CN216610885U

CN216610885U - Solar charging system and electric automobile

Info

Publication number: CN216610885U
Application number: CN202123151591.7U
Authority: CN
Inventors: 芦涛
Original assignee: Solar Power Beijing Technology Co ltd
Current assignee: Solar Power Beijing Technology Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-05-27
Anticipated expiration: 2031-12-15

Abstract

The embodiment of the application provides a solar charging system, which is applied to an electric automobile and comprises a solar component, a power battery component and a controller component, wherein the solar component is used for absorbing solar energy and converting the solar energy into electric energy; the power battery assembly is used for supplying power to the electric automobile; the controller assembly is electrically connected with the output end of the solar assembly and the input end of the power battery assembly respectively; the controller assembly is used for receiving the output voltage and the output current of the output end of the solar assembly and controlling the solar assembly to charge the power battery assembly; the controller assembly comprises a circuit board, a DC/DC converter and a communication module, wherein the DC/DC converter and the communication module are integrated on the circuit board, the output end of the DC/DC converter is electrically connected with the input end of the power battery assembly, and the communication module is electrically connected with the power battery assembly. The solar charging system can improve the integration degree of the controller module, and the circuit is simpler.

Description

Solar charging system and electric automobile

Technical Field

The application relates to the technical field of electric automobiles, in particular to a solar charging system and an electric automobile.

Background

The solar electric automobile is a novel environment-friendly vehicle and has the advantages of safety, convenience, low cost, energy conservation, no pollution and the like. Solar charging systems are an important component of solar electric vehicles.

In the prior art, for example, chinese patent with publication number CN205864046U discloses a solar charging system for a vehicle and a solar vehicle, in the patent, solar energy can charge a power battery only when an electric vehicle is running, the power battery cannot be charged when the electric vehicle is stopped, and only a low-voltage storage battery can be charged, and a complete vehicle DC/DC keeps the low-voltage storage battery fully charged during the running of the electric vehicle to meet the use of low-voltage load of the vehicle, so that the low-voltage storage battery is close to a full-charge state after the electric vehicle is stopped, and solar energy cannot continuously charge more electric energy into the low-voltage storage battery, which results in waste of solar energy. Meanwhile, the MPPT module solar controller, the DC/DC converter and the CAN communication line configured by the MPPT module solar controller and the DC/DC converter except the solar component need to be added, even a low-voltage storage battery and a connection line need to be additionally added, more electric appliances are added, the connection line is complex, and the practicability of the space which is originally compact for the electric automobile is poor.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a solar charging system and an electric automobile to improve the integration degree of a controller module, the circuit is simpler, and the occupied space is smaller.

In a first aspect, embodiments of the present application provide a solar charging system, which is applied to an electric vehicle, and includes a solar module, a power battery module, and a controller module, where the solar module is configured to absorb solar energy and convert the solar energy into electric energy; the power battery assembly is used for supplying power to the electric automobile; the controller assembly is electrically connected with the output end of the solar assembly and the input end of the power battery assembly respectively; the controller assembly is used for receiving the output voltage and the output current of the output end of the solar assembly and controlling the solar assembly to charge the power battery assembly; the controller assembly comprises a circuit board, a DC/DC converter and a communication module, wherein the DC/DC converter and the communication module are integrated on the circuit board, the output end of the DC/DC converter is electrically connected with the input end of the power battery assembly, the DC/DC converter is used for converting output voltage and output current to be matched with charging voltage of the power battery assembly, and the communication module in the controller assembly is electrically connected with the communication module in the power battery assembly.

In this scheme, the controller subassembly can be according to output voltage and the output current of solar energy component's output as the starting condition, alright in order to charge to electric automobile's power battery subassembly, can also charge for power battery when electric automobile stops like this, and electric automobile is in driving state or stop state no matter whole car, as long as the illumination condition satisfies the requirement, can continuously charge for power battery subassembly. And through all integrating DC/DC converter and communication module on the circuit board of controller subassembly, make the electrical part that installs additional on electric automobile less, the circuit is more succinct, and occupation space is littleer for the degree of integration of controller subassembly is better.

In some embodiments, the controller assembly further includes a determining circuit, the determining circuit is disposed on the circuit board, and the determining circuit is configured to determine whether the output voltage and the output current of the output end of the solar module are higher than preset values, and when the output voltage and the output current are higher than the preset values, charge the power battery assembly by controlling the output end of the DC/DC converter to communicate with the input end of the power battery assembly.

In the technical scheme, the judgment circuit is arranged, and the judgment circuit is used for controlling the output voltage and the output current of the output end of the solar module to judge, so that whether the solar module can charge the power battery module or not is controlled. Like this, solar energy component collects the electric energy that solar array sent to just can start to charge power battery pack when energy storage reaches certain condition after, can play effective protection power battery pack, reduce the operating time of auxiliary system, effectively prolonged power battery pack's life.

In some embodiments, the output voltage has a first threshold value, the output current has a second threshold value, and when the output voltage at the output end of the solar module is not less than the first threshold value and the output current is not less than the second threshold value, the determining circuit is used for controlling the output end of the DC/DC converter to be communicated with the input end of the power battery module.

Among the above-mentioned technical scheme, all have the threshold value requirement through letting the output voltage and the output current of solar energy component's output, when satisfying this threshold value requirement, can regard as the start condition that charges, improved solar charging system's charge efficiency.

In some embodiments, the conversion voltage of the DC/DC converter is not less than 150V. In the above technical solution, since the power battery assembly in this embodiment is a high voltage battery, the conversion voltage of the DC/DC converter is set to be more than 150V, thereby satisfying the voltage requirement.

In some embodiments, the solar charging system further comprises a battery management system disposed in the power battery assembly, and the battery management system communicates with the communication module in the controller assembly and the communication module in the power battery assembly through the CAN bus, respectively.

In the technical scheme, the CAN communication CAN be carried out between the controller assembly and the power battery assembly through the battery management system, and the solar charging system CAN be subjected to charging management.

In some embodiments, the controller assembly further includes an MPPT module electrically connected to the solar assembly for limiting a maximum power value of the solar assembly and tracking an output power thereof.

Among the above-mentioned technical scheme, through still including the MPPT module at the controller subassembly, the MPPT module CAN carry out maximum power point tracking, CAN control power battery pack's charging through the CAN communication according to whole car BMS's instruction to have overvoltage protection, overcurrent protection, short-circuit protection and temperature protect function, CAN play the guard action to power battery pack.

In some embodiments, the solar module is a flexible solar chip, and the solar module is mounted on the outer surface of the electric vehicle. The solar chips are arranged into a plurality of groups, and the plurality of groups of solar chips are combined in series and parallel to form the solar assembly.

In a second aspect, an embodiment of the present application further provides an electric vehicle, where the electric vehicle includes the foregoing solar charging system.

Additional features and advantages of the present application will be described in detail in the detailed description which follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a block diagram of a solar charging system according to some embodiments of the present disclosure.

Icon: 1-a solar module; 2-a controller component; 3-power battery component.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, in the description of the embodiments of the present application, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and can include, for example, a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present embodiment can be understood by those of ordinary skill in the art according to specific situations.

Examples

The embodiment of the application provides a solar charging system, which is applied to an electric vehicle, please refer to fig. 1, the solar charging system comprises a solar component 1, a power battery component 3 and a controller component 2, the solar component 1 is used for absorbing solar energy and converting the solar energy into electric energy; the power battery assembly 3 is used for supplying energy to the electric automobile; the controller component 2 is respectively and electrically connected with the output end of the solar component 1 and the input end of the power battery component 3; the controller assembly 2 is used for receiving the output voltage and the output current of the output end of the solar assembly 1 and controlling the solar assembly 1 to charge the power battery assembly 3; the controller assembly 2 comprises a circuit board, a DC/DC converter and a communication module, the DC/DC converter and the communication module are integrated on the circuit board, the output end of the DC/DC converter is electrically connected with the input end of the power battery assembly 3, the DC/DC converter is used for converting output voltage and output current to be matched with charging voltage of the power battery assembly 3, and the communication module is electrically connected with the power battery assembly 3.

In this scheme, controller subassembly 2 can be according to the output voltage and the output current of solar energy component 1's output as the starting condition, alright in order to charge to electric automobile's power battery pack 3, can also charge for power battery pack 3 when electric automobile stops like this, and electric automobile is in driving state or off state no matter whole car, as long as the illumination condition satisfies the requirement, can continuously charge for power battery pack 3. And through all integrating DC/DC converter and communication module on the circuit board of controller subassembly 2, make the electrical part of installing additional on electric automobile less, the circuit is more succinct, and occupation space is littleer for the degree of integration of controller subassembly 2 is better.

The solar module 1 is generally mounted on the roof or the outer surface of the vehicle body, the controller module 2 is generally mounted in the vehicle, the frame or the chassis, and the power battery module 3 is generally mounted in the chassis, the electric cabin or the battery cabin of the electric vehicle.

In some embodiments, the controller assembly 2 further includes a determining circuit disposed on the circuit board, and the determining circuit is configured to determine whether the output voltage and the output current of the output end of the solar module 1 are higher than preset values, and when the output voltage and the output current are higher than the preset values, charge the power battery assembly 3 by controlling the output end of the DC/DC converter to communicate with the input end of the power battery assembly 3.

In the above technical solution, by setting the determination circuit, the determination circuit is used to control the output voltage and the output current of the output end of the solar module 1 to determine, so as to control whether the solar module 1 can charge the power battery module 3. Like this, solar energy component 1 collects the electric energy that solar array sent to just can start to charge power battery component 3 after energy storage reaches certain condition, can play effective protection power battery component 3, reduce the operating time of auxiliary system, effectively prolonged power battery component 3's life.

Specifically, when the output voltage and the output current are higher than preset values, the DC/DC converter may be awakened, so that the output end of the DC/DC converter is communicated with the input end of the power battery assembly 3, and the power battery assembly 3 may be charged. When the output voltage and the output current are lower than the preset values, the DC/DC converter is in a dormant state, and the output end of the DC/DC converter is disconnected from the input end of the power battery assembly 3, so that the power battery assembly 3 cannot be charged.

In some embodiments, the output voltage has a first threshold value, the output current has a second threshold value, and when the output voltage at the output end of the solar module 1 is not less than the first threshold value and the output current is not less than the second threshold value, the determining circuit is configured to control the output end of the DC/DC converter to communicate with the input end of the power battery module 3.

Among the above-mentioned technical scheme, all have the threshold value requirement through letting the output voltage and the output current of solar energy component 1's output, when satisfying this threshold value requirement, can regard as the start condition that charges, improved solar charging system's charge efficiency.

The threshold value can be adjusted according to the requirements of the whole vehicle, and is determined according to the specific actual conditions. The first threshold may be 20V, 30V, 40V, 50V, 60V, etc. The input voltage of the DC/DC converter in the embodiment is 20V-60V, and the input voltage is lower than 60V, so that the safety of the DC/DC converter is ensured.

In some embodiments, the first threshold is 20V and the second threshold is 1A.

In some embodiments, the conversion voltage of the DC/DC converter is not less than 150V. In the above technical solution, since the power battery assembly 3 in this embodiment is a high voltage battery, the conversion voltage of the DC/DC converter is set to be more than 150V, thereby meeting the voltage requirement of the power battery assembly 3.

The high-voltage battery voltage is greater than 150V, including but not limited to 150V, 280V, 330V, 350V, 380V, 400V, 550V, 580V, 620V, 800V and the like.

In some embodiments, the solar charging system further comprises a battery management system disposed in the power battery assembly 3, and the battery management system communicates with the communication module in the controller assembly 2 and the communication module in the power battery assembly 3 through the CAN bus, respectively.

In the technical scheme, the controller assembly 2 and the power battery assembly 3 CAN be communicated with each other through the battery management system in a CAN mode, and the solar charging system CAN be subjected to charging management.

In some embodiments, the controller assembly 2 further comprises an MPPT module electrically connected to the solar assembly 1 for limiting the maximum power value of the solar assembly 1 and tracking its output power.

Among the above-mentioned technical scheme, through still including the MPPT module at controller subassembly 2, the MPPT module CAN carry out maximum power point tracking, CAN control power battery subassembly 3's charging through the CAN communication according to whole car BMS's instruction to have overvoltage protection, overcurrent protection, short-circuit protection and temperature protect function, CAN play the guard action to power battery subassembly 3.

In some embodiments, the solar module 1 is a flexible solar chip, and the solar module 1 is mounted on the outer surface of the electric vehicle. The solar chips are arranged into a plurality of groups, and the plurality of groups of solar chips are combined in series and parallel to form the solar component 1.

Wherein, the work control mode of solar charging system does:

when sunlight exists, the solar module 1 generates voltage and current, when the first threshold and the second threshold set by the controller module 2 are reached (the thresholds can be adjusted according to the requirements of the whole vehicle, the output voltage is set to be more than or equal to 20V in the embodiment, and the output current is more than or equal to 1A), under the action of the judging circuit, the controller module 2 is started, meanwhile, the controller module 2 sends a charging request signal to a Battery Management System (BMS) of the whole vehicle, after a charging allowing instruction returned by the BMS is received, the high-voltage charging function of the solar charging system is started, the converted electric energy is used for charging the power battery module 3, when the power battery module 3 is fully charged, the solar charging system stops charging, and the cycle is carried out. The charging can be continuously carried out as long as the illumination condition meets the requirement no matter the whole vehicle is in a running or stopping state. When solar illumination is absent or the whole vehicle is not allowed to be charged by solar energy due to faults, the solar charging system is not started.

It should be noted that BMS (BATTERY management system), commonly called BATTERY caretaker or BATTERY manager; the Battery Management System (BMS) is mainly to intelligently manage and maintain each battery cell, prevent overcharge and overdischarge of the battery, extend the life span of the battery, and monitor the state of the battery. The intelligent management and maintenance system is used for intelligently managing and maintaining each battery unit, preventing the battery from being overcharged and overdischarged, prolonging the service life of the battery and monitoring the state of the battery. In addition, the MPPT module controller is called a Maximum Power Point Tracking (Maximum Power Point Tracking) solar controller, and can output solar energy to the Maximum.

It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A solar charging system is applied to an electric automobile and is characterized by comprising:

the solar module is used for absorbing solar energy and converting the solar energy into electric energy;

the power battery assembly is used for supplying power to the electric automobile;

the controller assembly is electrically connected with the output end of the solar assembly and the input end of the power battery assembly respectively; the controller assembly is used for receiving the output voltage and the output current of the output end of the solar assembly and controlling the solar assembly to charge the power battery assembly;

the controller assembly comprises a circuit board, a DC/DC converter and a communication module, wherein the DC/DC converter and the communication module are integrated on the circuit board, the output end of the DC/DC converter is electrically connected with the input end of the power battery assembly, the DC/DC converter is used for converting the output voltage and the output current to be matched with the charging voltage of the power battery assembly, and the communication module in the controller assembly is electrically connected with the communication module in the power battery assembly.

2. The solar charging system of claim 1, wherein the controller assembly further comprises:

the judging circuit is arranged on the circuit board and used for judging whether the output voltage and the output current of the output end of the solar module are higher than preset values or not and controlling the output end of the DC/DC converter to be communicated with the input end of the power battery module to charge the power battery module when the output voltage and the output current are higher than the preset values.

3. The solar charging system of claim 2, wherein the output voltage has a first threshold value, the output current has a second threshold value, and when the output voltage at the output terminal of the solar module is not less than the first threshold value and the output current is not less than the second threshold value, the determining circuit is configured to control the output terminal of the DC/DC converter to communicate with the input terminal of the power battery module.

4. The solar charging system of claim 3, wherein the first threshold is 20V and the second threshold is 1A.

5. The solar charging system of claim 1, wherein the DC/DC converter has a conversion voltage of not less than 150V.

6. The solar charging system of claim 1, further comprising:

and the battery management system is arranged in the power battery assembly and is respectively communicated with the communication module in the controller assembly and the communication module in the power battery assembly through a CAN bus.

7. The solar charging system of claim 1, wherein the controller assembly further comprises an MPPT module electrically connected to the solar assembly for limiting a maximum power value of the solar assembly and tracking an output power thereof.

8. The solar charging system of claim 1, wherein the solar module is a flexible solar chip, and the solar module is mounted on an outer surface of the electric vehicle.

9. The solar charging system of claim 8, wherein the solar chips are arranged in a plurality of groups, and the plurality of groups of solar chips are combined in series and parallel to form the solar module.

10. An electric vehicle comprising the solar charging system of any one of claims 1-9.