, the first upper bridge switching tube M1, the first lower bridge switching tube M2, the second upper bridge switching tube M3, and the second lower bridge switching tube M4 are all provided with anti-parallel diodes.
Specifically, during the normal power supply process of the power supply circuit 100 for the load, the first upper bridge switching tube M1 and the first lower bridge switching tube M2 are turned on and off in sequence, and the second upper bridge switching tube M3 and the second lower bridge switching tube M4 are turned on and off in sequence. If two switching tubes on the same leg are simultaneously conducting, which leg is in a pass-through state, the supply circuit 100 will be in a short-circuit state, and thus this state should be avoided. However, the switching tubes in the bridge arm are not ideal devices, the on time and the off time of the switching tubes are not strictly consistent, in order to avoid the bridge arm direct connection, the dead time is usually set, one switching tube in the bridge arm is controlled to be turned off first, and then the other switching tube is turned on when the dead time is finished, so that the phenomenon of the bridge arm direct connection can be avoided. Because the switching tubes of the same bridge arm are in the off state in the dead time, the electric energy stored in the inductor can cause high-voltage impact on the switching tubes, and the switching tubes are damaged. The diodes which are reversely connected in parallel in each switching tube in the bridge arm carry out follow current in dead time, so that the damage of the switching tubes can be avoided.
For example, as shown in fig. 5, when the controller 132 controls the first upper bridge switching tube M1 to change from the off state to the on state, the first lower bridge switching tube M2 is controlled to change from the on state to the off state, the first upper bridge switching tube M1 and the first lower bridge switching tube M2 are both in the off state during the dead time, the electric energy stored in the first inductor L1 is freewheeled through the anti-parallel diode D1 of the first upper bridge switching tube M1 to supply power to the load, after the dead time is over, the first upper bridge switching tube M1 is changed from the off state to the on state, and the first inductor L1 supplies power to the load through the first upper bridge switching tube M1. During the process of controlling the second upper bridge switching tube M3 to be changed from the off state to the on state, the electric energy stored in the second inductor L2 is subjected to follow current through the anti-parallel diode D3 of the second upper bridge switching tube M3. Based on the same principle, when the first battery pack 110 and the second battery pack 120 are charged, the anti-parallel diode D3 of the first lower bridge switching tube M2 and the anti-parallel diode D4 of the second lower bridge switching tube M4 are used for freewheeling, so that the impact of high voltage on the first lower bridge switching tube M2 and the second lower bridge switching tube M4 can be avoided. The specific principle is the same as that of supplying power to the load, and will not be described again here.
It should be noted that, for ease of understanding, the switching transistors in fig. 1, 2 and 5 are all illustrated as MOSFETs (Metal Oxide Semiconductor FIELD EFFECT transistors), and not to be construed as limiting the disclosure, and in the embodiments of the disclosure, the switching transistors may be power switching transistors, MOSFETs, IGBTs (Insulated Gate Bipolar Transistor, insulated gate bipolar transistors), siC (silicon carbide) or other components having on-off functions.
According to one embodiment of the present disclosure, as shown in fig. 5, the power supply circuit 100 further includes: the filter inductor L3 and the filter capacitor C1, the filter inductor L3 is connected in series between the positive electrode of the first battery pack 110 and the full bridge circuit 131, and the filter capacitor C1 is connected in parallel with the first battery pack 110. The high-frequency component in the power supply current can be filtered through the filter inductor L3, so that the power supply quality of a load is improved; through the filter capacitor C1, the output voltage of the first battery pack 110 can be filtered, so that the output voltage of the first battery pack 110 is smooth and stable, the current ripple of the first battery pack 110 can be restrained, the fluctuation of the output current of the first battery pack 110 near zero is avoided, the rapid charging and discharging of the first battery pack 110 at high frequency can be avoided, the problem of the reduction of the service life of the first battery pack 110 is avoided, and the purpose of prolonging the service life of the battery pack is achieved.
According to one embodiment of the present disclosure, as shown in fig. 5, the power supply circuit 100 further includes: bus capacitor C2, bus capacitor C2 is connected in parallel with first arm 1311 and second arm 1312.
Specifically, after the first bridge arm 1311 and the second bridge arm 1312 boost or buck, on one hand, the fluctuation of the power supply voltage of the power supply circuit 100 can be filtered through the bus capacitor C2, so that the voltage provided by the power supply circuit 100 to the load is stable, and the power supply quality of the load is ensured; on the other hand, the negative influence of the voltage fluctuation generated by the first battery pack 110, the first inductor L1 and the second inductor L2 on the second battery pack 120 can be reduced.
In one embodiment of the present disclosure, the first battery pack 110 is a power type battery pack and the second battery pack 120 is an energy type battery pack; or the first battery pack 110 is an energy type battery pack and the second battery pack 120 is a power type battery pack. In the embodiments of the present disclosure, the power type battery pack is designated as a battery pack having high power density. Wherein the power density designation is: maximum power per unit weight or volume of battery for energy transfer during charge and discharge. In the embodiment of the disclosure, the voltage value of the power battery pack can be set in the range of 100-1000V. The energy type battery pack is a battery pack having a high energy density. Wherein the energy density designation is: the energy stored by the battery per unit weight or volume. In the embodiment of the disclosure, the voltage value of the energy type battery pack can be set in the range of 100-1000V. Since the power pack is generally used in a case where peak power is generated during traveling of an electric vehicle or a hybrid vehicle (e.g., discharge peak power generated during traction, charge peak power generated during braking), it is not used in other cases. Therefore, in other cases, the output current of the power type battery pack is desirably 0.
It should be noted that, in the embodiment of the present disclosure, specific types of the first battery pack 110 and the second battery pack 120 are not limited, and compatibility of the battery circuit 100 provided in the embodiment of the present disclosure may be improved.
In summary, according to the power supply circuit of the embodiment of the disclosure, the first battery pack and the second battery pack are connected in series to supply power to the load, and the controller is used for performing phase-dislocation control on the double bridge arms of the full-bridge circuit, so that the control difficulty can be reduced, the first inductor and the second inductor can be respectively used for storing energy, so as to boost the second battery pack, and the second battery pack can be used for stably supplying power to the load. Therefore, the circuit can enable the second battery pack to continuously and stably supply power through the control of the controller to the full-bridge circuit, improve the power supply reliability, reduce current ripple and avoid the shortening of the service life of the battery caused by frequent charging of the battery.
Corresponding to the above embodiment, the present disclosure further provides a power supply control method.
Fig. 6 is a flowchart of a power supply control method according to an embodiment of the present disclosure.
As shown in fig. 6, a power supply control method according to an embodiment of the present disclosure is applied to the above power supply circuit, and the method includes the following steps:
S1, acquiring current of a first battery pack and/or a second battery pack and current of a first inductor and a second inductor.
And S2, controlling the full-bridge circuit based on the acquired current so as to enable the first battery pack and/or the second battery pack to supply power.
According to one embodiment of the present disclosure, controlling a full bridge circuit based on a current drawn to power a first battery pack and/or a second battery pack includes: acquiring a first current difference value between a preset reference current and the current of the first battery pack or the current of the second battery pack, and generating a first control signal and a second control signal which are complementary according to the first current difference value; obtaining a second current difference value between the current of the first inductor and the current of the second inductor, and generating a third control signal and a fourth control signal which are complementary according to the second current difference value; and controlling the full-bridge circuit according to the first control signal, the second control signal, the third control signal and the fourth control signal. The preset reference current can be calibrated according to specific parameters of the first battery pack and the second battery pack.
According to one embodiment of the present disclosure, generating complementary first and second control signals from a first current difference value includes: proportional integral adjustment is carried out on the first current difference value to obtain a first given value, a first control signal is generated according to the first given value and a first preset signal, and the first control signal is inverted to obtain a second control signal; and carrying out proportional integral regulation on the second current difference value to obtain a second given value, generating a third control signal according to the second given value and a second preset signal, and inverting the third control signal to obtain a fourth control signal, wherein the first preset signal and the second preset signal are out of phase by half period. The first preset signal and the second preset signal may be saw-tooth wave signals, where the minimum value of the saw-tooth wave signals is 0 and the maximum value of the saw-tooth wave signals is 1.
According to one embodiment of the present disclosure, controlling a full bridge circuit according to a first control signal, a second control signal, a third control signal, and a fourth control signal includes: the first upper bridge switching tube of the first bridge arm is controlled according to the first control signal, and the first lower bridge switching tube of the first bridge arm is controlled according to the second control signal; under the condition that the first bridge arm is normal, controlling a second upper bridge switching tube of the second bridge arm according to a third control signal, and controlling a second lower bridge switching tube of the second bridge arm according to a fourth control signal; and under the condition that the first bridge arm fails, controlling a second upper bridge switching tube of the second bridge arm according to the first control signal, and controlling a second lower bridge switching tube of the second bridge arm according to the second control signal.
It should be noted that, for details not disclosed in the power supply control method in the embodiment of the present disclosure, please refer to details disclosed in the power supply circuit in the embodiment of the present disclosure, and detailed descriptions thereof are omitted herein.
In summary, according to the power supply control method of the embodiment of the present disclosure, the current of the first battery pack and/or the second battery pack, the current of the first inductor and the current of the second inductor are obtained, and the control signal is generated based on the obtained current to perform phase-dislocation control on the full-bridge circuit. Therefore, the method can carry out phase-shifting control on the double bridge arms of the full-bridge circuit, can reduce control difficulty, enable the second battery pack to continuously and stably supply power, improve power supply reliability, reduce current ripple and avoid shortening of the service life of the battery caused by frequent charging of the battery.
Corresponding to the above embodiments, the present disclosure also proposes a computer-readable storage medium.
The computer-readable storage medium of the embodiment of the present disclosure has stored thereon a power supply control program that, when executed by a processor, implements the power supply control method described above.
According to the computer readable storage medium disclosed by the embodiment of the disclosure, by executing the power supply control method, the double bridge arms of the full-bridge circuit can be subjected to phase-dislocation control, so that the control difficulty can be reduced, the second battery pack can continuously and stably supply power, the power supply reliability is improved, the current ripple can be reduced, and the shortening of the service life of the battery caused by frequent charging of the battery is avoided.
Corresponding to the above embodiment, the present disclosure also proposes a vehicle.
Fig. 7 is a block schematic diagram of a vehicle according to an embodiment of the disclosure.
As shown in fig. 7, a vehicle 200 of an embodiment of the present disclosure includes: the power supply circuit 100 of the above embodiment. Wherein the power supply circuit 100 is used to supply power to the vehicle 200.
According to the vehicle disclosed by the embodiment of the disclosure, through the power supply circuit, the second battery pack can continuously and stably supply power, so that the power supply reliability is improved, the current ripple can be reduced, and the shortening of the service life of the battery caused by frequent charging of the battery is avoided.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, for example, may be considered as a ordered listing of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It should be understood that portions of the present disclosure may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, the meaning of "a plurality" is at least two, such as two, three, etc., unless explicitly specified otherwise.
In the present disclosure, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.
Although embodiments of the present disclosure have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the present disclosure, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the present disclosure.

Claims (15)

1.一种供电电路，其特征在于，包括：1. A power supply circuit, comprising: 全桥电路，所述全桥电路包括第一桥臂和第二桥臂，所述第一桥臂和所述第二桥臂并联后跨接于第一电池包的正极与第二电池包的负极之间；A full-bridge circuit, the full-bridge circuit comprising a first bridge arm and a second bridge arm, the first bridge arm and the second bridge arm being connected in parallel and bridged between the positive electrode of the first battery pack and the negative electrode of the second battery pack; 第一电感，所述第一电感的一端与所述第一桥臂的中点相连，所述第一电感的另一端分别与所述第一电池包的负极和所述第二电池包的正极相连；a first inductor, one end of the first inductor being connected to the midpoint of the first bridge arm, and the other end of the first inductor being connected to the negative electrode of the first battery pack and the positive electrode of the second battery pack respectively; 第二电感，所述第二电感的一端与所述第二桥臂的中点相连，所述第二电感的另一端分别与所述第一电池包的负极和所述第二电池包的正极相连；a second inductor, one end of the second inductor being connected to the midpoint of the second bridge arm, and the other end of the second inductor being connected to the negative electrode of the first battery pack and the positive electrode of the second battery pack respectively; 控制器，所述控制器与所述全桥电路相连，所述控制器用于对所述全桥电路进行控制，以使所述第一电池包和/或所述第二电池包供电；a controller, the controller being connected to the full-bridge circuit, and the controller being used to control the full-bridge circuit so as to supply power to the first battery pack and/or the second battery pack; 所述控制器：控制所述全桥电路处于非工作状态，以使所述第一电池包和所述第二电池包串联供电；或者，控制所述全桥电路处于工作状态，以使所述第一电池包和/或所述第二电池包供电；The controller: controls the full-bridge circuit to be in a non-operating state so that the first battery pack and the second battery pack are connected in series to supply power; or controls the full-bridge circuit to be in an operating state so that the first battery pack and/or the second battery pack are supplied power; 所述供电电路还包括：The power supply circuit also includes: 电流采样电路，所述电流采样电路用于获取所述第一电池包和/或所述第二电池包的电流、所述第一电感和所述第二电感的电流；A current sampling circuit, wherein the current sampling circuit is used to obtain the current of the first battery pack and/or the second battery pack, the current of the first inductor, and the current of the second inductor; 所述控制器，基于获取的所述电流对所述全桥电路进行控制，以使所述第一电池包和/或所述第二电池包供电；The controller controls the full-bridge circuit based on the acquired current so that the first battery pack and/or the second battery pack supplies power; 所述控制器包括：The controller comprises: 第一信号生成单元，用于根据预设参考电流与所述第一电池包的电流和/或所述第二电池包的电流之间的第一电流差值生成互补的第一控制信号和第二控制信号；a first signal generating unit, configured to generate complementary first control signals and second control signals according to a first current difference between a preset reference current and a current of the first battery pack and/or a current of the second battery pack; 第二信号生成单元，用于根据所述第一电感的电流与所述第二电感的电流之间的第二电流差值生成互补的第三控制信号和第四控制信号；a second signal generating unit, configured to generate a complementary third control signal and a fourth control signal according to a second current difference between a current of the first inductor and a current of the second inductor; 控制单元，所述控制单元基于所述第一控制信号、所述第二控制信号、所述第三控制信号和所述第四控制信号对所述全桥电路进行控制。A control unit controls the full-bridge circuit based on the first control signal, the second control signal, the third control signal, and the fourth control signal. 2.根据权利要求1所述的供电电路，其特征在于，所述第一信号生成单元包括：第一减法器、第一调节器、第一信号生成器和第一反相器，所述第一减法器用于获取所述预设参考电流与所述第一电池包的电流或所述第二电池包的电流之间的第一电流差值；所述第一调节器用于对所述第一电流差值进行比例积分调节得到第一给定值；所述第一信号生成器用于根据所述第一给定值和第一预设信号生成所述第一控制信号；所述第一反相器用于对所述第一控制信号取反得到所述第二控制信号；2. The power supply circuit according to claim 1, characterized in that the first signal generating unit comprises: a first subtractor, a first regulator, a first signal generator and a first inverter, the first subtractor is used to obtain a first current difference between the preset reference current and the current of the first battery pack or the current of the second battery pack; the first regulator is used to perform proportional-integral regulation on the first current difference to obtain a first given value; the first signal generator is used to generate the first control signal according to the first given value and the first preset signal; the first inverter is used to invert the first control signal to obtain the second control signal; 所述第二信号生成单元包括：第二减法器、第二调节器、第二信号生成器和第二反相器，所述第二减法器用于获取所述第一电感的电流与所述第二电感的电流之间的第二电流差值；所述第二调节器用于对所述第二电流差值进行比例积分调节得到第二给定值；所述第二信号生成器用于根据所述第二给定值和第二预设信号生成所述第三控制信号；所述第二反相器用于对所述第三控制信号取反得到所述第四控制信号；The second signal generating unit includes: a second subtractor, a second regulator, a second signal generator and a second inverter, wherein the second subtractor is used to obtain a second current difference between the current of the first inductor and the current of the second inductor; the second regulator is used to perform proportional integral regulation on the second current difference to obtain a second given value; the second signal generator is used to generate the third control signal according to the second given value and the second preset signal; the second inverter is used to invert the third control signal to obtain the fourth control signal; 其中，所述第一预设信号和所述第二预设信号错相半个周期。The first preset signal and the second preset signal are out of phase with each other by half a cycle. 3.根据权利要求1-2任一项所述的供电电路，其特征在于，在使所述第一电池包放电时，所述电流采样电路获取所述第二电池包的电流；在使所述第二电池包放电时，所述电流采样电路获取所述第一电池包的电流。3. The power supply circuit according to any one of claims 1-2, characterized in that when the first battery pack is discharged, the current sampling circuit obtains the current of the second battery pack; when the second battery pack is discharged, the current sampling circuit obtains the current of the first battery pack. 4.根据权利要求1所述的供电电路，其特征在于，4. The power supply circuit according to claim 1, characterized in that: 所述第一桥臂包括第一上桥开关管和第一下桥开关管，所述第一上桥开关管的一端与所述第一电池包的正极相连，所述第一上桥开关管的另一端与所述第一下桥开关管的一端相连且形成有第一连接点，所述第一下桥开关管的另一端与所述第二电池包的负极相连，所述第一连接点与所述第一电感的一端相连；The first bridge arm includes a first upper bridge switch tube and a first lower bridge switch tube, one end of the first upper bridge switch tube is connected to the positive electrode of the first battery pack, the other end of the first upper bridge switch tube is connected to one end of the first lower bridge switch tube and forms a first connection point, the other end of the first lower bridge switch tube is connected to the negative electrode of the second battery pack, and the first connection point is connected to one end of the first inductor; 所述第二桥臂包括第二上桥开关管和第二下桥开关管，所述第二上桥开关管的一端与所述第一电池包的正极相连，所述第二上桥开关管的另一端与所述第二下桥开关管的一端相连且形成有第二连接点，所述第二下桥开关管的另一端与所述第二电池包的负极相连，所述第二连接点与所述第二电感的一端相连。The second bridge arm includes a second upper bridge switch tube and a second lower bridge switch tube, one end of the second upper bridge switch tube is connected to the positive electrode of the first battery pack, the other end of the second upper bridge switch tube is connected to one end of the second lower bridge switch tube and forms a second connection point, the other end of the second lower bridge switch tube is connected to the negative electrode of the second battery pack, and the second connection point is connected to one end of the second inductor. 5.根据权利要求4所述的供电电路，其特征在于，所述第一上桥开关管、所述第一下桥开关管、所述第二上桥开关管和所述第二下桥开关管均带有反并联二极管。5 . The power supply circuit according to claim 4 , wherein the first upper bridge switch tube, the first lower bridge switch tube, the second upper bridge switch tube and the second lower bridge switch tube are all provided with anti-parallel diodes. 6.根据权利要求4或5所述的供电电路，其特征在于，所述控制单元：根据所述第一控制信号对所述第一桥臂的第一上桥开关管进行控制，并根据所述第二控制信号对所述第一桥臂的第一下桥开关管进行控制；根据所述第三控制信号对所述第二桥臂的第二上桥开关管进行控制，并根据所述第四控制信号对所述第二桥臂的第二下桥开关管进行控制。6. The power supply circuit according to claim 4 or 5 is characterized in that the control unit: controls the first upper bridge switch tube of the first bridge arm according to the first control signal, and controls the first lower bridge switch tube of the first bridge arm according to the second control signal; controls the second upper bridge switch tube of the second bridge arm according to the third control signal, and controls the second lower bridge switch tube of the second bridge arm according to the fourth control signal. 7.根据权利要求6所述的供电电路，其特征在于，所述控制单元：在所述第一桥臂失效的情况下，根据所述第一控制信号对所述第二桥臂的第二上桥开关管进行控制，并根据所述第二控制信号对所述第二桥臂的第二下桥开关管进行控制。7. The power supply circuit according to claim 6 is characterized in that the control unit: when the first bridge arm fails, controls the second upper bridge switch tube of the second bridge arm according to the first control signal, and controls the second lower bridge switch tube of the second bridge arm according to the second control signal. 8.根据权利要求1-2任一项所述的供电电路，其特征在于，所述供电电路还包括：滤波电感和滤波电容，所述滤波电感串联在所述第一电池包的正极与所述全桥电路之间，所述滤波电容与所述第一电池包并联。8. The power supply circuit according to any one of claims 1-2 is characterized in that the power supply circuit also includes: a filter inductor and a filter capacitor, the filter inductor is connected in series between the positive electrode of the first battery pack and the full-bridge circuit, and the filter capacitor is connected in parallel with the first battery pack. 9.根据权利要求1-2任一项所述的供电电路，其特征在于，所述供电电路还包括：母线电容，所述母线电容与所述第一桥臂和所述第二桥臂并联。9. The power supply circuit according to any one of claims 1-2, characterized in that the power supply circuit further comprises: a bus capacitor, wherein the bus capacitor is connected in parallel with the first bridge arm and the second bridge arm. 10.根据权利要求1-2任一项所述的供电电路，其特征在于，所述第一电池包为功率型电池包，所述第二电池包为能量型电池包；或者，所述第一电池包为能量型电池包，所述第二电池包为功率型电池包。10. The power supply circuit according to any one of claims 1-2, characterized in that the first battery pack is a power type battery pack, and the second battery pack is an energy type battery pack; or, the first battery pack is an energy type battery pack, and the second battery pack is a power type battery pack. 11.一种供电控制方法，其特征在于，应用于根据权利要求1-10任一项所述的供电电路，所述方法包括：11. A power supply control method, characterized in that it is applied to the power supply circuit according to any one of claims 1 to 10, the method comprising: 获取所述第一电池包和/或所述第二电池包的电流、所述第一电感和所述第二电感的电流；Acquire a current of the first battery pack and/or the second battery pack, and a current of the first inductor and the second inductor; 基于获取的所述电流对所述全桥电路进行控制，以使所述第一电池包和/或所述第二电池包供电；Controlling the full-bridge circuit based on the acquired current so that the first battery pack and/or the second battery pack supplies power; 所述基于获取的所述电流对所述全桥电路进行控制，以使所述第一电池包和/或所述第二电池包供电，包括：The controlling the full-bridge circuit based on the acquired current so that the first battery pack and/or the second battery pack supplies power includes: 获取预设参考电流与所述第一电池包的电流或所述第二电池包的电流之间的第一电流差值，并根据所述第一电流差值生成互补的第一控制信号和第二控制信号；Acquire a first current difference between a preset reference current and a current of the first battery pack or a current of the second battery pack, and generate complementary first control signals and second control signals according to the first current difference; 获取所述第一电感的电流与所述第二电感的电流之间的第二电流差值，并根据所述第二电流差值生成互补的第三控制信号和第四控制信号；Acquire a second current difference between the current of the first inductor and the current of the second inductor, and generate a complementary third control signal and a fourth control signal according to the second current difference; 根据所述第一控制信号、所述第二控制信号、所述第三控制信号和所述第四控制信号对所述全桥电路进行控制。The full-bridge circuit is controlled according to the first control signal, the second control signal, the third control signal and the fourth control signal. 12.根据权利要求11所述的供电控制方法，其特征在于，所述根据所述第一电流差值生成互补的第一控制信号和第二控制信号，包括：12. The power supply control method according to claim 11, wherein generating a complementary first control signal and a second control signal according to the first current difference comprises: 对所述第一电流差值进行比例积分调节得到第一给定值，并根据所述第一给定值和第一预设信号生成所述第一控制信号，以及对所述第一控制信号取反得到所述第二控制信号；Performing proportional-integral regulation on the first current difference to obtain a first given value, generating the first control signal according to the first given value and a first preset signal, and inverting the first control signal to obtain the second control signal; 对所述第二电流差值进行比例积分调节得到第二给定值，并根据所述第二给定值和第二预设信号生成所述第三控制信号，以及对所述第三控制信号取反得到所述第四控制信号，其中，所述第一预设信号和所述第二预设信号错相半个周期。The second current difference is proportionally and integrally adjusted to obtain a second given value, and the third control signal is generated according to the second given value and a second preset signal, and the third control signal is inverted to obtain the fourth control signal, wherein the first preset signal and the second preset signal are out of phase by half a cycle. 13.根据权利要求11或12所述的供电控制方法，其特征在于，所述根据所述第一控制信号、所述第二控制信号、所述第三控制信号和所述第四控制信号对所述全桥电路进行控制，包括：13. The power supply control method according to claim 11 or 12, characterized in that the controlling the full-bridge circuit according to the first control signal, the second control signal, the third control signal and the fourth control signal comprises: 根据所述第一控制信号对所述第一桥臂的第一上桥开关管进行控制，并根据所述第二控制信号对所述第一桥臂的第一下桥开关管进行控制；Controlling the first upper bridge switch tube of the first bridge arm according to the first control signal, and controlling the first lower bridge switch tube of the first bridge arm according to the second control signal; 在所述第一桥臂正常的情况下，根据所述第三控制信号对所述第二桥臂的第二上桥开关管进行控制，并根据所述第四控制信号对所述第二桥臂的第二下桥开关管进行控制；在所述第一桥臂失效的情况下，根据所述第一控制信号对所述第二桥臂的第二上桥开关管进行控制，并根据所述第二控制信号对所述第二桥臂的第二下桥开关管进行控制。When the first bridge arm is normal, the second upper bridge switch tube of the second bridge arm is controlled according to the third control signal, and the second lower bridge switch tube of the second bridge arm is controlled according to the fourth control signal; when the first bridge arm fails, the second upper bridge switch tube of the second bridge arm is controlled according to the first control signal, and the second lower bridge switch tube of the second bridge arm is controlled according to the second control signal. 14.一种计算机可读存储介质，其特征在于，其上存储有供电控制程序，该供电控制程序被处理器执行时实现根据权利要求11-13任一项所述的供电控制方法。14. A computer-readable storage medium, characterized in that a power supply control program is stored thereon, and when the power supply control program is executed by a processor, the power supply control method according to any one of claims 11 to 13 is implemented. 15.一种车辆，其特征在于，包括根据权利要求1-10任一项所述的供电电路，所述供电电路用于给车辆供电。15. A vehicle, characterized by comprising a power supply circuit according to any one of claims 1 to 10, wherein the power supply circuit is used to supply power to the vehicle.
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