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

Abstract

The application relates to the battery management technical field and provides a battery equalization test system, a battery equalization test method, a battery equalization test device, a battery equalization test equipment and a 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 both 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 can be 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 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 for analysis through the second battery management module. The application can improve the accuracy of test data.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery management, and particularly relates 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 a battery monomer, and uploading of data to a main control BMS module through a daisy chain communication mode. When the voltages of the monomers in a battery pack are inconsistent, a higher-voltage battery can be connected in series between the positive and negative electrodes of the battery through the control of an MCU, so as to consume the energy of the battery, that is, the equalization function is passively started, so as to improve the cycle life and use safety of the battery pack.

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

[0004] Although this method can reduce the cost, 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 equalization 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 equalization operation, the internal circuit state of the analog cell has changed, so that the battery voltage and temperature acquisition module cannot obtain the real equalization process data of the analog cell, and thus the battery voltage and temperature acquisition module cannot judge whether the equalization 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 real data cannot be collected synchronously in the equalization execution process due to the time sequence limitation of the analog front end chip.

[0006] In a first aspect, an embodiment of the present application provides a battery equalization test system, which comprises:

[0007] 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;

[0008] 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;

[0009] 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.

[0010] Further, 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 resistance 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.

[0011] Further, the battery equalization test system further comprises a first power module and a second power module.

[0012] 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.

[0013] 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.

[0014] Further, the to-be-tested acquisition device comprises an equalization resistance unit and a starting switch unit, the analog battery cell module 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.

[0015] Each equalization resistance is connected in parallel to the thermistor through a corresponding starting switch.

[0016] 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:

[0017] When receiving the equalization test instruction, the control module controls the tool acquisition module to be connected to the second battery management module.

[0018] The analog battery module is divided into voltage balance by using the equalization resistance in the to-be-tested collector;

[0019] The first voltage signal of the analog battery module after being balanced is collected by using the tool collector module;

[0020] The equalization test result of the tool collector module is obtained based on the first voltage signal.

[0021] Further, the first voltage signal includes an equalization voltage value of the equalization resistance and an unequalization voltage value of the non-equalization resistance, and the equalization test result of the tool collector module is obtained based on the voltage signal, including:

[0022] If the ratio of the equalization voltage value to the unequalization voltage value is equal to a preset proportion coefficient, the obtained equalization test result is normal;

[0023] If the ratio of the equalization voltage value to the unequalization voltage value is not equal to the preset proportion coefficient, the obtained equalization test result is abnormal.

[0024] Further, the method further includes:

[0025] When the data collection instruction is received, the tool collector module is connected to the to-be-tested collector;

[0026] The second voltage signal of the resistors on the analog battery module collected by the tool collector module and the to-be-tested collector is received;

[0027] The data collection test result of the to-be-tested collector is obtained based on the second voltage signal.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] The application embodiment 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 in communication connection with 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 in communication connection with 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 for analysis through the second battery management module.

[0032] The application embodiment 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 for acquiring 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, and the problem that the traditional test method only relies on the same battery information acquisition device to simultaneously complete instruction sending and data acquisition but cannot synchronously acquire real data during the equalization execution process due to the timing limitation of the analog front-end chip is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the application and, together with the specification, serve to explain the principles of the application.

[0034] 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 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.

[0035] One or more embodiments are exemplarily illustrated by pictures in the drawings corresponding to the embodiments, and 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.

[0036] Figure 1 A structure schematic diagram of a battery equalization test system provided by the application when testing the equalization function;

[0037] Figure 2 A structure schematic diagram of a battery equalization test system provided by the present application in a test data acquisition function;

[0038] Figure 3 For Figure 1 A structure schematic diagram when provided with a first power module and a second power module;

[0039] Figure 4 For Figure 2 A structure schematic diagram when provided with a first power module and a second power module;

[0040] Figure 5 A connection schematic diagram when a to-be-tested collector and an analog electric core module are equalized and tested by the present application;

[0041] Figure 6 A flow schematic diagram of a first embodiment of a battery equalization test method provided by the present application;

[0042] Figure 7 A structure schematic diagram of a computer device provided by the present application.

[0043] Explanation of reference numerals:

[0044] 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 electric core module 500, control module 600, first power module 700, and second power module 800. DETAILED DESCRIPTION

[0045] To make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0046] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, reference numerals and / or letters can be repeated in different examples in the present application. Such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0047] It should be understood that the terms "comprises" and "comprising," when used in this specification and the following claims, indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0048] It should also be understood that the terms used in the specification and the following claims are merely for the purpose of describing particular embodiments and do not intend to limit the application. As used in the specification and the appended claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0049] It should further be understood that the term "and / or" as used in the specification and the following claims indicates any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0050] As used in the specification and the appended claims, the term "if' can be interpreted as meaning "when" or "once" or "in response to a determination" or "in response to a detection" depending on the context. Similarly, the phrase "if determined" or "if detected [the described condition or event]" can be interpreted to mean "once determined" or "in response to a determination" or "once detected [the described condition or event]" or "in response to a detection [the described condition or event]" depending on the context.

[0051] 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 the voltage, temperature and other key parameters of the battery monomer in real time, and upload the data to the main control BMS module through the 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. the passive start of the balancing function, so as to improve the cycle life and use safety of the battery pack.

[0052] 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.

[0053] In order to reduce the cost, the related technical solution adopts a voltage dividing resistor network to construct an analog battery cell, and an equivalent voltage signal is generated by the voltage dividing resistor for the battery information collector to sample, that is, the battery information collector collects the data between the two ends of the balancing resistor.

[0054] Although this method can reduce the cost, most battery information collectors use analog front-end (AFE) chips that have inherent constraints in their architecture, making it impossible for the battery information collector to complete the transmission of the balancing control instruction and the high-precision collection of the battery voltage at the same time. When the battery information collector starts the balancing operation, the internal circuit state of the analog battery cell has already changed, causing the battery information collector to be unable to obtain the real balancing process data of the analog battery cell, so the battery information collector cannot determine whether the balancing is truly effective by collecting data itself.

[0055] To solve the above problems, the present application provides a battery balancing test system that can separate "balancing control" and "balancing test", that is, the tested collector is only responsible for sending the balancing 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.

[0056] Referring to Figure 1 , Figure 1 An embodiment structure block diagram of a battery balancing test system 10 provided by the present application is provided, which includes a first battery management module 100, a second battery management module 200, a tool collection module 300, a tested collector 400, an analog battery cell module 500, and a control module 600.

[0057] The tool collection module 300 and the tested collector 400 are both connected to the analog battery cell module 500; the tested collector 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 tested collector 400 or in communication connection with the control module 600 through the second battery management module 200;

[0058] When receiving the balancing 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 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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 tool collection module 300 is normal. Figure 4

[0072] 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.

[0073] 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;

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] Each equalization resistance is connected in parallel to the thermistor through a corresponding starting switch.

[0079] 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.

[0080] 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.

[0081] Step 110: when receiving an equalization test instruction, connecting the tool collector module to the second battery management module.

[0082] Step 120: using the equalization resistances in the to-be-tested collector to perform voltage division equalization on the analog cell module.

[0083] Step 130: using the tool collector module to collect a first voltage signal of the analog cell module after being equalized.

[0084] Step 140: based on the first voltage signal, obtaining an equalization test result of the tool collector module.

[0085] 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.

[0086] Exemplarily, 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.

[0087] 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.

[0088] 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, which is used to specially collect the voltage change signal of the analog battery cell module in the equalization process, so as to realize the separation of "equalization control" and "equalization test", 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 can be effectively improved.

[0089] 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, which makes the cost relatively high and the test process relatively complex.

[0090] Moreover, 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.

[0091] 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:

[0092] Step 210: When a data acquisition command is received, the tooling acquisition module is connected to the second battery management module.

[0093] Step 220: Use the equalization resistor in the test acquisition device to perform voltage equalization on the analog battery cell module.

[0094] Step 230: Use the tooling acquisition module to acquire the first voltage signal of the analog battery cell module after it has been equalized.

[0095] Step 240: If the ratio of the balanced voltage value to the unbalanced voltage value is equal to the preset proportional coefficient, then the obtained equalization test result is normal.

[0096] Step 250: If the ratio of the balanced voltage value to the unbalanced voltage value is not equal to the preset proportional coefficient, the obtained equalization test result is abnormal.

[0097] by Figure 5 The following example illustrates this. Assuming only K1 is closed, R1' is the resistor being balanced, and the resistance of R1' connected in parallel with R1 is k. R can use k as a preset proportional coefficient.

[0098] The theoretical voltage value of R1' can be calculated using the following formula 1:

[0099] V1'= , Formula 1.

[0100] Where V1' is the voltage of R1' after being balanced by R1, i.e., the balanced voltage value, V is the total voltage of the simulated cell module, n is the number of thermistors in the simulated cell module, and k is the proportionality coefficient of the resistance of R1' and R1 in parallel with R1'.

[0101] The theoretical voltage value of other thermistors, such as R2', can be calculated using the following formula 2:

[0102] V2'=V / (n+k-1), Formula 2.

[0103] Where V2' is the voltage of R2', i.e., the unbalanced voltage value.

[0104] According to Formulas 2 and 3, under the condition that the resistance R value is determined, the voltage with equalization on and the voltage without equalization can be simplified to a relationship of K times. When the external conditions are fixed, the calculation result is also relatively fixed, which provides a theoretical basis for setting the sampling voltage range during equalization.

[0105] 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.

[0106] 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, which can include the following steps:

[0107] Step 310: When receiving the data acquisition instruction, the tool acquisition module is connected to the to-be-tested collector.

[0108] 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.

[0109] Step 330: Based on the second voltage signal, the data acquisition test result of the to-be-tested collector is obtained.

[0110] The second voltage signal can be a second voltage value.

[0111] 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'.

[0112] If the consumed current is ignored when acquiring, the theoretical value of Vi can be calculated by using the following formula 3:

[0113] Vi=V / n, formula 3.

[0114] 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.

[0115] 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.

[0116] 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, and the battery equalization test device can be configured in a desktop computer, a tablet computer, a laptop computer, or the like terminal.

[0117] As Figure 7 shown, an 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,

[0118] The memory 113 is used for storing a computer program.

[0119] 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 preceding method embodiments, comprising:

[0120] When receiving the equalization test instruction, the tool acquisition module is connected to the second battery management module;

[0121] The equalization resistance in the to-be-tested acquisition device is used to perform voltage division equalization on the analog battery cell module;

[0122] The tool acquisition module is used to collect a first voltage signal of the analog battery cell module after being equalized;

[0123] Based on the first voltage signal, an equalization test result of the tool acquisition module is obtained.

[0124] Those skilled in the art can understand that all or part of the processes in the method for implementing the above embodiments 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 embodiments.

[0125] Therefore, an 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 preceding method embodiments, comprising:

[0126] When receiving the equalization test instruction, the tool acquisition module is connected to the second battery management module;

[0127] The equalization resistance in the to-be-tested acquisition device is used to perform voltage division equalization on the analog battery cell module;

[0128] The tool acquisition module is used to collect a first voltage signal of the analog battery cell module after being equalized;

[0129] Based on the first voltage signal, an equalization test result of the tool acquisition module is obtained.

[0130] The storage medium is a physical, non-transient storage medium, for example, can be a U disk, a mobile hard disk, a read-only memory (ROM), a magnetic disk or an optical disk, and various physical storage media that can store program codes. The computer readable storage medium can be non-volatile or volatile.

[0131] Those skilled in the art can appreciate that the units and algorithm steps of the examples 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 general terms. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person 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.

[0132] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be realized by other ways. For example, the apparatus embodiments described above are only schematic. For example, the division of each unit is only a logical function 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 ignored or not executed.

[0133] The steps in the method embodiments of the present application can be adjusted, combined and reduced in sequence according to actual needs. The units in the apparatus embodiments of the present application can be combined, divided and reduced 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.

[0134] 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 the part that contributes 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, including a plurality of instructions to make a computer device (which can be a personal computer, a terminal or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.

[0135] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0136] Obviously, various modifications and changes can be made to the present application without departing from the spirit and scope thereof. Accordingly, it is intended that all such modifications and changes be included within the scope of the application as expressed in the following claims and their equivalents.

[0137] The above description is only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements should be included 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 equalization test system, characterized by, 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 both 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 can be 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 an 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; When receiving a 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 both 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; 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; The battery equalization test system further comprises a first power module and a second power module; When receiving an 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 a 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; The tool acquisition module comprises an equalization test acquisition board and a cascade acquisition board; when receiving an equalization test instruction, the control module controls the equalization test acquisition board in the tool acquisition module to be connected to the second battery management module, the equalization test acquisition board acquires a first voltage signal of the analog battery cell module and sends the first voltage signal to the control module for analysis through the second battery management module; 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 collection instruction, the control module controls the tool collection module to be connected to the to-be-tested collector, the tool collection module and the to-be-tested collector are respectively configured to collect the second voltage signals of the resistors on the analog battery cell module, and the voltage signals collected by the tool collection module are sent to the first battery management module through the to-be-tested collector, 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.

2. A battery equalization test method, characterized by, The control module is applied to the battery equalization test system of claim 1, and the battery equalization test method comprises: When receiving the equalization test instruction, the control module controls the tool collection module to be connected to the second battery management module; The analog battery cell module is divided and equalized by using the equalization resistor in the to-be-tested collector; The first voltage signals of the analog battery cell module after being equalized are collected by using the tool collection module; Based on the first voltage signals, the equalization test result of the tool collection module is obtained.

3. The method of claim 2, wherein, The first voltage signals comprise equalization voltage values of the equalization resistors and non-equalization voltage values of the non-equalization resistors, and based on the voltage signals, the equalization test result of the tool collection module is obtained, which comprises: If the ratio of the equalization voltage values to the non-equalization voltage values is equal to the preset proportion coefficient, the obtained equalization test result is normal; If the ratio of the equalization voltage values to the non-equalization voltage values is not equal to the preset proportion coefficient, the obtained equalization test result is abnormal.

4. The method of claim 2, wherein, The method further comprises: When receiving the data collection instruction, the control module controls the tool collection module to be connected to the to-be-tested collector; The tool collection module and the to-be-tested collector respectively collect the second voltage signals of the resistors on the analog battery cell module; Based on the second voltage signals, the data collection test result of the to-be-tested collector is obtained.

5. A battery equalization testing device, characterized by, The computer device comprises a memory and a processor, the memory stores a computer program, and the processor executes the computer program to realize the method of any one of claims 2-4.

6. A computer device, comprising: The computer device comprises a memory and a processor, the memory stores a computer program, and the processor executes the computer program to realize the method of any one of claims 2-4.

7. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, and the computer program can realize the method of any one of claims 2-4 when executed by the processor.

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