Battery equalization test system, method, device and equipment and storage medium

Abstract

The invention relates to the technical field of battery management, and provides a battery equalization test system, method, device and equipment and a storage medium, and the battery equalization test system comprises a first battery management module, a second battery management module, a tool collection module, a to-be-tested collector, a simulation cell module and a control module. The tool acquisition module and the to-be-tested collector are connected to the simulation cell module. The collector to be tested is in communication connection with the control module through the first battery management module; the tool acquisition module is selectively connected to a collector to be tested or is in communication connection with the control module through the second battery management module; when an equalization test instruction is received, the control module controls the tool acquisition module to be connected to the second battery management module, and the tool acquisition module is configured to acquire a first voltage signal of the simulation cell module and send the first voltage signal to the control module through the second battery management module for analysis. The accuracy of the test data can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery management, and in particular to a battery equalization test system, method, device, equipment and storage medium. BACKGROUND

[0002] In a battery management system (BMS), a battery voltage and temperature acquisition module is one of the core components, which is mainly used for real-time acquisition of key parameters such as voltage and temperature of battery monomers, and uploading data to a master BMS module through a daisy chain communication mode. When the voltages of the monomers in the battery pack are inconsistent, a balancing resistor can be connected between the positive and negative electrodes of the battery with higher voltage through the control of an MCU to consume the energy of the battery, that is, the balancing function is passively started, so as to improve the cycle life and use safety of the battery pack.

[0003] In order to test the balancing function of the battery voltage and temperature acquisition module, an analog cell is usually constructed by using a voltage dividing resistor network, and an equivalent voltage signal is generated by the voltage dividing resistor for the battery voltage and temperature acquisition module to sample, that is, the battery voltage and temperature acquisition module collects data across the balancing resistor.

[0004] Although this method can reduce costs, most analog front-end (AFE) chips used by the battery voltage and temperature acquisition module have inherent constraints in architecture, so that the battery voltage and temperature acquisition module cannot complete the sending of the balancing control instruction and the high-precision acquisition of the battery voltage at the same time. When the battery voltage and temperature acquisition module starts the balancing operation, the internal circuit state of the analog cell has changed, so that the battery voltage and temperature acquisition module cannot obtain the real balancing process data of the analog cell, and thus the battery voltage and temperature acquisition module cannot determine whether the balancing function is truly effective by collecting data by itself. SUMMARY

[0005] Embodiments of the present application provide a battery equalization test system, method, device, equipment and storage medium, which aims to solve the problem that the traditional test method only relies on the same battery voltage and temperature acquisition module to complete the sending of the instruction and the collection of the data at the same time, but the timing of the analog front-end chip limits the real-time data collection during the balancing execution.

[0006] In a first aspect, embodiments of the present application provide a battery equalization test system, which comprises: a first battery management module, a second battery management module, a tool acquisition module, a to-be-tested acquisition module, an analog cell module and a control module. The tool acquisition module and the to-be-tested acquisition device are connected to the analog battery cell module; the to-be-tested acquisition device is in communication connection with the control module through the first battery management module; the tool acquisition module is selectively connected to the to-be-tested acquisition device or in communication connection with the control module through the second battery management module; When receiving the equalization test instruction, the control module controls the tool acquisition module to be connected to the second battery management module, and the tool acquisition module is configured to acquire a first voltage signal of the analog battery cell module and send the first voltage signal to the control module for analysis through the second battery management module.

[0007] A further technical solution is that, when receiving the data acquisition instruction, the control module controls the tool acquisition module to be connected to the to-be-tested acquisition device, and the tool acquisition module and the to-be-tested acquisition device are respectively configured to acquire a second voltage signal of a resistor on the analog battery cell module, and the voltage signal acquired by the tool acquisition module is sent to the first battery management module through the to-be-tested acquisition device.

[0008] A further technical solution is that, the battery equalization test system further comprises a first power module and a second power module; When receiving the equalization test instruction, the first power module is connected to the first battery management module and the second battery management module, and the second power module is connected to the analog battery cell module. When receiving the data acquisition instruction, the first power module is connected to the first battery management module, and the second power module is connected to the analog battery cell module.

[0009] A further technical solution is that, the to-be-tested acquisition device comprises an equalization resistor unit and a start switch unit, the analog battery cell module comprises a thermistor unit, the equalization resistor unit comprises at least two equalization resistors connected in series, the thermistor unit comprises at least two thermistors connected in series, and the start switch unit comprises at least two start switches. Each equalization resistor is connected in parallel to the thermistor through a corresponding start switch.

[0010] In a second aspect, the application provides a battery equalization test method applied to a control module of the battery equalization test system, and the battery equalization test method comprises the following steps: When receiving the equalization test instruction, the control module controls the tool acquisition module to be connected to the second battery management module; The equalization resistors in the to-be-tested acquisition device are used to divide voltage and equalize the analog battery cell module; The first voltage signal of the analog battery module after being balanced is collected by using the tooling collection module. Based on the first voltage signal, an equalization test result of the tooling collection module is obtained.

[0011] Further, the first voltage signal includes an equalization voltage value of the equalization resistor and an unequilibrium voltage value of the non-equalization resistor, and the equalization test result of the tooling collection module is obtained based on the voltage signal, including: If the ratio of the equalization voltage value to the unequilibrium voltage value is equal to a preset proportion coefficient, the obtained equalization test result is normal. If the ratio of the equalization voltage value to the unequilibrium voltage value is not equal to the preset proportion coefficient, the obtained equalization test result is abnormal.

[0012] Further, the method further includes: When the data collection instruction is received, the tooling collection module is connected to the to-be-tested collector. The second voltage signal of the resistor on the analog battery module collected by the tooling collection module and the to-be-tested collector is received. Based on the second voltage signal, a data collection test result of the to-be-tested collector is obtained.

[0013] In a third aspect, the embodiments of the present application further provide a battery equalization test device, which includes units for executing the above method.

[0014] In a fourth aspect, the embodiments of the present application further provide a computer device, which includes a memory and a processor, the memory stores a computer program, and the processor implements the above method when executing the computer program.

[0015] In a fifth aspect, the embodiments of the present application further provide a computer readable storage medium, which stores a computer program, and the computer program can implement the above method when being executed by a processor.

[0016] The embodiment of the application provides a battery equalization test system, method, device, equipment and storage medium. The battery equalization test system comprises a first battery management module, a second battery management module, a tool acquisition module, a to-be-tested acquisition device, an analog battery cell module and a control module. The tool acquisition module and the to-be-tested acquisition device are connected to the analog battery cell module. The to-be-tested acquisition device is connected to the control module through the first battery management module. The tool acquisition module can be selectively connected to the to-be-tested acquisition device or connected to the control module through the second battery management module. When receiving an equalization test instruction, the control module controls the tool acquisition module to be connected to the second battery management module. The tool acquisition module is configured to acquire a first voltage signal of the analog battery cell module and send the first voltage signal to the control module through the second battery management module for analysis.

[0017] The embodiment of the application introduces an independent tool acquisition module. When receiving an equalization test instruction, the control module controls the tool acquisition module to be connected to the second battery management module to specially acquire a voltage change signal of the analog battery cell module in the equalization process. The separation of "equalization control" and "equalization test" is realized. That is, the to-be-tested acquisition device is only responsible for starting the equalization test, and the acquisition of voltage data is independently completed by the tool acquisition module. In this way, the accuracy of test data can be improved. The problem that the real data cannot be synchronously acquired during the equalization execution process due to the time sequence limitation of the analog front-end chip is effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the application and, together with the specification, serve to explain the principles of the application.

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative labor.

[0020] One or more embodiments are exemplarily illustrated by pictures in the drawings corresponding to the embodiments. These exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise specified, the drawings do not constitute a proportional limitation.

[0021] Figure 1 A structural schematic diagram of a battery equalization test system provided by the application when testing the equalization function. Figure 2 A structure schematic diagram of a battery equalization test system provided by the application in a test data acquisition function; Figure 3 A structure schematic diagram of the battery equalization test system provided by the application in a test data acquisition function; Figure 1 A structure schematic diagram when provided with the first power module and the second power module; Figure 4 A structure schematic diagram of the battery equalization test system provided by the application in a test data acquisition function; Figure 2 A structure schematic diagram when provided with the first power module and the second power module; Figure 5 A connection schematic diagram of a to-be-tested collector and an analog battery cell module when performing equalization test by the battery equalization test system provided by the application; Figure 6 A flow schematic diagram of a first embodiment of a battery equalization test method provided by the application; Figure 7 A structure schematic diagram of a computer device provided by the embodiment of the application.

[0022] Explanation of reference numerals: Battery equalization test system 10, first battery management module 100, second battery management module 200, tool collection module 300, to-be-tested collector 400, analog battery cell module 500, control module 600, first power module 700, and second power module 800. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the embodiments of the application clearer, the technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0024] The following disclosure provides many different embodiments or examples for implementing different structures of the application. In the interest of simplifying the present disclosure, the description in the following text describes the components and settings of specific examples. Of course, they are only examples, and the purpose is not to limit the application. In addition, the application can repeatedly refer to numerals and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings being discussed.

[0025] It should be understood that when used in the specification and the appended claims, the terms “comprise” and “include” indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or sets thereof.

[0026] It should also be understood that the terms used in the specification herein are for the purpose of describing particular embodiments and do not intend to limit the application. As used in the specification and the appended claims herein, the singular forms "a," "an" and "the" are intended to include plural forms unless the context clearly dictates otherwise.

[0027] It should be further understood that the term "and / or" used in the specification and the appended claims herein is intended to refer to any combination of one or more of the associated listed items and all possible combinations thereof.

[0028] As used in this specification and the appended claims, the term "if" can be interpreted as meaning "when" or "once" or "in response to determining" or "in response to detecting" depending on the context. Similarly, the phrase "if it is determined" or "if [the described condition or event] is detected" can be interpreted as meaning "once it is determined" or "in response to determining" or "once [the described condition or event] is detected" or "in response to detecting [the described condition or event]" depending on the context.

[0029] In a battery management system (BMS), a battery voltage and temperature acquisition module is one of the core components, which is mainly used to collect real-time voltage, temperature and other key parameters of battery monomers, and upload data to the main control BMS module through daisy chain communication mode. When the voltages of the monomers in the battery pack are inconsistent, a balancing resistor can be connected between the positive and negative electrodes of the battery with higher voltage through the control of the MCU to consume the energy of the battery, i.e. to passively start the balancing function, thereby improving the cycle life and use safety of the battery pack.

[0030] In order to test the balancing function of the battery information acquisition module, the existing battery information acquisition module test scheme usually connects the battery information acquisition module to a simulated battery or a physical battery, and judges whether the battery information acquisition module works normally through the connection of the battery management system. Although this scheme can test the function of the battery information acquisition module, the cost is relatively high.

[0031] In order to reduce the cost, the related technical scheme adopts a voltage dividing resistor network to construct a simulated battery cell, generates an equivalent voltage signal through the voltage dividing resistor for the battery information acquisition module to sample, i.e. uses the battery information acquisition module to collect the data between the two ends of the balancing resistor.

[0032] Although this way can reduce the cost, due to inherent constraints in the architecture of the analog front-end (AFE) chip used by most battery information collectors, the battery information collector cannot complete the sending of the equalization control instruction and the high-precision collection of the battery voltage at the same time, and when the battery information collector starts the equalization operation, the analog chip internal circuit state has changed, causing the battery information collector to be unable to obtain the real equalization process data of the analog chip, so that the battery information collector cannot judge whether the equalization is truly effective through its own data collection.

[0033] To solve the above problems, the application provides a battery equalization test system, which can realize the separation of "equalization control" and "equalization test", that is, the collector under test is only responsible for sending the equalization test instruction, and the collection of voltage data is independently completed by the tool collection module, so that the accuracy of the test data can be improved.

[0034] Referring to Figure 1 , Figure 1 An embodiment structure block diagram of a battery equalization test system 10 provided by the application is provided, the battery equalization test system 10 includes a first battery management module 100, a second battery management module 200, a tool collection module 300, a collector under test 400, an analog chip module 500 and a control module 600.

[0035] The tool collection module 300 and the collector under test 400 are both connected to the analog chip module 500; the collector under test 400 is in communication connection with the control module 600 through the first battery management module 100; the tool collection module 300 can be selectively connected to the collector under test 400 or in communication connection with the control module 600 through the second battery management module 200; When receiving the equalization test instruction, the control module 600 controls the tool collection module 300 to be connected to the second battery management module 200, and the tool collection module 300 is configured to collect the first voltage signal of the analog chip module 500 and send the first voltage signal to the control module 600 for analysis through the second battery management module 200.

[0036] The embodiment introduces an independent tool acquisition module 300, and when receiving an equalization test instruction, the control module 600 controls the tool acquisition module 300 to be connected to the second battery management module 200, for collecting the voltage change signal of the analog battery module 500 in the equalization process, so as to separate the "equalization control" and the "equalization test", that is, the to-be-tested collector 400 is only responsible for starting the equalization test, and the voltage data acquisition is independently completed by the tool acquisition module 300. In this way, the accuracy of the test data can be improved, and the problem that the real data cannot be collected synchronously in the equalization execution process due to the time sequence limitation of the analog front-end chip in the traditional test mode of simultaneously completing the instruction sending and the data acquisition by relying on the same battery information collector can be effectively improved.

[0037] In addition, for the verification of the battery equalization function, the existing test system usually collects the current in the equalization loop of the analog battery to judge the equalization function, but this mode needs additional current detection hardware, so that the cost is relatively high, and the test process is relatively complex.

[0038] In addition, when the to-be-tested collector 400 receives the equalization test instruction to start the equalization test, the voltage of the analog battery module 500 will change, so the embodiment directly tracks and samples the voltage of the analog battery module 500 through the tool acquisition module 300. In this way, the equalization test function can be realized by directly predicting the voltage change, the equalization function is judged by collecting the current in the equalization loop of the analog battery, the cost is reduced, and the test efficiency is improved.

[0039] In some possible implementation manners, the control module 600 can be implemented by a personal computer (PC). By recording, analyzing and managing the test information, the collected data and the parameter threshold value by the PC, a complete automatic test process can be constructed. During the test process, the data is uploaded to the PC in real time and saved, which not only reduces the manual intervention and reduces the risk of human error operation, but also effectively improves the production test efficiency.

[0040] Referring to Figure 2 In some possible implementation manners, when receiving a data acquisition instruction, the control module 600 controls the tool acquisition module 300 to be connected to the to-be-tested collector 400, the tool acquisition module 300 and the to-be-tested collector 400 are respectively configured to collect the second voltage signal of the resistor on the analog battery module 500, and the voltage signal collected by the tool acquisition module 300 is sent to the first battery management module 100 through the to-be-tested collector 400.

[0041] Referring to Figure 3 and Figure 4In some possible embodiments, the battery equalization test system 10 comprises a first battery management module 100, a second battery management module 200, a tool acquisition module 300, a to-be-tested acquisition device 400, an analog battery cell module 500, a control module 600, a first power supply module 700 and a second power supply module 800.

[0042] The tool acquisition module 300 and the to-be-tested acquisition device 400 are both connected to the analog battery cell module 500; the to-be-tested acquisition device 400 is in communication connection with the control module 600 through the first battery management module 100; the tool acquisition module 300 is selectively connected to the to-be-tested acquisition device 400 or in communication connection with the control module 600 through the second battery management module 200.

[0043] As shown in Figure 3 When receiving an equalization test instruction, the control module 600 controls the tool acquisition module 300 to be connected to the second battery management module 200, and the tool acquisition module 300 is configured to acquire a first voltage signal of the analog battery cell module 500 and send the first voltage signal to the control module 600 for analysis through the second battery management module 200; the first power supply module 700 is connected to the first battery management module 100 and the second battery management module 200, and the second power supply module 800 is connected to the analog battery cell module 500.

[0044] The first power supply module 700 is configured to supply power to the first battery management module 100 and the second battery management module 200, and the second power supply module 800 is configured to supply power to the analog battery cell module 500.

[0045] As shown in Figure 4 When receiving a data acquisition instruction, the control module 600 controls the tool acquisition module 300 to be connected to the to-be-tested acquisition device 400, and the tool acquisition module 300 and the to-be-tested acquisition device 400 are both configured to acquire a second voltage signal of a resistor on the analog battery cell module 500, and the voltage signal acquired by the tool acquisition module 300 is sent to the first battery management module 100 through the to-be-tested acquisition device 400; the first power supply module 700 is connected to the first battery management module 100, and the second power supply module 800 is connected to the analog battery cell module 500.

[0046] The first power supply module 700 is configured to supply power to the first battery management module 100, and the second power supply module 800 is configured to supply power to the analog battery cell module 500.

[0047] Therefore, by adopting the dual-power independent power supply design of the first power supply module 700 and the second power supply module 800, electrical isolation between the control circuit and the signal source is achieved, and the stability and accuracy of the test system are effectively improved.

[0048] In addition, since the tool collection module 300 is in communication connection with the to-be-tested collector 400 when the data collection instruction is received, the tool collection module 300 at this time is equivalent to another to-be-tested collector, and therefore, the number of to-be-tested collectors can be detected by the second battery management module 200, and it is judged whether the communication of the to-be-tested collector 400 in the to-be-tested collector 400 is normal. Figure 4

[0049] In some possible embodiments, the battery equalization test system 10 comprises a first battery management module 100, a second battery management module 200, a tool collection module 300, a to-be-tested collector 400, an analog cell module 500, a control module 600, a first power supply module 700 and a second power supply module 800, wherein the tool collection module 300 comprises an equalization test collection board and a cascade collection board.

[0050] The tool collection module 300 and the to-be-tested collector 400 are connected to the analog cell module 500; the to-be-tested collector 400 is in communication connection with the control module 600 through the first battery management module 100; When receiving an equalization test instruction, the control module 600 controls the equalization test collection board in the tool collection module 300 to be connected to the second battery management module 200, the equalization test collection board collects a first voltage signal of the analog cell module 500, and sends the first voltage signal to the control module 600 through the second battery management module 200 for analysis; the first power supply module 700 is connected to the first battery management module 100 and the second battery management module 200, and the second power supply module 800 is connected to the analog cell module 500. When receiving a data collection instruction, the control module 600 controls the cascade collection board in the tool collection module 300 to be connected to the to-be-tested collector 400, the cascade collection board and the to-be-tested collector 400 are respectively configured to collect a second voltage signal of a resistor on the analog cell module 500, and the voltage signal collected by the cascade collection board is sent to the first battery management module 100 through the to-be-tested collector 400, the first power supply module 700 is connected to the first battery management module 100, and the second power supply module 800 is connected to the analog cell module 500.

[0051] Referring to Figure 3 and Figure 4 ​In some possible implementation manners, the battery equalization test system 10 further comprises a first CAN bus (i.e. CAN1 in Figure 3 ) and a second CAN bus (i.e. CAN2 in Figure 3 ); the first battery management module 100 is connected to the control module 600 through the first CAN bus; and the second battery management module 200 is connected to the control module 600 through the second CAN bus.

[0052] Referring to Figure 5 , in some possible implementation manners, the to-be-tested collector 400 comprises an equalization resistance unit and a starting switch unit, the analog cell module 500 comprises a thermistor unit, the equalization resistance unit comprises at least two equalization resistances connected in series, the thermistor unit comprises at least two thermistors connected in series, and the starting switch unit comprises at least two starting switches. Each equalization resistance is connected in parallel to the thermistor through a corresponding starting switch.

[0053] For example, as shown in Figure 5 , Figure 5 , R1, R2 and Rn are equalization resistances, R1', R2' and Rn' are thermistors, K1, K2 and Kn are starting switches, R1 is connected in parallel to R1', R2 is connected in parallel to R2', and Rn is connected in parallel to Rn', where the resistance values of R1', R2' and Rn' are all R.

[0054] Based on the above embodiments, the application further provides a battery equalization test method, referring to Figure 6 , Figure 6 , which is a flowchart of a first embodiment of a battery equalization test method provided by the application. The battery equalization test method comprises the following steps: Step 110: when receiving an equalization test instruction, connecting the tool collector module to the second battery management module.

[0055] Step 120: using the equalization resistances in the to-be-tested collector to perform voltage division equalization on the analog cell module.

[0056] Step 130: using the tool collector module to collect a first voltage signal of the analog cell module after being equalized.

[0057] Step 140: obtaining an equalization test result of the tool collector module based on the first voltage signal.

[0058] Specifically, referring to Figure 6The control module receives a user's equalization test instruction, and sends a first control instruction to the first battery management module and a second control instruction to the second battery management module, wherein the first control instruction is used to control the first battery management module to initiate the equalization test instruction, and the second control instruction is used to control the second battery management module to send a battery voltage collection instruction.

[0059] For example, the first battery management module receives the first control instruction of the control module, and sends an equalization test instruction to the to-be-tested collector; the to-be-tested collector receives the equalization test instruction sent by the first battery management module, and controls the equalization switch on the to-be-tested collector to be turned on. Meanwhile, the second battery management module sends a battery voltage collection instruction according to the second control instruction; the tool collection module receives the battery voltage collection instruction sent by the second battery management module, and collects the voltage of the analog battery cell module; and the control module judges whether the voltage meets the requirements according to the voltage data collected by the tool collection module.

[0060] By introducing the independent tool collection module, when receiving the equalization test instruction, the control module controls the tool collection module to be connected to the second battery management module, and is used to specially collect the voltage change signal of the analog battery cell module in the equalization process, so that the separation of "equalization control" and "equalization test" is realized, that is, the to-be-tested collector is only responsible for starting the equalization test, and the collection of the voltage data is independently completed by the tool collection module, so that the accuracy of the test data can be improved, and the problem that the real data cannot be collected synchronously in the equalization execution process due to the time sequence limitation of the analog front-end chip in the traditional test mode is effectively improved.

[0061] In addition, for the verification of the battery equalization function, the existing test system usually collects the current in the equalization loop of the analog battery to judge the equalization function, but this mode needs additional current detection hardware, so that the cost is relatively high, and the test process is relatively complex.

[0062] In addition, when the to-be-tested collector receives the equalization test instruction to start the equalization test, the voltage of the analog battery cell module will change, therefore, the tool collection module directly tracks and samples the voltage of the analog battery cell module, so that the equalization test function can be realized by directly predicting the voltage change, the equalization function is judged by collecting the current in the equalization loop of the analog battery, the cost is reduced, and the test efficiency is improved.

[0063] In some possible implementation manners, the first voltage signal includes an equalization voltage value of the equalization resistor and a non-equalization voltage value of the non-equalization resistor, and the second embodiment can include the following steps: Step 210: When receiving the data collection instruction, the tool collection module is connected to the second battery management module.

[0064] Step 220: The analog cell module is divided and balanced by the balancing resistor in the to-be-tested collector.

[0065] Step 230: The first voltage signal of the analog cell module after balancing is collected by the tool collection module.

[0066] Step 240: If the ratio of the balancing voltage value to the unbalanced voltage value is equal to the preset proportion coefficient, the obtained balancing test result is normal.

[0067] Step 250: If the ratio of the balancing voltage value to the unbalanced voltage value is not equal to the preset proportion coefficient, the obtained balancing test result is abnormal.

[0068] For example, as shown in the figure, assuming that only K1 is closed, R1' is the balancing resistor, and the resistance value of R1' in parallel with R1 is k Figure 5 R, k can be used as the preset proportion coefficient.

[0069] The theoretical voltage value of R1' can be calculated by the following formula 1: V1'= , formula 1.

[0070] Wherein, V1' is the voltage of R1' after balancing by R1, i.e. the balancing voltage value, V is the total voltage of the analog cell module, n is the number of thermistors in the analog cell module, and k is the resistance value of R1' in parallel with R1 relative to R1'.

[0071] The theoretical voltage value of other thermistors such as R2' can be calculated by the following formula 2: V2' = V / (n+k-1), formula 2.

[0072] Wherein, V2' is the voltage of R2', i.e. the unbalanced voltage value.

[0073] According to formula 2 and formula 3, it can be known that under the condition that the resistance R value is determined, the voltage with balancing and the voltage without balancing can be simplified as K times relationship. Under the condition that the external condition is fixed, the calculation result is also relatively fixed, which provides a theoretical basis for setting the sampling voltage range during balancing.

[0074] ​Based on this, when receiving the equalization test instruction, if the tool acquisition module acquires the equalization voltage value V1' of the analog battery module subjected to the equalization resistance and the non-equalization voltage value V2' of the analog battery module not subjected to the equalization resistance, if V1' / V2'=k, that is, the ratio of the equalization voltage value to the non-equalization voltage value is equal to the preset proportion coefficient, the obtained equalization test result is normal.

[0075] In some possible embodiments, when receiving the data acquisition instruction, the voltage data of the analog battery module can be acquired by using the tool acquisition module, and it is determined whether the data acquisition of the to-be-tested collector is normal by using the tool acquisition module. For details, refer to the third embodiment of the battery equalization test method provided in the present application. The third embodiment can include the following steps: Step 310: When receiving the data acquisition instruction, the tool acquisition module is connected to the to-be-tested collector.

[0076] Step 320: The second voltage signal of the resistance on the analog battery module acquired by the tool acquisition module and the to-be-tested collector is received.

[0077] Step 330: Based on the second voltage signal, the data acquisition test result of the to-be-tested collector is obtained.

[0078] The second voltage signal can be a second voltage value.

[0079] For example, it is assumed that the second voltage value of the resistance on the analog battery module acquired by the to-be-tested collector is Vi, and the second voltage value of the resistance on the analog battery module acquired by the tool acquisition module is also Vi'.

[0080] If the consumed current is ignored during acquisition, the theoretical value of Vi can be calculated by using the following formula 3. Vi=V / n, formula 3.

[0081] Vi is the voltage across a certain resistance on the analog battery module, V is the total voltage of the analog battery module, and n is the number of thermistors in the analog battery module.

[0082] In some embodiments, the relationship between Vi and Vi' can be determined to determine whether the data acquisition function of the to-be-tested collector is normal. For example, if Vi=Vi', it can be determined that the data acquisition test result of the to-be-tested collector is normal.

[0083] Corresponding to the above battery equalization test method, the present application further provides a battery equalization test device. The battery equalization test device includes units for executing the above battery equalization test method. The battery equalization test device can be configured in a desktop computer, a tablet computer, a laptop computer, and the like terminal.

[0084] AsFigure 7 As shown, the embodiment of the present application provides a computer device, comprising a processor 111, a communication interface 112, a memory 113 and a communication bus 114, wherein the processor 111, the communication interface 112 and the memory 113 complete mutual communication through the communication bus 114, The memory 113 is used for storing a computer program. In an embodiment of the present application, the processor 111 is used for executing the program stored in the memory 113, and realizes the battery equalization test method provided by any one of the foregoing method embodiments, comprising: When receiving the equalization test instruction, the tool collector module is connected to the second battery management module; The equalization resistance in the to-be-tested collector is used to perform voltage division equalization on the analog battery cell module; The tool collector module is used to collect the first voltage signal of the analog battery cell module after being equalized; Based on the first voltage signal, the equalization test result of the tool collector module is obtained.

[0085] Those skilled in the art can understand that all or part of the processes in the method for implementing the above embodiment can be completed by a computer program instructing related hardware. The computer program can be stored in a storage medium, which is a computer readable storage medium. The computer program is executed by at least one processor in the computer system to realize the process steps of the above method embodiment.

[0086] Therefore, the embodiment of the present application further provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the steps of the battery equalization test method provided by any one of the foregoing method embodiments, comprising: When receiving the equalization test instruction, the tool collector module is connected to the second battery management module; The equalization resistance in the to-be-tested collector is used to perform voltage division equalization on the analog battery cell module; The tool collector module is used to collect the first voltage signal of the analog battery cell module after being equalized; Based on the first voltage signal, the equalization test result of the tool collector module is obtained.

[0087] The storage medium is an entity, non-transient storage medium, for example, can be a U disk, a mobile hard disk, a read-only memory (Read-Only Memory, ROM), a magnetic disk or an optical disk and various entity storage media that can store program codes. The computer readable storage medium can be non-volatile or volatile.

[0088] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware, computer software or a combination of both. In order to clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been described in the above description in a general manner. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0089] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of each unit is only a logical functional division, and actual implementation can have another division manner. For example, a plurality of units or components can be combined or integrated into another system, or some features can be omitted or not executed.

[0090] The steps in the method embodiments of the present application can be adjusted, combined and deleted in sequence according to actual needs. The units in the device embodiments of the present application can be combined, divided and deleted according to actual needs. In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0091] The integrated unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a storage medium. Based on such understanding, the technical solutions of the present application essentially or say the parts that make contributions to the prior art, or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a terminal or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application.

[0092] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0093] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, these modifications and variations of the present application are intended to be included within the scope of the claims of the present application and their equivalent technologies. The present application is also intended to include these modifications and variations.

[0094] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A battery balancing test system, characterized in that: The battery balancing test system includes: A first battery management module, a second battery management module, a tooling acquisition module, a collector to be tested, a simulated battery cell module and a control module; Wherein, the tooling acquisition module and the collector to be tested are both connected to the simulated battery cell module; the collector to be tested is communicatively connected to the control module through the first battery management module; the tooling acquisition module can be selectively connected to the collector to be tested or is communicatively connected to the control module through the second battery management module; When receiving the equalization test indication, the control module controls the tooling acquisition module to connect to the second battery management module. The tooling acquisition module is configured to collect the first voltage signal of the analog battery cell module and send the first voltage signal to the control module through the second battery management module for analysis.

2. The battery balancing test system according to claim 1, wherein: When receiving a data acquisition instruction, the control module controls the tooling acquisition module to connect to the collector to be tested. The tooling acquisition module and the collector to be tested are respectively configured to collect the second voltage signal of the resistor on the simulated battery cell module, and the voltage signal collected by the tooling acquisition module is sent to the first battery management module through the collector to be tested.

3. The battery balancing test system according to claim 1, wherein: The battery balancing test system further includes a first power supply module and a second power supply module; Wherein, when receiving the equalization test instruction, the first power module is connected to the first battery management module and the second battery management module, and the second power module is connected to the simulated battery cell module; When a data acquisition instruction is received, the first power supply module is connected to the first battery management module, and the second power supply module is connected to the simulated battery cell module.

4. The battery balancing test system according to claim 1, wherein: The collector to be tested includes a balancing resistor unit and a start switch unit, the simulated battery module includes a thermistor unit, the balancing resistor unit includes at least two balancing resistors connected in series, the thermistor unit includes at least two thermistors connected in series, and the start switch unit includes at least two start switches; Each of the balancing resistors is connected in parallel to the thermistor via the corresponding starting switch.

5. A battery balancing test method, characterized in that: A control module applied to a battery balancing test system according to any one of claims 1 to 4, wherein the battery balancing test method comprises: When receiving an equalization test instruction, controlling the tooling acquisition module to connect to the second battery management module; Using the balancing resistor in the collector to be tested to perform voltage division and balancing on the simulated battery module; Using the tooling acquisition module to collect the first voltage signal of the simulated battery cell module after being equalized; Based on the first voltage signal, a balance test result of the tooling acquisition module is obtained.

6. The method according to claim 5, characterized in that The first voltage signal includes a balanced voltage value of the balanced resistor and an unbalanced voltage value of the unbalanced resistor. The obtaining of the balanced test result of the tooling acquisition module based on the voltage signal includes: If the ratio of the balanced voltage value to the unbalanced voltage value is equal to the preset proportional coefficient, the obtained balanced test result is normal; If the ratio of the balanced voltage value to the unbalanced voltage value is not equal to the preset proportional coefficient, the obtained balanced test result is abnormal.

7. The method according to claim 5, characterized in that The method further comprises: When receiving a data acquisition instruction, the tooling acquisition module is controlled to connect to the collector to be tested; Receive the second voltage signal of the resistance on the simulated battery cell module respectively collected by the tooling acquisition module and the collector to be tested; A data acquisition test result of the collector to be tested is obtained based on the second voltage signal.

8. A battery balancing test device, characterized in that: The method comprises a unit for executing the method according to any one of claims 5 to 7.

9. A computer device, characterized in that: The computer device includes a memory and a processor, the memory stores a computer program, and the processor implements the method according to any one of claims 5 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that The storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 5 to 7 can be implemented.

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