Battery balancing device, battery balancing control method, battery management system, and medium

Abstract

The present application provides a battery balancing device, a battery balancing control method, a battery management system, and a medium. The device comprises a battery management system, a battery pack, a switch network, and a power supply; the battery management system is respectively connected to the battery pack, the switch network, and the power supply, and the battery pack, the switch network, and the power supply are sequentially connected; the battery management system is used for measuring first working parameters of each battery cell in real time and calculating a first state of charge of each battery cell; if the first working parameters and / or the first state of charge do not meet corresponding index threshold values, a switch corresponding to a corresponding target battery cell is controlled to switch from an on state to an off state. By implementing the solution of the present application, under the control of the battery management system, balanced charging and discharging of a battery can be achieved only by using a power supply and a switch network, the complexity of a balancing structure is reduced, the reliability and the balancing efficiency of the system are effectively improved, and the service cycle of the battery is prolonged.

Description

Battery balancing device, battery balancing control method, battery management system and medium Technical Field

[0001] The present application relates to the field of battery balancing technology, and in particular to a battery balancing device, a battery balancing control method, a battery management system, and a medium. Background Art

[0002] To achieve higher efficiency and faster charging speeds, current energy storage and power batteries are using higher and higher voltages. High-voltage batteries are constructed from low-voltage cells connected in series. Due to differences in cell parameters, location within the battery pack, and heat dissipation conditions, different cells age at different rates during use. The cells that age the fastest, acting as the weakest link in the entire battery, determine the battery's lifespan.

[0003] To extend battery life, typical battery management systems (BMSs) incorporate cell balancing strategies, which are categorized as passive balancing and active balancing. Passive balancing uses resistors to discharge cells with excessively high voltages during charging, thereby increasing overall charging capacity. However, this energy is converted into heat and wasted, making it inefficient and potentially causing heat dissipation issues. Active balancing strategies are categorized by the energy transfer method. Active balancing strategies are categorized into two types: balancing through energy transfer, such as the Flying Capacitor method, inductive balancing, and transformer balancing. Active balancing strategies utilize independent power supplies, such as flyback converter balancing. These two methods can functionally achieve the purpose of lossless balancing, but they also have obvious disadvantages. For example, for independent balancing power supply solutions, each battery cell needs to be equipped with an independent balancing power supply, which leads to a large number of balancing power supplies and low reliability. In addition, in order to ensure the accuracy of the replenishment voltage, the independent power supply has high consistency requirements, or needs to have voltage regulation and current limiting power, which will further increase the system complexity and cost. For energy transfer balancing solutions, multiple switching networks need to be designed, which have a more complex structure and lower reliability. In addition, batteries with smaller capacity need to complete multiple charge and discharge operations in one charge and discharge cycle, further accelerating aging. Technical issues

[0004] The main purpose of this application is to provide a battery balancing device, a battery balancing control method, a battery management system and a medium, which can at least solve the problems of complex battery balancing structure and low reliability in related technologies. Technical Solutions

[0005] To achieve the above objectives, the present application provides a first aspect of a battery balancing device, the device comprising:

[0006] A battery management system, a battery pack, a switch network, and a power supply; the battery management system is connected to the battery pack, the switch network, and the power supply, respectively, and the battery pack, the switch network, and the power supply are connected in sequence;

[0007] The battery pack includes a plurality of battery cells, the switch network includes a plurality of switches corresponding to the battery cells, and each of the battery cells is connected to a corresponding switch respectively;

[0008] The battery management system is used to detect the first operating parameters of each battery cell in real time and calculate the first state of charge of each battery cell. If the first operating parameter and / or the first state of charge do not meet the corresponding indicator threshold, the switch corresponding to the corresponding target battery cell is controlled to switch from the on state to the off state.

[0009] A second aspect of the present application provides a battery balancing control method, which is applied to the battery balancing device provided in the first aspect of the present application. The battery balancing control method includes:

[0010] Real-time detection of a first operating parameter of each battery cell and calculation of a first state of charge of each battery cell; wherein the first operating parameter includes at least a current value, a voltage value, and a temperature value;

[0011] matching the first operating parameter and the first state of charge with corresponding preset indicator thresholds respectively;

[0012] If the first operating parameter and / or the first state of charge does not meet the corresponding indicator threshold, the switch corresponding to the corresponding target battery cell is controlled to switch from the on state to the off state.

[0013] A third aspect of the present application provides a battery management system, comprising: a memory and a processor, wherein the processor is configured to execute a computer program stored in the memory. When the processor executes the computer program, the processor implements the steps of the battery balancing control method provided in the second aspect of the present application.

[0014] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the battery balancing control method provided in the second aspect of the present application are implemented. Beneficial effects

[0015] As can be seen from the above, the battery balancing device provided by the present application solution manages the battery pack, switch network and power supply separately through the battery management system. The entire system only requires one power supply and one switch network, which effectively reduces the complexity of the system structure and is conducive to improving the reliability of the system; in addition, the battery management system detects the operating parameters of each battery cell in real time and calculates the charge state of each battery cell. When it is determined that the operating parameters and / or charge state do not meet the corresponding indicator threshold, it controls the switch corresponding to the corresponding target battery cell to switch from the on state to the off state. In this way, the target battery cell can be directly bypassed without the need to discharge the target battery cell multiple times, thereby effectively extending the battery life and improving the system balancing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0017] FIG1 is a schematic structural diagram of a battery balancing device provided in a first embodiment of the present application;

[0018] FIG2 is a schematic structural diagram of another battery balancing device provided in the first embodiment of the present application;

[0019] FIG3 is a schematic diagram of the basic flow of a battery balancing control method provided in a second embodiment of the present application;

[0020] FIG4 is a schematic structural diagram of a battery management system provided in the third embodiment of the present application. Modes for Carrying Out the Invention

[0021] In order to make the purpose, features, and advantages of the invention of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, the meaning of "plurality" is two or more, unless otherwise clearly specified.

[0023] In the active balancing strategy in the relevant technology, the high-voltage battery cells in the charging stage will be discharged to ensure the charging capacity in turn, and the electric energy will be transferred to the low-voltage battery cells or fed back to the power supply; in the discharge stage, the low-voltage battery cells will be supplemented to ensure sufficient discharge depth; commonly used active balancing strategies such as independent balancing power supply solutions require each battery cell to be equipped with an independent balancing power supply. During discharge, if the corresponding battery cell voltage is low, the corresponding power supply is selected through the switching network to supplement the power for the battery cell; during charging, if the corresponding battery cell voltage is high, the battery cell can be discharged through a balancing power supply designed as a bidirectional power supply; the switching network of this solution is relatively simple, but the number of balancing power supplies is relatively large, and there will be reliability issues; for the energy transfer balancing solution, the battery cells that need to be discharged or charged are connected to the energy storage power supply unit through the switching network. The switching network is relatively complex, which will reduce the reliability of the system.

[0024] Therefore, to address the issues of complex cell balancing structures and low reliability in related technologies, a first embodiment of the present application provides a cell balancing device. FIG1 is a schematic structural diagram of a cell balancing device according to this embodiment. The cell balancing device includes a battery management system 100, a battery pack 200, a switch network 300, and a power supply 400. The battery management system is connected to the battery pack, the switch network, and the power supply, respectively. The battery pack, the switch network, and the power supply are connected in sequence.

[0025] Specifically, the battery pack includes multiple battery cells, the switch network includes multiple switches corresponding to the battery cells, and each battery cell is connected to a corresponding switch respectively; the battery management system is used to detect the first operating parameters of each battery cell in real time, and calculate the first state of charge of each battery cell. If the first operating parameter and / or the first state of charge does not meet the corresponding indicator threshold, the switch corresponding to the corresponding target battery cell is controlled to switch from the on state to the off state.

[0026] In this embodiment, the battery balancing device uses a battery management system (BMS) as the main control unit for controlling the power supply and the on / off switching network, and detecting the operating parameters of the battery pack. A switch network unit is used to control the operating state of the battery pack. The switch network unit includes multiple switches, and the battery pack includes multiple cells. There is a one-to-one correspondence between the switches and the cells. The cells can be of the same or different models. In other words, the battery balancing device can use cells with different operating parameters and capacities connected in series to form a battery pack, thereby improving the ease of system maintenance and expansion. The battery management system detects the operating parameters of each cell in real time and calculates the state of charge of each cell to determine whether the corresponding cell has an operating condition (such as an abnormality such as overvoltage or undervoltage). The corresponding switch is then switched to an off state to bypass the abnormal cell, thereby achieving battery balancing management, ensuring system safety and stability, and extending the battery life. Moreover, only one bidirectional power supply and one switch network are required to achieve balanced charging of the batteries, simplifying the system structure and facilitating system integration and maintenance convenience. It should be noted that the State of Charge (SOC) can be simply understood as the remaining available power of the battery. If the battery management system cannot accurately calculate the remaining power, it will cause misjudgment and affect system stability. Therefore, it is very important to accurately assess the SOC.

[0027] Furthermore, FIG2 is a schematic structural diagram of another battery balancing device provided in this embodiment. Referring to FIG2 , the positive electrode of the battery cell is connected to the first contact of the switch and the detection unit of the battery management system, respectively. The negative electrode of the battery cell is connected to the second contact of the switch. The third contact of the first switch is connected to the positive electrode of the power supply and the battery management system, respectively. The third contacts of the remaining switches are connected to the second contact of the previous switch, respectively. The negative electrode of the power supply is connected to the second contact of the last switch.

[0028] Specifically, in this embodiment, the battery pack is obtained by connecting a plurality of battery cells of the same or different specifications in series, and the positive and negative ends of each battery cell are respectively connected to the two contacts of the corresponding switch, and each switch is connected in sequence, wherein the third contact of the first switch is connected to the positive pole of the power supply, and the negative pole of the power supply is connected to the second contact of the last switch; when the third contact of the switch is connected to the first contact, the switch is in the on state, and the corresponding battery cell is connected to the power supply; similarly, when the third contact of the switch is connected to the second contact, the switch is in the off state, and the corresponding battery cell is bypassed, that is, disconnected from the system; the battery management system includes a BMS unit and a detection unit, and the detection unit It can be one or more. In this embodiment, multiple detection units are optionally used to detect the working parameters of each battery cell respectively. The working parameters can be the voltage value V, current value I, temperature value T, etc. of the battery cell, and the charge state of each battery cell is calculated according to the relevant parameters, and then transmitted to the BMS unit, so that the BMS unit can evaluate the working condition of the corresponding battery according to the corresponding information, and find abnormal batteries in time to control the corresponding switch to the cut-off state, and bypass the abnormal batteries, thereby extending the service life of the battery; at the same time, by bypassing the abnormal batteries, compared with shutting off the power supply when a single battery cell is overcharged, it has the effect of fully utilizing the battery cell capacity.

[0029] Furthermore, the battery balancing device further includes a plurality of diodes, wherein the anode of each diode is connected to the first contact of the corresponding switch, and the cathode of each diode is connected to the positive electrode of the corresponding battery cell.

[0030] Specifically, in this embodiment, a diode may be provided between the battery cell and the switch corresponding to the battery cell, so as to perform rectification and backflow prevention functions; in addition, a fuse may be provided between the battery cell and the switch to prevent damage to the battery cell due to excessive current.

[0031] FIG3 is a schematic diagram of the basic flow of a battery balancing control method provided in the second embodiment of the present application. The battery balancing control method can be applied to the aforementioned battery balancing device. As shown in FIG3 , the battery balancing control method includes the following steps:

[0032] Step 301: Detect a first operating parameter of each battery cell in real time, and calculate a first state of charge of each battery cell.

[0033] Specifically, in this embodiment, the first operating parameter includes at least a current value, a voltage value and a temperature value; the first operating parameter and the first state of charge are the operating parameters and the state of charge detected when the switch corresponding to the battery cell is in the on state; after the system is started, the battery management system detects the operating parameters and the state of charge of each battery cell in real time to evaluate the working state of the battery cell.

[0034] In some implementations of this embodiment, before the step of detecting the first operating parameter of each battery cell in real time, the method further includes: when detecting that a change in the current operating mode of the battery balancing device has occurred, detecting the operating state of each switch; wherein the current operating mode includes any one of the following: a charging mode and a discharging mode; and if any target switch is in an off state, controlling the target switch to switch to an on state to enable the corresponding battery cell to operate normally.

[0035] Specifically, in this embodiment, each time the system's operating mode changes, for example, from charging mode to discharging mode, and vice versa, the operating state of each switch is detected. When a target switch is detected to be in the off state, it is switched to the on state to avoid bypassed cells in the new operating mode, which may result in failure to detect and process them in the corresponding mode, leading to misjudgment in subsequent decisions.

[0036] Step 302: Match the first operating parameter and the first state of charge with corresponding preset indicator thresholds respectively.

[0037] Specifically, in this embodiment, since the battery packs in the battery balancing device can use cells of different specifications, different indicator thresholds can be set for each cell. Alternatively, a single indicator threshold can be set based on the specifications of each cell. Specifically, the indicator thresholds corresponding to the operating parameters can be set to be the same or different, and the indicator thresholds corresponding to the state of charge can be set to be the same or different. The specific setting method is adjusted based on actual needs. In this embodiment, a unified standard can be optionally adopted to facilitate the management of various parameters. When the operating parameters and state of charge of each cell are detected, the corresponding indicator thresholds are searched for according to the performance parameter type. Then, each operating parameter and state of charge is compared with the corresponding indicator threshold to evaluate the operating condition of the corresponding cell.

[0038] In some implementations of this embodiment, the step of matching the first operating parameter and the first state of charge with corresponding preset indicator thresholds includes: matching the voltage value, current value, and temperature value of each battery cell with the voltage threshold, current threshold, and temperature threshold associated with the corresponding battery cell, respectively; and, when the current operating mode of the battery balancing device is the charging mode, matching the state of charge of each battery cell with the upper limit of the power associated with the corresponding battery cell; and when the current operating mode of the battery balancing device is the discharging mode, matching the state of charge of each battery cell with the lower limit of the power associated with the corresponding battery cell.

[0039] Specifically, in this embodiment, the working parameters of the battery cell may be current values, voltage values, temperature values, etc. When performing the comparison, each parameter value needs to be compared with the corresponding index threshold value, wherein the comparison order of each parameter may be simultaneous or sequential. For example, different working parameters may be selected as priority comparison objects according to different working modes. The priority comparison objects may be one or more, so as to make a decision quickly, and the integrity and accuracy of the detection may be ensured by detecting multiple working parameters. Accordingly, the detection order of the state of charge and the working parameters may also be simultaneous or different, and under different working modes, the index threshold value corresponding to the state of charge of the same battery cell is also different. When the current working mode of the system is the charging mode, the preset upper limit value of the power is directly selected as the reference index threshold value, and in the discharging mode, the preset lower limit value of the power is selected as the reference index threshold value. Accordingly, upper and lower limits may also be set for the working parameters for use in different working modes.

[0040] Step 303: If the first operating parameter and / or the first state of charge does not meet the corresponding indicator threshold, control the switch corresponding to the corresponding target battery cell to switch from the on state to the off state.

[0041] Specifically, in this embodiment, when it is detected that the working parameters and / or the first state of charge of a certain battery cell do not meet the index threshold, for example, when they exceed the upper limit value or are lower than the lower limit value, the switch corresponding to the battery cell is controlled to switch to the cut-off state; it should be noted that when any parameter of the working parameters of any battery cell does not meet the requirements, the battery cell is judged to be abnormal, and the corresponding switch is controlled to disconnect to prevent the battery cell from being damaged due to any abnormal phenomenon such as overvoltage, overcurrent, overtemperature, etc.

[0042] In some implementations of this embodiment, after the step of controlling the switch corresponding to the corresponding battery cell to switch from the on state to the off state, it also includes: if after controlling a single switch to complete the state switching, all switches in the switch network are in the same working state, then the power supply is controlled to stop working and the processing result corresponding to the current working mode is reported; wherein the processing result includes any one of the following: charging completed, insufficient power.

[0043] Specifically, in this embodiment, when all switches are in the on state or the off state after each battery cell is detected and balanced during the charging or discharging process, it is judged that the current system is in a state of charging completion or low battery power, and the power supply is controlled to stop working, and the result is reported to the terminal.

[0044] In other implementations of this embodiment, after the step of controlling the switch corresponding to the corresponding target battery cell to switch from the on state to the off state, it also includes: detecting the second operating parameter and the second state of charge of the target battery cell; wherein the second operating parameter and the second state of charge are the operating parameters and the second state of charge detected when the switch corresponding to the target battery cell is in the off state; if the second operating parameter and / or the second state of charge do not meet the corresponding indicator threshold, the power supply is controlled to stop working.

[0045] Specifically, in this embodiment, after the target battery cell with an abnormality is bypassed, the target battery cell will continue to be detected and processed. If it is detected that the operating parameters and / or charge status of the target battery cell that has been separated from the charging circuit still do not meet the corresponding indicator thresholds, that is, the abnormality has not been resolved, indicating that other abnormalities have occurred in the battery cell, the power supply is controlled to stop working, and the abnormal information is reported to the terminal, thereby ensuring the safety and reliability of the system.

[0046] Based on the technical solution of the embodiment of the present application, the first operating parameter of each battery cell is detected in real time, and the first state of charge of each battery cell is calculated; wherein, the first operating parameter includes at least a current value, a voltage value and a temperature value; the first operating parameter and the first state of charge are matched with the corresponding preset index thresholds respectively; if the first operating parameter and / or the first state of charge do not meet the corresponding index thresholds, the switch corresponding to the corresponding target battery cell is controlled to switch from the on state to the off state. Through the implementation of the solution of the present application, the operating parameters and the state of charge of each battery cell are detected in real time. When it is detected that the operating parameters or the state of charge do not meet the requirements, the corresponding switch is controlled to switch to the off state to bypass the corresponding battery cell, thereby effectively extending the service life of the battery and improving the reliability of the system. In addition, batteries of different specifications can be used in series, and there is no need to charge and discharge the battery multiple times, which is convenient for system maintenance and expansion and has high overall efficiency.

[0047] FIG4 is a schematic diagram of the structure of a battery management system provided in a third embodiment of the present application. The battery management system can be used to implement the battery balancing control method in the aforementioned embodiment, mainly including:

[0048] Memory 401, processor 402, and computer program 403 stored in memory 401 and executable on processor 402. Memory 401 and processor 402 are connected via communication. When processor 402 executes computer program 403, the method in the aforementioned embodiment is implemented. The number of processors may be one or more.

[0049] The memory 401 can be a high-speed random access memory (RAM) memory or a non-volatile memory such as a disk drive. The memory 401 is used to store executable program code. The processor 402 is coupled to the memory 401 .

[0050] Furthermore, an embodiment of the present application also provides a computer-readable storage medium, which may be provided in the above-mentioned battery management system. The computer-readable storage medium may be the memory in the embodiment shown in FIG. 4 .

[0051] The computer-readable storage medium stores a computer program that, when executed by a processor, implements the battery balancing control method described in the aforementioned embodiment. Furthermore, the computer-readable storage medium may be a USB flash drive, a mobile hard drive, a read-only memory (ROM), RAM, a magnetic disk, or an optical disk, among other media capable of storing program code.

[0052] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application. Moreover, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other.

[0053] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0054] The above is a description of the battery balancing device, battery balancing control method, battery management system, and medium provided in this application. Those skilled in the art will appreciate that variations in the specific implementation and scope of application may occur based on the concepts of the embodiments of this application. Therefore, this specification should not be construed as limiting this application.

Claims

1. A battery balancing device, characterized in that: include: A battery management system, a battery pack, a switch network and a power supply; the battery management system is connected to the battery pack, the switch network and the power supply respectively, and the battery pack, the switch network and the power supply are connected in sequence; The battery pack includes a plurality of battery cells, the switch network includes a plurality of switches corresponding to the battery cells, and each of the battery cells is connected to a corresponding switch respectively; The battery management system is used to detect the first operating parameter of each battery cell in real time, and calculate the first state of charge of each battery cell. If the first operating parameter and / or the first state of charge do not meet the corresponding indicator threshold, the switch corresponding to the corresponding target battery cell is controlled to switch from the on state to the off state.

2. The battery equalization device according to claim 1, characterized in that: The positive pole of the battery cell is respectively connected to the first contact of the switch and the detection unit of the battery management system, the negative pole of the battery cell is connected to the second contact of the switch, the third contact of the first switch is respectively connected to the positive pole of the power supply and the battery management system, the third contacts of the remaining switches are respectively connected to the second contact of the previous switch, and the negative pole of the power supply is connected to the second contact of the last switch.

3. The battery equalization device according to claim 2, characterized in that: It also includes a plurality of diodes, wherein the anode of each diode is connected to the first contact of the corresponding switch, and the cathode of each diode is connected to the anode of the corresponding battery cell.

4. A battery balancing control method, characterized in that: Applied to the battery balancing device according to any one of claims 1 to 3, the battery balancing control method comprises: Real-time detection of a first operating parameter of each battery cell, and calculation of a first state of charge of each battery cell; wherein the first operating parameter at least includes a current value, a voltage value, and a temperature value; matching the first operating parameter and the first state of charge with corresponding preset indicator thresholds respectively; If the first operating parameter and / or the first state of charge does not meet the corresponding indicator threshold, the switch corresponding to the corresponding target battery cell is controlled to switch from the on state to the off state.

5. The battery balancing control method according to claim 4, characterized in that: Before the step of detecting the first operating parameter of each battery cell in real time, the method further includes: When it is detected that the current working mode of the battery balancing device changes, the working state of each of the switches is detected; wherein the current working mode includes any one of the following: charging mode and discharging mode; If there is a target switch in the off state, the target switch is controlled to switch to the on state, so that the corresponding battery cell works normally.

6. The battery balancing control method according to claim 5, characterized in that: After the step of controlling the switch corresponding to the corresponding battery cell to switch from the on state to the off state, the method further includes: If all the switches in the switch network are in the same working state after controlling a single switch to complete state switching, the power supply is controlled to stop working and a processing result corresponding to the current working mode is reported; wherein the processing result includes any one of the following: charging completed, insufficient power.

7. The battery balancing control method according to claim 4, characterized in that: The step of matching the first operating parameter and the first state of charge with corresponding preset indicator thresholds respectively includes: Matching the voltage value, current value and temperature value of each battery cell with the voltage threshold, current threshold and temperature threshold associated with the corresponding battery cell respectively; And, when the current working mode of the battery balancing device is the charging mode, the state of charge of each of the battery cells is matched with the upper limit value of the power associated with the corresponding battery cell; When the current working mode of the battery balancing device is the discharge mode, the charge state of each of the battery cells is matched with the lower limit value of the power quantity associated with the corresponding battery cell.

8. The battery balancing control method according to any one of claims 4 to 7, characterized in that: After the step of controlling the switch corresponding to the corresponding target battery cell to switch from the on state to the off state, the method further includes: Detecting a second operating parameter and a second state of charge of the target battery cell; wherein the second operating parameter and the second state of charge are operating parameters and the state of charge detected when the switch of the target battery cell is in an off state; If the second operating parameter and / or the second state of charge does not meet the corresponding indicator threshold, the power supply is controlled to stop working.

9. A battery management system, characterized in that: include: A memory and a processor, wherein: The processor is used to execute the computer program stored in the memory; When the processor executes the computer program, the steps in the battery balancing control method according to any one of claims 4 to 8 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps in the battery balancing control method according to any one of claims 4 to 8 are implemented.

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