Balancing method and device for lead-acid storage battery

Abstract

The invention provides a lead-acid storage battery equalization method and device, and relates to the technical field of battery equalization, and the method comprises the steps: responding to the start of equalization detection, disconnecting a battery pack from an external circuit, and collecting the performance data of each battery in the battery pack; analyzing according to the performance data of each battery so as to determine an equalization condition in the battery pack; and controlling the lead-acid storage battery equalization device to perform equalization operation on the batteries in the battery pack according to the equalization condition. Through the performance data of the battery, the detection of the balance condition of the battery pack is realized, the battery pack is balanced in time, the reduction of operation efficiency caused by imbalance of the battery pack is avoided, and the operation efficiency of the battery pack is improved.

Description

Technical Field

[0001] This application relates to the technical field of battery equalization, and particularly to a lead-acid battery equalization method and device. Background Art

[0002] In modern power systems, hydroelectric power plants play a crucial role, and their stable operation is essential for ensuring energy supply and grid security. As a key auxiliary device of hydroelectric power plants, the performance of the DC operating power supply system is directly related to the emergency response ability and long-term operation safety of the power plant. As the core of the DC operating power supply system, the performance and lifespan of lead-acid batteries directly affect the stability and economy of the entire system. Currently, there is a lack of detection for battery equalization degree, resulting in the inability to timely discover the imbalance of the battery pack and perform equalization in a timely manner. Summary of the Invention

[0003] This application aims to at least partly solve one of the technical problems in the related art.

[0004] To this end, the first objective of this application is to propose a lead-acid battery equalization device.

[0005] The second objective of this application is to propose a method.

[0006] The third objective of this application is to propose an electronic device.

[0007] The fourth objective of this application is to propose a computer-readable storage medium.

[0008] The fifth objective of this application is to propose a computer program product.

[0009] To achieve the above objectives, the first aspect embodiment of this application proposes a lead-acid battery equalization device, including: an anti-reverse connection circuit, an auxiliary power supply circuit, a control circuit, a sampling circuit, a communication circuit, and a dual-active bridge conversion circuit;

[0010] The anti-reverse connection circuit is connected to the battery terminal, and the battery terminal is connected to an external battery;

[0011] The anti-reverse connection circuit is connected to the dual-active bridge conversion circuit;

[0012] The dual-active bridge conversion circuit is connected to the DC high-voltage terminal, and the DC high-voltage terminal is connected to the DC bus;

[0013] The auxiliary power supply circuit is connected to the battery terminal, the DC high-voltage terminal, and the control circuit, and the auxiliary power supply circuit is used to supply power to the control circuit;

[0014] The control circuit is connected to the dual-active-bridge conversion circuit, the sampling circuit, and the communication circuit, and is used to receive information sent by other circuits and control the operation of other circuits.

[0015] Optionally, the lead-acid battery equalization device is connected in parallel with a single battery in the battery pack.

[0016] To achieve the above object, an embodiment of the second aspect of the present application proposes a lead-acid battery equalization method, including:

[0017] In response to the start of equalization detection, disconnect the connection between the battery pack and the external circuit, and collect the performance data of each battery in the battery pack;

[0018] Analyze the performance data of each battery to determine the equalization situation in the battery pack;

[0019] Control the lead-acid battery equalization device to perform equalization operations on the batteries in the battery pack according to the equalization situation.

[0020] Optionally, the collecting the performance data of each battery in the battery pack includes at least one of the following:

[0021] Collect the voltage data at both ends of the battery in the static state through the lead-acid battery equalization device;

[0022] Control the battery to perform constant-voltage discharge, and record the voltage difference after and before discharge;

[0023] Perform constant-voltage charging on the battery, and record the voltage difference after and before charging.

[0024] Optionally, the analyzing the performance data of each battery to determine the equalization situation in the battery pack includes:

[0025] Compare the voltage data of the batteries pairwise. If the voltage difference between the batteries is greater than the preset voltage difference threshold, it is determined that the battery pack is unbalanced, and the battery with voltage data lower than that of another battery is determined as the battery to be balanced.

[0026] Optionally, the analyzing the performance data of each battery to determine the equalization situation in the battery pack includes:

[0027] Calculate the voltage reduction rate according to the voltage difference after and before discharge and the discharge time;

[0028] Compare the voltage reduction rates pairwise. If the difference between the voltage reduction rates is greater than the preset reduction rate threshold, it is determined that the battery pack is unbalanced, and the battery with a voltage reduction rate higher than that of another battery is determined as the battery to be balanced.

[0029] Optionally, analyzing the performance data of each battery to determine the balance situation in the battery pack includes:

[0030] Calculating the voltage rise rate according to the voltage difference and charging time before and after charging;

[0031] Comparing the voltage rise rates pairwise. If the difference in voltage rise rates is greater than a preset rise rate threshold, it is determined that the battery pack is unbalanced, and the battery with a voltage rise rate higher than that of another battery is determined as the battery to be balanced.

[0032] Optionally, controlling the lead-acid battery equalization device to perform equalization operations on the batteries in the battery pack includes:

[0033] Statistical analysis of the voltage values of the batteries in the battery pack to obtain the equalization target voltage value;

[0034] Controlling the lead-acid battery equalization device to charge the battery to be equalized;

[0035] Monitoring the voltage data of the battery to be equalized and stopping charging when the voltage data reaches the equalization target voltage value.

[0036] Optionally, the statistical analysis of the voltage values of the batteries in the battery pack to obtain the equalization target voltage value includes:

[0037] Calculating the average voltage according to the voltage values of the batteries in the battery pack;

[0038] Determining the equalization target voltage value according to the average voltage and the lowest voltage value.

[0039] To achieve the above object, an embodiment of the third aspect of the present application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0040] The memory stores computer-executable instructions;

[0041] The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of the first aspect.

[0042] To achieve the above object, an embodiment of the fourth aspect of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, they are used to implement the method according to any one of the first aspect.

[0043] To achieve the above object, an embodiment of the fifth aspect of the present application provides a computer program product, and when the computer program is executed by a processor, it implements the method according to any one of the first aspect.

[0044] The lead-acid battery balancing method, device, electronic device and storage medium provided in the present application realize the detection of the balancing condition of the battery pack through the performance data of the battery, and perform balancing operations on the battery pack in a timely manner, thereby avoiding the reduction of operating efficiency due to unbalanced battery packs and improving the operating efficiency of the battery pack.

[0045] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0047] Figure 1 A schematic diagram of the structure of a lead-acid battery equalization device provided in an embodiment of the present application;

[0048] Figure 2 A schematic diagram of the structure of a lead-acid battery equalization device provided in an embodiment of the present application;

[0049] Figure 3 A schematic diagram of a flow chart of a lead-acid battery equalization method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0051] In modern power systems, hydropower plants play a vital role, and their stable operation is essential to ensuring energy supply and grid security. As a key auxiliary equipment of hydropower plants, the performance of the DC operating power supply system is directly related to the emergency response capability and long-term operation safety of the power plant. As the core of the DC operating power supply system, the performance and life of lead-acid batteries directly affect the stability and economy of the entire system. However, lead-acid batteries usually face problems such as uneven performance of single cells, changes in ambient temperature, and improper charging methods in long-term operation. These problems will cause battery performance degradation and shortened life, increase maintenance costs, and even affect the safe operation of the power system at critical moments. Therefore, how to effectively extend battery life and improve the reliability of the DC operating power supply system has become a key issue that needs to be solved in the operation and maintenance management of hydropower plants.

[0052] To address this problem, the present application proposes a lead-acid battery equalization device.Figure 1 This is a schematic structural diagram of a lead-acid battery equalization device provided by an embodiment of the present application. As Figure 1 shown, the device includes: an anti-reverse connection circuit 1, an auxiliary power circuit 2, a control circuit 3, a sampling circuit 4, a communication circuit 5, and a dual active bridge conversion circuit 6;

[0053] The anti-reverse connection circuit is connected to the battery terminal, and the battery terminal is connected to an external battery;

[0054] The anti-reverse connection circuit is connected to the dual active bridge conversion circuit;

[0055] The dual active bridge conversion circuit is connected to the DC high-voltage terminal, and the DC high-voltage terminal is connected to the DC bus;

[0056] The auxiliary power circuit is connected to the battery terminal, the DC high-voltage terminal, and the control circuit, and the auxiliary power circuit is used to supply power to the control circuit;

[0057] The control circuit is connected to the dual active bridge conversion circuit, the sampling circuit, and the communication circuit, and is used to receive information sent by other circuits and control the operation of other circuits.

[0058] In this embodiment, the anti-reverse connection circuit is a protection circuit, which is used to prevent the battery from being connected with reverse polarity when it is connected, so as to avoid damaging the entire circuit.

[0059] The dual active bridge conversion circuit DAB is a dual active bridge inverter. Different from the operation mode of the traditional DC, it mainly adopts phase-shift control, that is, by changing the lead-lag relationship between the primary side and the secondary side, the flow of energy is realized. The control of the transmission power and the output voltage can be achieved by controlling the duty ratios of the two AC square-wave voltages Vab and Vcd and the phase difference between Vab and Vcd. Working principle: Fix the internal phase-shift angle and control the external phase-shift angle. If the output lags behind the input in phase angle, it is forward transmission. If the input lags behind the output in phase angle, it is reverse transmission.

[0060] Auxiliary power circuit: The battery supplies power and boosts the voltage to supply power to the control circuit and the drive power supply, etc.; after the output voltage is established, it is isolated and stepped down and then bypasses the battery voltage boost circuit.

[0061] The control circuit mainly generates waves for driving the power tubes of the dual active bridge DAB and controls the working logic of the system.

[0062] The sampling circuit is used to collect parameters such as the voltage, current, and temperature of the battery, and provide real-time data for the control circuit.

[0063] The communication circuit is used to realize data communication between the lead-acid battery equalization device and other devices, which is convenient for remote monitoring and management.

[0064] Optionally, the lead-acid battery equalization device is connected in parallel with a single battery in the battery pack.

[0065] Figure 2 FIG. is a schematic structural diagram of a lead-acid battery equalization device provided by an embodiment of the present application; as Figure 2 shown, multiple batteries are connected in series to form a battery pack. The electric switch device: is controlled to act through monitoring, eliminating the need for manual operation by the operator, reducing misoperation, and also reducing the number of switches. The lead-acid battery equalization device is connected in parallel with a single battery, and can perform capacity verification, BMS detection, charge and discharge management, and battery repair on it alone, increasing the reliability of the system.

[0066] Working logic: When operating normally, the lead-acid battery equalization device is on standby, and the electric switch device is closed. After N batteries are connected in series, they are connected to the DC bus through the electric switch device to supply power to the subsequent equipment load. When the system needs to detect the equalization situation, the monitoring issues a capacity verification command, and the lead-acid battery equalization device starts to act. At the same time, the electric switch device is opened, cutting off the battery series circuit, and the working mode changes to parallel operation. The lead-acid battery equalization device performs equalization detection on the battery monomers and performs equalization operations. Then, the electric switch device is closed, and the lead-acid battery equalization device is on standby, and the working mode switches back to series operation.

[0067] An embodiment of the present application provides a lead-acid battery equalization method. Figure 3 FIG. is a schematic flow diagram of a lead-acid battery equalization method provided by an embodiment of the present application. As Figure 3 shown, the method includes the following steps:

[0068] Step 301, in response to the start of equalization detection, disconnect the connection between the battery pack and the external circuit, and collect the performance data of each battery in the battery pack;

[0069] Step 302, analyze the performance data of each battery to determine the equalization situation in the battery pack;

[0070] Step 303, control the lead-acid battery equalization device to perform equalization operations on the batteries in the battery pack according to the equalization situation.

[0071] By disconnecting the connection between the battery pack and the external circuit, the accuracy of the detection data is ensured; then, in-depth analysis is performed on the collected performance data to accurately judge the equalization state of the battery pack; finally, according to the analysis results, targeted equalization operations are performed on the batteries in the battery pack, realizing comprehensive management and maintenance of the battery pack, effectively extending the service life of the battery pack, and improving its reliability and performance.

[0072] Optionally, the collecting the performance data of each battery in the battery pack includes at least one of the following:

[0073] Collect the voltage data at both ends of the battery in the static state through the lead-acid battery equalization device;

[0074] Control the battery to perform constant-voltage discharge, and record the voltage difference after and before discharge;

[0075] Perform constant-voltage charging on the battery, and record the voltage difference after and before charging.

[0076] In this embodiment, a variety of methods for collecting battery performance data are provided, including the voltage data at both ends in the static state, the voltage difference before and after constant-voltage discharge, and the voltage difference before and after constant-voltage charging. These data from different dimensions can comprehensively reflect the performance characteristics of the battery under different working conditions, provide rich and accurate information for subsequent equalization analysis, and help to more comprehensively and deeply evaluate the state and equalization requirements of the battery.

[0077] Optionally, the analysis based on the performance data of each battery to determine the equalization situation in the battery pack includes:

[0078] Compare the voltage data of the batteries pairwise. If the voltage difference between the batteries is greater than the preset voltage difference threshold, it is determined that the battery pack is unbalanced, and the battery with a voltage data lower than that of another battery is determined as the battery to be balanced.

[0079] In this embodiment, in the ideal equalization state, the static voltages of all batteries should be the same. If the voltage difference exceeds a certain range, such as more than 30 mV for lithium-ion batteries and more than 50 mV for lead-acid batteries, it indicates that the battery pack is unbalanced.

[0080] Optionally, the analysis based on the performance data of each battery to determine the equalization situation in the battery pack includes:

[0081] Calculate the voltage reduction rate according to the voltage difference and discharge time after and before discharge;

[0082] Compare the voltage reduction rates pairwise. If the difference between the voltage reduction rates is greater than the preset reduction rate threshold, it is determined that the battery pack is unbalanced, and the battery with a voltage reduction rate higher than that of another battery is determined as the battery to be balanced.

[0083] In this embodiment, a constant discharge current is set for the battery, such as 0.5C or 1C, and the current is ensured to be stable during the discharge process.

[0084] Monitoring voltage changes: During the discharging process, regularly record the voltage of each battery, such as once every minute or every five minutes, until the battery pack finishes discharging. Observe the rate of voltage drop and the curve shape of each battery. If the voltage of a certain battery drops significantly faster than that of other batteries, it may have a lower capacity or a poorer health condition, resulting in imbalance; at the same time, compare the cut-off voltages of each battery, and a large difference also indicates imbalance.

[0085] Optionally, the analysis based on the performance data of each battery to determine the balance situation in the battery pack includes:

[0086] Calculate the voltage rise rate based on the voltage difference before and after charging and the charging time;

[0087] Compare the voltage rise rates pairwise. If there is a difference in voltage rise rates greater than the preset rise rate threshold, determine that the battery pack is unbalanced, and determine the battery with a higher voltage rise rate than another battery as the battery to be balanced.

[0088] In this embodiment, the lead-acid battery equalization device is used to charge the corresponding battery, set a constant charging current, such as 0.5C or 1C, and ensure stable current during the discharging process.

[0089] During the charging process, regularly record the voltage of each battery, such as once every minute or every five minutes, until the battery pack is fully charged.

[0090] Observe the rate of voltage rise and the curve shape of each battery. If the voltage of a certain battery rises significantly faster than that of other batteries, it may have a lower capacity or a poorer health condition, resulting in imbalance; at the same time, compare the voltages of each battery when fully charged, and a large difference also indicates imbalance.

[0091] By calculating the voltage drop rate of the battery during the constant-voltage discharging process and making pairwise comparisons, the performance differences of the batteries in the dynamic discharging state can be evaluated more accurately. This method not only considers the static voltage of the battery but also pays attention to its dynamic performance during the actual discharging process, which helps to discover those batteries that seem normal under static voltage but have differences in dynamic performance, providing a more reliable and accurate basis for the equalization operation.

[0092] In this embodiment, an active equalization strategy is adopted to charge the low-capacity battery to increase its capacity to catch up with the high-capacity battery, and such equalization efficiency is relatively high.

[0093] Optionally, the control of the lead-acid battery equalization device to perform equalization operations on the batteries in the battery pack according to the equalization situation includes:

[0094] Statistically analyze the voltage values of the batteries in the battery pack and obtain the equalization target voltage value;

[0095] Control the lead-acid battery equalization device to charge the battery to be equalized;

[0096] Monitor the voltage data of the battery to be equalized, and stop charging when the voltage data reaches the equalization target voltage value.

[0097] Optionally, the step of statistically analyzing the voltage values of the batteries in the battery pack to obtain the equalization target voltage value includes:

[0098] Calculate the average voltage according to the voltage values of the batteries in the battery pack;

[0099] Determine the equalization target voltage value according to the average voltage and the lowest voltage value.

[0100] In this embodiment, the voltage measurement values of all batteries are added up and divided by the number of batteries to obtain the average voltage of the battery pack. This can be used as a preliminary reference for the target voltage. On the basis of calculating the average voltage, the target voltage is fine-tuned in combination with the voltage distribution range and battery characteristics. If the voltage difference is large, the target voltage is set between the average voltage and the lowest voltage to ensure that the low-voltage battery will not be over-discharged.

[0101] If there is historical voltage data of the battery pack, the voltage change situation in different working cycles can be compared and analyzed. If the voltage distribution of the battery pack is relatively stable and balanced in the past working cycles, the voltage value in the historical balanced state can be used as a reference for the target voltage of this equalization operation.

[0102] By calculating the average voltage of the batteries in the battery pack and combining it with the lowest voltage value to determine the equalization target voltage value, the overall voltage level and the lowest voltage limit of the battery pack are comprehensively considered, making the equalization target more scientific and reasonable. This method can not only ensure the voltage consistency of the battery pack after equalization, but also avoid the problems of overcharging or undercharging of the battery caused by setting too high or too low an equalization target, optimizing the equalization effect of the battery pack.

[0103] To implement the above embodiments, the present application also provides an electronic device, including: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method provided in the foregoing embodiments.

[0104] To implement the above embodiments, the present application also provides a computer-readable storage medium storing computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the method provided in the foregoing embodiments.

[0105] To implement the above embodiments, the present application also provides a computer program product, including a computer program which, when executed by a processor, implements the methods provided in the foregoing embodiments.

[0106] The collection, storage, use, processing, transmission, provision, and disclosure of the user's personal information involved in the present application all comply with the provisions of relevant laws and regulations and do not violate public order and good customs.

[0107] It should be noted that personal information from users should be collected for legal and reasonable purposes and should not be shared or sold outside of these legal uses. In addition, such collection / sharing should be carried out after obtaining the informed consent of the user, including but not limited to notifying the user to read the user agreement / user notice and signing an agreement / authorization including authorizing relevant user information before the user uses the function. In addition, any necessary steps should be taken to safeguard and protect access to such personal information data and ensure that others with access to the personal information data comply with their privacy policies and procedures.

[0108] The present application anticipates providing embodiments that allow users to selectively block the use or access of personal information data. That is, the present disclosure anticipates providing hardware and / or software to prevent or block access to such personal information data. Once personal information data is no longer needed, the risk can be minimized by restricting data collection and deleting the data. In addition, when applicable, personal identifiers are removed from such personal information to protect the privacy of the user.

[0109] In the description of the foregoing embodiments, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0110] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0111] Any process or method description represented in a flowchart or otherwise described herein can be understood to represent a module, segment, or portion of code including one or more executable instructions for implementing a customized logical function or process. The scope of the preferred embodiments of the present application includes additional implementations, where functions may be executed in a substantially simultaneous manner or in a reverse order according to the functions involved, rather than in the order shown or discussed, which should be understood by those skilled in the art to which the embodiments of the present application pertain.

[0112] Logic and / or steps represented in a flowchart or otherwise described herein, for example, can be considered a sequenced list of executable instructions for implementing a logical function, and can be embodied specifically 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, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a 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 include the following: an electrical connection having one or more wires (electronic device), 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). Additionally, the computer-readable medium can even be paper or other suitable medium on which the program can be printed, as the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpretation, or other suitable processing as necessary, and then stored in a computer memory.

[0113] It should be understood that various parts of the present application can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by 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, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0114] Those of ordinary skill in the art can understand that all or part of the steps carried out in the method of the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0115] In addition, each functional unit in various embodiments of the present application can be integrated in a processing module, or each unit can exist physically alone, or two or more units can be integrated in a module. The above integrated module can be implemented in the form of hardware or in the form of a software functional module. When the above integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0116] The above-mentioned storage medium can be a read-only memory, a magnetic disk, an optical disc, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A lead-acid battery equalization device, characterized in that: include: Anti-reverse connection circuit, auxiliary source circuit, control circuit, sampling circuit, communication circuit, dual active bridge conversion circuit; The anti-reverse connection circuit is connected to a battery terminal, and the battery terminal is connected to an external battery; The anti-reverse connection circuit is connected to the dual active bridge conversion circuit; The dual active bridge conversion circuit is connected to a DC high voltage terminal, and the DC high voltage terminal is connected to a DC bus; The auxiliary source circuit is connected to the battery terminal, the DC high voltage terminal and the control circuit, and the auxiliary source circuit is used to supply power to the control circuit; The control circuit is connected with the dual active bridge converter, the sampling circuit and the communication circuit, and is used for receiving information sent by other circuits and controlling the operation of other circuits.

2. The device according to claim 1, characterized in that The lead-acid battery balancing device is connected in parallel with individual batteries in the battery pack.

3. A lead-acid battery equalization method, characterized in that: The lead-acid battery equalization device according to claim 1 or 2 comprises the following steps: In response to starting the equalization detection, disconnecting the battery pack from the external circuit, and collecting performance data of each battery in the battery pack; Analyze the performance data of each battery to determine the balancing status of the battery pack; The lead-acid battery balancing device is controlled to perform a balancing operation on the batteries in the battery pack according to the balancing situation.

4. The method according to claim 3, characterized in that The collecting of performance data of each battery in the battery pack includes at least one of the following: The lead-acid battery equalization device is used to collect voltage data at both ends of the battery in a static state; Control the battery to discharge at a constant voltage and record the voltage difference before and after discharge; The battery is charged at a constant voltage and the voltage difference before and after charging is recorded.

5. The method according to claim 4, characterized in that The analyzing the performance data of each battery to determine the balancing status of the battery pack includes: The voltage data of the batteries are compared in pairs. If there is a voltage difference between the batteries that is greater than a preset voltage difference threshold, it is determined that the battery group is unbalanced, and the battery whose voltage data is lower than the voltage data of another battery is determined as a battery to be balanced.

6. The method according to claim 4, characterized in that The analyzing the performance data of each battery to determine the balancing status of the battery pack includes: Calculate the voltage reduction rate based on the voltage difference between before and after discharge and the discharge time; The voltage reduction speeds are compared in pairs. If the difference in voltage reduction speed is greater than a preset reduction speed threshold, it is determined that the battery pack is unbalanced, and the battery with a voltage reduction speed higher than the voltage reduction speed of another battery is determined as the battery to be balanced.

7. The method according to claim 4, characterized in that The analyzing the performance data of each battery to determine the balancing status of the battery pack includes: Calculate the voltage increase rate based on the voltage difference before and after charging and the charging time; The voltage increase rates are compared in pairs. If the difference in voltage increase rates is greater than a preset increase rate threshold, it is determined that the battery pack is unbalanced, and the battery with a voltage increase rate higher than the voltage increase rate of another battery is determined as the battery to be balanced.

8. The method according to any one of claims 5 to 7, characterized in that: The controlling the lead-acid battery balancing device to perform a balancing operation on the batteries in the battery pack according to the balancing situation comprises: Counting the voltage values ​​of the batteries in the battery pack and analyzing to obtain a balanced target voltage value; Controlling the lead-acid battery equalization device to charge the battery to be equalized; The voltage data of the battery to be balanced is monitored, and charging is stopped when the voltage data reaches the balanced target voltage value.

9. The method according to claim 8, characterized in that The counting of the voltage values ​​of the batteries in the battery pack and analyzing to obtain the balanced target voltage value includes: Calculating a voltage average value according to voltage values ​​of batteries in the battery pack; The balanced target voltage value is determined according to the voltage average value and the lowest value of the voltage values.

10. A lead-acid battery equalization device, characterized in that: include: A detection module, configured to disconnect the battery pack from an external circuit in response to starting the equalization detection, and collect performance data of each battery in the battery pack; An analysis module, configured to analyze the performance data of each battery to determine a balancing condition in the battery pack; The balancing module is used to control the lead-acid battery balancing device to perform balancing operations on the batteries in the battery pack according to the balancing situation.

11. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 3 to 9.

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