Aging qualification judgment method and device of battery module and storage medium

Abstract

The invention relates to the technical field of energy storage, in particular to an aging qualification judgment method and device of a battery module and a storage medium. The method comprises the following steps: controlling to carry out an aging test on a battery module; acquiring a plurality of electrical parameters of the battery module during the aging test, wherein the plurality of electrical parameters comprise charge / discharge capacity, charge / discharge temperature rise, charge / discharge temperature difference, predicted charge / discharge time, charge / discharge voltage difference, charge / discharge efficiency and charge / discharge internal resistance; respectively obtaining weights corresponding to the plurality of electrical parameters; whether the electrical parameters reach a preset threshold value or not is judged, if yes, 1 is assigned to the electrical parameters, and if not, 0 is assigned to the electrical parameters; judging whether the battery module passes the aging test or not; and if yes, judging that the aging of the battery module is qualified, so that the battery module passing the aging test is affirmed to be qualified in aging, and the qualified aging battery module is reliable in quality and stable in performance, so that the operation efficiency and the safety of electronic equipment applying the battery module can be ensured.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage, and particularly to a method, device, and storage medium for determining the aging qualification of a battery module. Background Art

[0002] As an important part of modern electronic devices, the performance and quality of battery modules are directly related to the operating efficiency and safety of electronic devices. In order to ensure that battery modules can work stably and reliably in actual applications, quality inspection before leaving the factory is particularly important.

[0003] During the manufacturing process of battery modules, due to the influence of various factors such as production process, material selection, and assembly accuracy, there may be certain initial performance differences or potential defects inside. These differences and defects may not be obvious when the battery module is just produced, but will gradually emerge during long-term use, resulting in a decline in the performance of the battery module, a shortening of its lifespan, and even safety problems. When battery modules with unstable performance or potential defects flow into the market, it will have an adverse impact on the use of users' electronic devices. Therefore, it is urgent to conduct aging tests on battery modules to ensure one of the important measures for their reliable quality and stable performance. Summary of the Invention

[0004] In view of the above problems, the present application provides a method, device, and storage medium for determining the aging qualification of a battery module, which overcomes the above problems or at least partially solves the technical problem of the need to conduct aging tests on battery modules.

[0005] According to one aspect of the present application, a method for determining the aging qualification of a battery module is provided. The method includes controlling the aging test of the battery module; obtaining a plurality of electrical parameters of the battery module during the aging test, where the plurality of electrical parameters include charge / discharge capacity, charge / discharge temperature rise, charge / discharge temperature difference, predicted charge / discharge time, charge / discharge voltage difference, charge / discharge efficiency, and charge / discharge internal resistance; respectively obtaining the weights corresponding to the plurality of electrical parameters; respectively determining whether the plurality of electrical parameters reach a preset threshold. If so, assign a value of 1 to the electrical parameter, and if not, assign a value of 0 to the electrical parameter; determine whether the battery module passes the aging test according to the assignment and the weights; if so, determine that the battery module is aging qualified.

[0006] In an optional manner, the weight of the charge / discharge capacity is 40%, the weight of the charge / discharge temperature rise is 10%, the weight of the charge / discharge temperature difference is 10%, the weight of the predicted charge / discharge time is 10%, the weight of the charge / discharge voltage difference is 10%, the weight of the charge / discharge efficiency is 10%, and the weight of the charge / discharge internal resistance is 10%.

[0007] In an alternative manner, the step of determining whether the battery module passes the aging test according to the assignment and the weight includes: calculating an aging charge score and an aging discharge score of the battery module according to the assignment and the weight; determining whether the aging charge score is greater than a preset value, and determining whether the aging discharge score is greater than the preset value; if the aging charge score is greater than the preset value and the aging discharge score is greater than the preset value, it is determined that the battery module passes the aging test.

[0008] In an alternative manner, the step of respectively obtaining the weights corresponding to the plurality of electrical parameters includes: obtaining the type and usage scenario of the battery module; adjusting the preset weights for the plurality of electrical parameters according to the type and usage scenario of the battery module to obtain the weights corresponding to the plurality of electrical parameters.

[0009] In an alternative manner, the step of respectively obtaining the weights corresponding to the plurality of electrical parameters includes: obtaining the input weights input by the user for the plurality of electrical parameters to obtain the weights corresponding to the plurality of electrical parameters.

[0010] In an alternative manner, the method is applied to an aging tooling device, and the aging tooling device is connected to the battery module. Before the step of controlling the aging test of the battery module, the method further includes: determining whether the connection between the aging tooling device and the battery module is correct; if so, obtaining the status information of the battery module; determining whether the battery module is operating normally according to the status information; if so, executing the step of controlling the aging test of the battery module.

[0011] In an alternative manner, the step of controlling the aging test of the battery module includes: controlling the execution of an aging program on the battery module; monitoring in real time the plurality of electrical parameters of the battery module; respectively determining whether the plurality of electrical parameters reach a protection threshold; if one of the electrical parameters reaches the protection threshold, stopping the aging program, otherwise controlling to continue executing the aging program on the battery module to implement the aging test.

[0012] In an alternative manner, the aging tooling device is provided with a charging port. After the step of monitoring in real time the plurality of electrical parameters of the battery module, the method further includes: determining whether the battery module is over-discharged according to the plurality of electrical parameters; if so, charging the battery module through the charging port.

[0013] In an alternative manner, the method is applied to an aging tooling device which is connected to the battery module. The aging tooling device is provided with a display screen. The method further includes: graphically displaying, through the display screen, a plurality of the electrical parameters of the battery module and the result of determining whether the battery module passes the aging test.

[0014] In an alternative manner, the method is applied to an aging tooling device which is connected to the battery module. The aging tooling device is further connected to a host computer. The method further includes: sending the plurality of the electrical parameters of the battery module to the host computer, so that a user can control the aging test of the battery module according to the plurality of the electrical parameters.

[0015] According to one aspect of the present application, there is provided an aging qualification determination device for a battery module. The device includes: a control module for controlling the aging test of the battery module; an acquisition module for acquiring a plurality of electrical parameters of the battery module during the aging test, the plurality of electrical parameters including charge / discharge capacity, charge / discharge temperature rise, charge / discharge temperature difference, estimated charge / discharge time, charge / discharge voltage difference, charge / discharge efficiency, and charge / discharge internal resistance; a weight module for respectively acquiring the weights corresponding to the plurality of electrical parameters; an assignment module for respectively determining whether the plurality of electrical parameters reach a preset threshold. If so, the electrical parameter is assigned 1. If not, the electrical parameter is assigned 0; a judgment module for judging whether the battery module passes the aging test according to the assignment and the weights. If so, it enters the determination module; a determination module for determining that the battery module is qualified for aging.

[0016] According to one aspect of an embodiment of the present application, there is provided an aging tooling device, which includes: at least one processor, and a memory. The memory is communicatively connected to the at least one processor. The memory stores instructions executable by the at least one processor. The instructions are executed by the at least one processor so that the at least one processor can execute the method as described above.

[0017] According to one aspect of an embodiment of the present application, there is provided a computer-readable storage medium which stores a computer program. When the computer program is executed by a processor, the processor executes the steps of the above method.

[0018] The beneficial effects of the present application include: By performing the aging test and qualification determination of the battery module, battery modules meeting the aging standards can be screened out; the modules passing the test are of reliable quality and stable performance, and can meet the operating efficiency and safety requirements of electronic devices, and thus are allowed to be shipped. Description of the Drawings

[0019] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, and the drawings in the figures do not constitute a scale limitation.

[0020] Figure 1 is a schematic diagram of an application system provided by an embodiment of the present application;

[0021] Figure 2 is a schematic diagram of an implementation manner of an aging tooling device provided by an embodiment of the present application;

[0022] Figure 3 is a schematic diagram of the hardware structure of a controller provided by an embodiment of the present application;

[0023] Figure 4 is a schematic diagram of the flow of a method for determining the aging qualification of a battery module provided by an embodiment of the present application;

[0024] Figure 5 is a schematic diagram of the flow of obtaining the weights corresponding to multiple electrical parameters provided by an embodiment of the present application;

[0025] Figure 6 is a schematic diagram of the flow of determining whether a battery module passes an aging test provided by an embodiment of the present application;

[0026] Figure 7 is a schematic diagram of the flow of another method for determining the aging qualification of a battery module provided by an embodiment of the present application;

[0027] Figure 8 is a schematic diagram of the flow of a method for controlling the aging test of a battery module provided by an embodiment of the present application;

[0028] Figure 9 is a schematic diagram of the flow of another method for controlling the aging test of a battery module provided by an embodiment of the present application;

[0029] Figure 10 is a schematic diagram of an aging qualification determination device for a battery module provided by an embodiment of the present application. Detailed implementation manners

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field belong to the scope of protection of this application.

[0031] In addition, the technical features involved in the embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0032] In order to facilitate readers to understand the inventive concept of this application, the application system of the embodiment of this application is now described. Figure 1 The old chemical equipment 100 is connected to the battery module 200, the host computer 400 and the charging / discharging equipment 300.

[0033] The battery module 200 is a battery module to be determined whether it is aging qualified. A data sampling line is provided in the battery module, which can sample data such as the voltage and temperature of the battery cells in the battery module.

[0034] After the battery module samples the data such as the voltage and temperature of the battery cell through the data sampling line, the sampled data is transmitted to the aging equipment.

[0035] In some embodiments, the battery module has a balancing function, that is, during the charging / discharging process of the battery module (especially at the end of charging / discharging), when the voltage difference between the battery cells in the battery module is high, the battery cells are controlled to perform small current balancing charging / discharging, thereby improving the voltage consistency between the battery cells.

[0036] In some embodiments, the battery module has a heating function, for example, the battery module has a built-in heating film or a heater, so that the battery module can be heated in a low temperature environment to ensure that the battery cell operates under suitable temperature conditions.

[0037] In some embodiments, the battery module has a built-in heat dissipation device, such as a fan, so that when the battery module is overheated, it can assist in heat dissipation and improve the operating stability of the battery module.

[0038] The charging / discharging device 300 is connected to the old chemical charging device 100 via the input and output terminals P+P-, and the charging / discharging device 300 is used to charge / discharge the battery module 200 via the old chemical charging device 100.

[0039] In some embodiments, the charge / discharge device may be an aging cabinet, which accelerates the aging process of the battery module by simulating environmental conditions such as high temperature and high humidity to evaluate its performance and lifespan during long-term use.

[0040] In some embodiments, the charge / discharge device 300 may be a bidirectional power source. The bidirectional power source is generally a power supply system with two independent energy inputs and can provide power from two different energy directions. That is, the bidirectional power source means that the power supply system has the ability to receive energy from two independent energy input terminals and can supply power to the device. Such a system can supply power from two directions simultaneously or alternately, improving the reliability and flexibility of power supply.

[0041] In some embodiments, the charge / discharge device 300 can also display data information such as the total voltage, total current, and charge / discharge capacity of the battery module.

[0042] For the above-mentioned host computer, the host computer is used to interact with the aging tooling device 100 to expand the functions of the aging tooling device.

[0043] In some embodiments, the host computer can display the relevant data of the battery module 200 in real time, such as the total voltage, charge / discharge current, charge / discharge capacity, and battery module temperature.

[0044] In some embodiments, the host computer can store the data recorded by the battery module and the aging tooling device, including the cell data, battery state information, historical fault protection, aging result diagnosis data, and aging reference results in the aging test, and save them as files in real time, which is convenient for subsequent technicians to trace, maintain, and analyze.

[0045] In some embodiments, through the setting of the host computer, it is also convenient for the user to remotely start, pause, or terminate the aging test through the host computer via the Internet, improving the operation flexibility.

[0046] For the above-mentioned aging tooling device, the aging tooling device is used to execute the aging qualification determination method and the aging qualification determination device of the battery module of the present application.

[0047] In some embodiments, please refer to Figure 2, the aging tooling device is provided with a circuit protection board, an AC (Alternating Current) input port, an AC output port, a battery module communication port 1, a host computer communication port 2, input and output terminals B + B-, and input and output ports P + P-. Among them, the AC input port, the AC output port, the battery module communication port 1, the host computer communication port 2, the input and output terminals B + B-, and the input and output ports P + P- are all connected to the circuit protection board. The AC input port is used to connect to the mains power, and the AC output port is used to connect to the battery module, so that when the battery module is over-discharged, the battery module can be charged. The battery module communication port 1 is used to interact with the battery module. The host computer communication port 2 is used to communicate with the host computer. The input and output terminals B + B- are used to connect and energize the battery module. The input and output ports P + P- are used to connect and energize the charging / discharging device.

[0048] It should be noted that, in some embodiments, the aging tooling device may also be provided with a relay charging / discharging control circuit to control the on / off of charging / discharging.

[0049] In some embodiments, the aging tooling device may also be provided with a display screen to display relevant data involved in the aging qualification determination method for the battery module.

[0050] In some embodiments, the aging tooling device may also be provided with a buzzer to give a prompt when the protection mechanism of the battery module is triggered. Among them, the triggering conditions of the protection mechanism of the battery module will be described later.

[0051] It should be noted that the aging tooling device is also provided with a controller, and the controller can execute the aging qualification determination method of the battery module. Please refer to Figure 3 , Figure 3 Specifically shows the hardware structure diagram of the controller 11 provided in the embodiment of the present application. The controller 11 includes:

[0052] At least one processor 111 and a memory 112 connected by communication ( Figure 2 Taking the connection by bus and one processor as an example). Those of ordinary skill in the art can understand that Figure 2 The structure shown is only for illustration and does not limit the structure of the above-mentioned controller 11. For example, the controller 11 may also include more or fewer components than those shown in Figure 2 , or have a different configuration from that shown in Figure 2 .

[0053] Among them, the processor 111 is used to provide computing and control capabilities, control the controller 11 to execute any method provided in the following embodiments of the application, and then perform corresponding management on the battery cell 10.

[0054] It can be understood that the processor 111 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0055] The memory 112, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the program instructions / modules corresponding to the various calculation methods in the embodiments of the present application. By running the non-transitory software programs, instructions, and modules stored in the memory 112, the processor 111 can implement the various calculation methods in any of the following method embodiments. The memory 112 can include high-speed random access memory, and can also include non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory 112 can also include a memory remotely disposed relative to the processor, and these remote memories can be connected to the processor through a network. Examples of the above networks include, but are not limited to, the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0056] The embodiments of the present application also provide a non-volatile computer-readable storage medium, and the non-volatile computer-readable storage medium stores computer-executable instructions, and these computer-executable instructions are executed by the aging tooling device to implement the various calculation methods in any of the following method embodiments.

[0057] The embodiments of the present application provide a computer program product, including a calculation program stored on a non-volatile computer-readable storage medium. The computer program includes program instructions, and when the program instructions are executed by a computer, the computer is caused to execute the various calculation methods in any of the following method embodiments.

[0058] Through the description of the above embodiments, those of ordinary skill in the art can clearly understand that each embodiment can be implemented by means of software plus a general hardware platform, and of course, it can also be implemented by hardware. Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above methods. Among them, the storage medium can be a magnetic disk, an optical disc, a read-only memory (ROM), or a random access memory (RAM), etc.

[0059] Embodiment 1

[0060] Hereinafter, a method for determining the qualification of the aging of the battery module provided by the embodiments of the present application will be discussed. Please refer to Figure 4 , Figure 4 which is a schematic flowchart of the method for determining the qualification of the aging of the battery module provided by the embodiments of the present application. The method includes the following steps:

[0061] Step S1, control the aging test of the battery module.

[0062] The aging test includes an aging charge test and an aging discharge test to evaluate the performance of the battery module during the aging charge test and to evaluate the performance of the battery module during the aging discharge test.

[0063] It should be noted that the aging charge test or the aging discharge test of the battery module can be carried out at room temperature, or the conditions of high temperature and high humidity can be simulated, and the aging test of the battery module can be carried out under the conditions of high temperature and high humidity.

[0064] Step S2, obtain a plurality of electrical parameters of the battery module during the aging test. The plurality of electrical parameters include charge / discharge capacity, charge / discharge temperature rise, charge / discharge temperature difference, estimated charge / discharge time, charge / discharge voltage difference, charge / discharge efficiency, and charge / discharge internal resistance.

[0065] The plurality of electrical parameters generated by the battery module during the aging charge test include charge capacity, charge temperature rise, charge temperature difference, estimated charge time, charge voltage difference, charge efficiency, and charge internal resistance.

[0066] The plurality of electrical parameters generated by the battery module during the aging discharge test include discharge capacity, discharge temperature rise, discharge temperature difference, estimated discharge time, discharge voltage difference, discharge efficiency, and discharge internal resistance.

[0067] Among them, a data sampling line is provided inside the battery module, which can sample data such as the voltage and temperature of the battery cells inside the battery module.

[0068] The charge / discharge capacity refers to the electrical energy that the battery module can store or release during the charge / discharge cycle, usually measured in mAh. The method for obtaining the charge / discharge capacity is to use the data sampling line to record the current and time experienced by the battery module from full discharge to full charge or from full charge to full discharge, and then calculate it through the ampere-hour method.

[0069] The charge / discharge temperature rise refers to the increase in temperature of the battery module during the charge / discharge process. The acquisition method is to use the data sampling line to track the change in the temperature of the battery cells and determine it by comparing the temperature difference before and after discharge or charge.

[0070] The charge / discharge temperature difference refers to the temperature difference between different battery cells during the charge / discharge process of the battery module. The acquisition method of the charge / discharge temperature difference is to continuously monitor the temperature of each battery cell through the data sampling line and calculate the maximum temperature difference between them.

[0071] The estimated charge / discharge time refers to the estimated time required for the battery module to go from a fully charged state to a fully discharged state or vice versa. The method for obtaining the estimated charge / discharge time can be to estimate by calculation based on the total capacity and charge / discharge current of the battery module.

[0072] In some embodiments, the battery module is configured with a charge / discharge strategy at the time of factory. The charge / discharge strategy sets different charging stages, and each charging stage corresponds to a charging duration and a maximum allowable charging current. Thus, the estimated charge / discharge time of the battery module can also be obtained by accumulating the charging durations of each charging stage.

[0073] The charge / discharge voltage difference reflects the consistency among the battery cells in the battery module. During the charge / discharge process of the battery cells, by recording the voltages of each battery cell in real time and comparing the voltages of each battery cell at the same time point or in the same charge / discharge state, the charge / discharge voltage difference can be calculated.

[0074] The charge / discharge efficiency refers to the ratio of the actually output or absorbed capacity to the theoretically input or output capacity during the charge / discharge process of the battery module. The actually output or absorbed capacity during the charge / discharge process of the battery module is the above-mentioned charge / discharge capacity. After obtaining the charge / discharge capacity, the charge / discharge efficiency can be further calculated.

[0075] The charge / discharge internal resistance refers to the magnitude of the internal resistance of the battery module during the charge / discharge process. The acquisition method of the charge / discharge internal resistance is to measure the voltage and current of the battery module in different charge / discharge states through the data sampling line and calculate using Ohm's law.

[0076] It should be noted that when the aging tooling device is connected to the host computer, after step S2, that is, the step of obtaining multiple electrical parameters of the battery module during the aging test, the method further includes: sending the multiple electrical parameters of the battery module to the host computer, so that the user can control the aging test of the battery module according to the multiple electrical parameters, thereby improving the convenience of the operation for determining the qualification of the battery module aging.

[0077] Step S3: respectively obtain the weights corresponding to the multiple electrical parameters.

[0078] The multiple electrical parameters include charge / discharge capacity, charge / discharge temperature rise, charge / discharge temperature difference, expected charge / discharge time, charge / discharge voltage difference, charge / discharge efficiency, and charge / discharge internal resistance. Then, respectively obtaining the weights corresponding to the multiple electrical parameters means respectively obtaining the weights of charge capacity, charge temperature rise, charge temperature difference, expected charge time, charge voltage difference, charge efficiency, charge internal resistance, discharge capacity, discharge temperature rise, discharge temperature difference, expected discharge time, discharge voltage difference, discharge efficiency, and discharge internal resistance.

[0079] It should be noted that the sum of the weights of the charge capacity, charge temperature rise, charge temperature difference, expected charge time, charge voltage difference, charge efficiency, and charge internal resistance is 1.

[0080] It should be noted that the sum of the weights of the discharge capacity, discharge temperature rise, discharge temperature difference, expected discharge time, discharge voltage difference, discharge efficiency, and discharge internal resistance is 1.

[0081] The weights corresponding to the multiple electrical parameters can be preset. For example, the weight of the charge / discharge capacity is 40%, the weight of the charge / discharge temperature rise is 10%, the weight of the charge / discharge temperature difference is 10%, the weight of the expected charge / discharge time is 10%, the weight of the charge / discharge voltage difference is 10%, the weight of the charge / discharge efficiency is 10%, and the weight of the charge / discharge internal resistance is 10%.

[0082] Among them, the charge / discharge capacity directly reflects the energy storage ability of the battery module and is one of the most fundamental and important indicators for measuring the performance of the battery module. A high charge / discharge capacity means longer usage time and greater energy reserve, which is particularly important in fields such as electric vehicles and portable electronic devices. Given its core position, a relatively high weight is assigned to the charge / discharge capacity (for example, 40%), emphasizing its leading role in the comprehensive evaluation. Also, the purpose of the battery module aging test is mainly to see whether the charge / discharge capacity of the battery module meets the standards and can meet the corresponding indicators of the product and the usage needs of users.

[0083] Among them, the weights of the charging temperature rise and the discharging temperature rise can be assigned 10%. The heat generated during the charge / discharge process will cause the temperature of the battery module to rise. Excessive temperature may cause the internal chemical reaction of the battery module to intensify, resulting in a decline in the performance of the battery module, and even leading to thermal runaway, posing a safety hazard. High temperature will affect the charge / discharge efficiency and cycle life of the battery module. Continuous high-temperature operation will accelerate the aging of the battery module materials and shorten the service life of the battery module. Considering the safety and performance of the battery module, certain weights are respectively assigned to the charging temperature rise and the discharging temperature rise (for example, 10%).

[0084] Among them, the weights of the charging temperature difference and the discharging temperature difference can be assigned 10%. The temperature difference affects the working state and aging speed of the battery module. Excessive temperature difference may lead to local overheating, accelerating material degradation, and even causing safety accidents. Good temperature management helps to maintain the optimal performance of the battery module. To ensure the safe operation of the battery module, certain weights are respectively assigned to the charging temperature difference and the discharging temperature difference (for example, 10%).

[0085] Among them, the weights of the estimated charging time and the discharging time can be assigned 10%. The estimated charge / discharge time affects the user's usage convenience and waiting time. A longer estimated charging time will reduce the user's satisfaction. At the same time, the fast charge / discharge ability is a very important performance indicator, which directly affects the market competitiveness of the product. A certain weight is assigned to the estimated charging time (for example, 10%).

[0086] Among them, the weights of the charging voltage difference and the discharging voltage difference can be assigned 10%. The voltage difference reflects the consistency between each unit inside the battery module. Excessive voltage difference will cause some battery cells to fail prematurely, affecting the performance and safety of the entire battery module group. Especially in the scenario of multi-cell series use, voltage difference control is particularly important. Considering its potential impact on the reliability and safety of the battery module, certain weights are respectively given to the charging voltage difference and the discharging voltage difference (for example, 10%).

[0087] Among them, the weight of the charge / discharge efficiency is assigned 10%. The charge / discharge efficiency determines the effectiveness of energy conversion during the charging and discharging processes of the battery module, directly affecting the actual available capacity and service life of the battery module. An efficient charge / discharge process can not only reduce energy waste but also extend the service life of the battery module. Given its significant long-term impact, relatively high weights (e.g., 10%) are assigned to the charging efficiency and the discharging efficiency respectively.

[0088] Among them, the weight of the charge / discharge internal resistance can be assigned 10%. The charge / discharge internal resistance directly affects the energy loss during the charge / discharge process. The greater the internal resistance, the more energy is lost during the charge / discharge process, and the lower the charge / discharge efficiency. It also affects the voltage characteristics and temperature influence of the battery module. Certain weights (e.g., 10%) are assigned to the charging internal resistance and the discharging internal resistance respectively.

[0089] It should be noted that the weights corresponding to multiple said electrical parameters can be preset or obtained after being adjusted according to the type and usage scenario of the battery module. For example, please refer to Figure 5 , step S3, that is, the step of respectively obtaining the weights corresponding to multiple said electrical parameters, includes:

[0090] Step S31, obtain the type and usage scenario of the battery module.

[0091] Step S32, according to the type and usage scenario of the battery module, adjust the preset weights for multiple said electrical parameters to obtain the weights corresponding to multiple said electrical parameters.

[0092] The type of the battery module refers to the characteristics such as the structure, composition, and usage of the battery module. For example, a lithium-ion battery module, a sodium-ion battery module, a solid-state battery module, etc. Different types of battery modules have different performance characteristics, and the weights of multiple said electrical parameters of different types of battery modules can be adjusted accordingly.

[0093] Among them, the usage scenario of the battery module refers to the specific environment and conditions in which the battery module is applied. For example, electric vehicles, energy storage systems, mobile devices, aerospace, etc. Different usage scenarios have different performance requirements for the battery module, and when evaluating the performance of the battery module, the weights corresponding to multiple said electrical parameters of the battery module used are also different.

[0094] For example, electric vehicles require the battery module to have a high energy density and a long service life, so the weight of the charge / discharge capacity can be adjusted higher, for example, 50%.

[0095] Also, for mobile devices, more attention is paid to the portability and fast charging ability of the battery module, so the weight of the estimated charge / discharge duration can be adjusted higher, for example, 15%.

[0096] It should be noted that the weights corresponding to the multiple electrical parameters can be preset, can also be obtained after being adjusted according to the type and usage scenario of the battery module, or can be manually input by the user. Then, step S3, that is, the step of separately obtaining the weights corresponding to the multiple electrical parameters, includes: obtaining the input weights of the user regarding the multiple electrical parameters to obtain the weights corresponding to the multiple electrical parameters.

[0097] The input weights of the user regarding the multiple electrical parameters can be input by the user through the display screen of the aging tooling device or can be input by the user at the upper computer end.

[0098] Step S4, separately determine whether the multiple electrical parameters reach a preset threshold. If so, assign a value of 1 to the electrical parameter; if not, assign a value of 0 to the electrical parameter.

[0099] For one electrical parameter, only one preset threshold can be set; or, for one electrical parameter, multiple preset thresholds can also be set, so that the applicable preset threshold can be selected according to the type and usage scenario of the battery module.

[0100] Step S5, according to the assignment and the weight, determine whether the battery module passes the aging test. If so, execute step S6; otherwise, determine that the battery module fails the aging test.

[0101] In some embodiments, please refer to Figure 6 , step S5, that is, the step of determining whether the battery module passes the aging test according to the assignment and the weight, includes:

[0102] Step S51, according to the assignment and the weight, calculate the aging charge score and the aging discharge score of the battery module.

[0103] Specifically, in the aging charge test, sum up the products of the assignments of the respective electrical parameters and their corresponding weights, and then divide by 100% to obtain the aging charge score.

[0104] Similarly, in the aging discharge test, sum up the products of the assignments of the respective electrical parameters and their corresponding weights, and then divide by 100% to obtain the aging discharge score.

[0105] For example, the weight of the charge / discharge capacity is 40%, the weight of the charge / discharge temperature rise is 10%, the weight of the charge / discharge temperature difference is 10%, the weight of the estimated charge / discharge time is 10%, the weight of the charge / discharge voltage difference is 10%, the weight of the charge / discharge efficiency is 10%, the weight of the charge / discharge internal resistance is 10%, the assignment value of the charge capacity is 1, the assignment value of the charge temperature rise is 1, the assignment value of the charge temperature difference is 0, the assignment value of the estimated charge time is 1, the assignment value of the charge voltage difference is 1, the assignment value of the charge efficiency is 1, the assignment value of the charge internal resistance is 1, the assignment value of the charge capacity is 1, the assignment value of the charge temperature rise is 1, the assignment value of the charge temperature difference is 0, the assignment value of the estimated charge time is 1, the assignment value of the charge voltage difference is 1, the assignment value of the charge efficiency is 1, the assignment value of the charge internal resistance is 1, then the aging charge score is equal to (1×40% + 1×10% + 0×10% + 1×10% + 1×10% + 1×10% + 1×10%) / % = 90; similarly, the aging discharge score is equal to (1×40% + 1×10% + 0×10% + 1×10% + 1×10% + 1×10% + 1×10%) / % = 90.

[0106] Step S52, determine whether the aging charge score is greater than a preset value, and determine whether the aging discharge score is greater than the preset value. If the aging charge score is greater than the preset value and the aging discharge score is greater than the preset value, then execute step S53.

[0107] Continuing with the above example, for instance, the preset value is 80 points. Since the aging charge score (90 points) is greater than the preset value (80 points) and the aging discharge score (90 points) is greater than the preset value (80 points), it is determined that the battery module passes the aging test.

[0108] Step S53, determine that the battery module passes the aging test.

[0109] Step S6, determine that the battery module is qualified in aging.

[0110] In some embodiments, after determining that the battery module is qualified in aging, the aging tooling device can output qualified information; similarly, when determining that the battery module is unqualified in aging, the aging tooling device can also output unqualified information.

[0111] When the aging tooling device is provided with a display screen, the above-mentioned qualified or unqualified information can be output through the display screen.

[0112] When the aging tooling device is provided with a display screen, the multiple electrical parameters of the battery module and the result of determining whether the battery module passes the aging test are graphically displayed through the display screen, that is, the qualified or unqualified information is graphically displayed through the display screen, so as to facilitate the user to check.

[0113] It should be noted that the aging tooling device can also output a report on the battery module. The report includes but is not limited to multiple electrical parameters, qualified or unqualified information, abnormal situation records, etc., to facilitate the user to file and follow-up processing.

[0114] In the embodiment of the present application, the method for determining the aging qualification of a battery module includes controlling the aging test of the battery module; obtaining multiple electrical parameters of the battery module during the aging test, and the multiple electrical parameters include charge / discharge capacity, charge / discharge temperature rise, charge / discharge temperature difference, estimated charge / discharge time, charge / discharge voltage difference, charge / discharge efficiency, and charge / discharge internal resistance; respectively obtaining the weights corresponding to the multiple electrical parameters; respectively determining whether the multiple electrical parameters reach a preset threshold. If so, assign a value of 1 to the electrical parameter, and if not, assign a value of 0 to the electrical parameter; judge whether the battery module passes the aging test according to the assignment and the weight; if so, determine that the battery module is aging qualified. Using this method, by aging the battery module, the battery modules that meet the aging standards can be screened out; the modules that pass the test are of reliable quality and stable performance, and can meet the operating efficiency and safety requirements of electronic devices, so as to be approved for shipment.

[0115] Embodiment 2

[0116] Next, another method for determining the aging qualification of a battery module provided in the embodiment of the present application will be discussed. Please refer to Figure 7 , Figure 7 is a schematic flow chart of another method for determining the aging qualification of a battery module provided in the embodiment of the present application. The difference between this method and the method described in Embodiment 1 is that before the step S1, that is, the step of controlling the aging test of the battery module, the method further includes:

[0117] Step A1, judge whether the wiring between the aging tooling device and the battery module is correct. If so, enter step A2.

[0118] Among them, in some embodiments, when the aging tooling device detects that there is no communication signal from the battery module, it is determined that the wiring is incorrect.

[0119] Step A2, obtain the status information of the battery module.

[0120] The state information may be information on whether charging / discharging is allowed. When the state information indicates that charging / discharging is allowed, it is determined that the battery module is operating normally, and the aging test of the battery module can be controlled.

[0121] Step A3: According to the state information, determine whether the battery module is operating normally. If so, execute Step S1, that is, control the aging test of the battery module.

[0122] It should be noted that in some embodiments, the aging tooling device is also configured with a protection mechanism. That is, when controlling the aging test of the battery module, the protection mechanism can be started. Specifically, please refer to Figure 8 , Step S1, that is, the step of controlling the aging test of the battery module, includes:

[0123] Step S11: Control the execution of the aging program on the battery module.

[0124] Among them, the aging program includes the above-mentioned aging charge test and aging discharge test.

[0125] Step S12: Real-time monitor multiple electrical parameters of the battery module.

[0126] The specific acquisition method of multiple electrical parameters can refer to the above embodiments and will not be elaborated here.

[0127] Step S13: Determine whether each of the multiple electrical parameters reaches the protection threshold. If one of the electrical parameters reaches the protection threshold, execute Step S14; otherwise, execute Step S15.

[0128] By setting the protection threshold, the safety state of the battery module during the aging test can be protected, and overcurrent protection for charging, overcurrent protection for discharging, overvoltage protection for the total charging / discharging voltage, undervoltage protection for the total charging / discharging voltage, overvoltage protection for single-cell charging / discharging, undervoltage protection for single-cell charging / discharging, and over-temperature protection for the battery module can be achieved.

[0129] When one of the electrical parameters reaches the protection threshold, Step S14 can be executed, that is, stop the aging program. Otherwise, it can be considered that the safety during the execution of the aging program is good, and the aging program can continue to be executed on the battery module to complete the aging test.

[0130] Step S14: Stop the aging program.

[0131] Step S15: Control to continue executing the aging program on the battery module to complete the aging test.

[0132] It should be noted that when the aging tooling device is provided with a buzzer, a prompt can be given through the buzzer when the protection mechanism of the battery module is triggered.

[0133] Through the above steps S11, S12, S13, S14, and S15, during the process of controlling the aging test of the battery module, the operating safety of the battery module can be guaranteed, that is, on the premise of ensuring the operating safety of the battery module, the aging test of the battery module is carried out, and then the aging qualification determination of the battery module is realized.

[0134] It should be noted that in some embodiments, the aging tooling device is provided with a charging port, for example, Figure 2 the AC output port shown. After step S12, that is, after the step of continuously monitoring the multiple electrical parameters of the battery module, please refer to Figure 9 and the method further includes:

[0135] Step S16, according to the multiple electrical parameters, determine whether the battery module is over-discharged. If so, execute step S17.

[0136] There are multiple ways to determine whether the battery module is over-discharged. In some embodiments, if the discharge capacity among the multiple electrical parameters exceeds the normal range, it is determined that the battery module is over-discharged. In still some other embodiments, if the discharge internal resistance among the multiple electrical parameters exceeds the normal range, it is determined that the battery module is over-discharged.

[0137] Step S17, charge the battery module through the charging port.

[0138] Charging the battery module through the charging port can avoid the battery being scrapped due to severe over-discharge.

[0139] In the embodiments of the present application, before the control step S1, that is, before the step of controlling the aging test of the battery module, it is determined whether the wiring between the aging tooling device and the battery module is correct; if so, the status information of the battery module is obtained; according to the status information, it is determined whether the battery module is operating normally; if so, the step of controlling the aging test of the battery module is executed, so as to ensure the accuracy and safety of the aging qualification determination of the battery module.

[0140] Embodiment 3

[0141] Next, the aging qualification determination device for the battery module provided in the embodiments of the present application will be described. Please refer to Figure 10 , Figure 10It is a schematic diagram of an aging qualification determination device for a battery module provided by an embodiment of the present application. The aging qualification determination device 1 of the battery module includes a control module 11 for controlling the aging test of the battery module; an acquisition module 12 for acquiring a plurality of electrical parameters of the battery module during the aging test, and the plurality of electrical parameters include charge / discharge capacity, charge / discharge temperature rise, charge / discharge temperature difference, predicted charge / discharge time, charge / discharge voltage difference, charge / discharge efficiency, and charge / discharge internal resistance; a weight module 13 for respectively obtaining the weights corresponding to the plurality of electrical parameters; a first judgment module 14 for respectively judging whether the plurality of electrical parameters reach a preset threshold, if so, assigning 1 to the electrical parameter, if not, assigning 0 to the electrical parameter; a second judgment module 15 for judging whether the battery module passes the aging test according to the assignment and the weight, if so, entering a judgment module 16; and a judgment module 16 for judging that the battery module is qualified for aging.

[0142] In some embodiments, the weight of the charge / discharge capacity is 40%, the weight of the charge / discharge temperature rise is 10%, the weight of the charge / discharge temperature difference is 10%, the weight of the predicted charge / discharge time is 10%, the weight of the charge / discharge voltage difference is 10%, the weight of the charge / discharge efficiency is 10%, and the weight of the charge / discharge internal resistance is 10%.

[0143] In some embodiments, the second judgment module 15 includes: a calculation unit 151 for calculating an aging charge score and an aging discharge score of the battery module according to the assignment and the weight; a first judgment unit 152 for judging whether the aging charge score is greater than a preset value and judging whether the aging discharge score is greater than the preset value, if the aging charge score is greater than the preset value and the aging discharge score is greater than the preset value, then entering a first determination unit; and a first determination unit 153 for determining that the battery module passes the aging test.

[0144] In some embodiments, the weight module 13 includes: a first acquisition unit 131 for acquiring the type and usage scenario of the battery module; and an adjustment unit 132 for adjusting the preset weights of the plurality of electrical parameters according to the type and usage scenario of the battery module to obtain the weights corresponding to the plurality of electrical parameters.

[0145] In some embodiments, the weight module 13 further includes a second acquisition unit 133 for acquiring the input weights of the plurality of electrical parameters input by the user to obtain the weights corresponding to the plurality of electrical parameters.

[0146] In some embodiments, the aging qualification determination device 1 of the battery module further includes: a third determination module 17, configured to determine whether the aging tooling device is correctly wired to the battery module. If so, it proceeds to the status acquisition module 18; a status acquisition module 18, configured to acquire the status information of the battery module; a fourth determination module 19, configured to determine whether the battery module is operating normally according to the status information. If so, it proceeds to the control module 11.

[0147] In some embodiments, the control module 11 includes: a control unit 111, configured to control the execution of the aging program on the battery module; a monitoring unit 112, configured to monitor multiple electrical parameters of the battery module in real time; a second determination unit 113, configured to determine whether each of the multiple electrical parameters reaches a protection threshold. If one of the electrical parameters reaches the protection threshold, it proceeds to the stop unit 114, otherwise it proceeds to the execution unit 115; a stop unit 114, configured to stop the aging program; an execution unit 115, configured to control the continuation of the execution of the aging program on the battery module to implement the aging test.

[0148] In some embodiments, the aging tooling device is provided with a charging port, and the control module 11 further includes: a third determination unit 116, configured to determine whether the battery module is over-discharged according to the multiple electrical parameters. If so, it executes the charging unit 117; a charging unit 117, configured to charge the battery module through the charging port.

[0149] In some embodiments, the aging qualification determination device 1 of the battery module further includes: a display module 20, configured to graphically display the multiple electrical parameters of the battery module and the result of determining whether the battery module passes the aging test through the display screen.

[0150] In some embodiments, the aging qualification determination device 1 of the battery module further includes: an interaction module 21, configured to send the multiple electrical parameters of the battery module to the host computer, so that the user can control the execution of the aging test on the battery module according to the multiple electrical parameters.

[0151] In an embodiment of the present application, the aging test of the battery module is controlled by a control module 11; a plurality of electrical parameters of the battery module during the aging test are obtained by an acquisition module 12, and the plurality of electrical parameters include charge / discharge capacity, charge / discharge temperature rise, charge / discharge temperature difference, estimated charge / discharge time, charge / discharge voltage difference, charge / discharge efficiency, and charge / discharge internal resistance; weights corresponding to the plurality of electrical parameters are respectively obtained by a weight module 13; a first judgment module 14 respectively judges whether the plurality of electrical parameters reach a preset threshold, and if so, assigns 1 to the electrical parameter, and if not, assigns 0 to the electrical parameter; a second judgment module 15 judges whether the battery module passes the aging test according to the assignment and the weight, and if so, enters a judgment module 16; if the judgment module 16 determines that the battery module is qualified for aging, then by performing the aging test on the battery module, it can be tested whether the battery module is qualified for aging. Thus, the battery module that passes the aging test is recognized as being qualified for aging, and thus the battery module that is qualified for aging can be shipped. That is, the battery module that is qualified for aging has reliable quality and stable performance, thereby ensuring the operating efficiency and safety of the electronic device to which the battery module is applied.

[0152] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them; under the idea of the present application, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other changes in different aspects of the present application as described above. For the sake of brevity, they are not provided in detail; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for determining the qualification of battery module aging, characterized in that The method includes: Controlling the aging test of the battery module; Obtaining a plurality of electrical parameters of the battery module during the aging test, the plurality of electrical parameters including charge / discharge capacity, charge / discharge temperature rise, charge / discharge temperature difference, estimated charge / discharge time, charge / discharge voltage difference, charge / discharge efficiency, and charge / discharge internal resistance; Respectively obtaining the weights corresponding to the plurality of electrical parameters; Respectively determining whether the plurality of electrical parameters reach a preset threshold. If so, assigning a value of 1 to the electrical parameter; if not, assigning a value of 0 to the electrical parameter; Judging whether the battery module passes the aging test according to the assignment and the weight; If so, determining that the battery module is qualified for aging.

2. The method according to claim 1, characterized in that The weight of the charge / discharge capacity is 40%, the weight of the charge / discharge temperature rise is 10%, the weight of the charge / discharge temperature difference is 10%, the weight of the estimated charge / discharge time is 10%, the weight of the charge / discharge voltage difference is 10%, the weight of the charge / discharge efficiency is 10%, and the weight of the charge / discharge internal resistance is 10%.

3. The method according to claim 1, wherein The step of judging whether the battery module passes the aging test according to the assignment and the weight includes: Calculating the aging charge score and the aging discharge score of the battery module according to the assignment and the weight; Judging whether the aging charge score is greater than a preset value and judging whether the aging discharge score is greater than the preset value; If the aging charge score is greater than the preset value and the aging discharge score is greater than the preset value, it is determined that the battery module passes the aging test.

4. The method according to claim 1, wherein The step of respectively obtaining the weights corresponding to the plurality of electrical parameters includes: Obtaining the type and usage scenario of the battery module; Adjusting the preset weights for the plurality of electrical parameters according to the type and usage scenario of the battery module to obtain the weights corresponding to the plurality of electrical parameters.

5. The method according to claim 1, wherein The step of respectively obtaining the weights corresponding to the plurality of electrical parameters includes: obtaining the input weights input by the user for the plurality of electrical parameters to obtain the weights corresponding to the plurality of electrical parameters.

6. The method according to claim 1, wherein The method is applied to an aging tooling device, and the aging tooling device is connected to the battery module. Before the step of controlling the aging test of the battery module, the method further includes: Judging whether the wiring between the aging tooling device and the battery module is correct; If so, obtaining the status information of the battery module; Judging whether the battery module is operating normally according to the status information; If so, performing the step of controlling the aging test of the battery module.

7. The method according to claim 6, characterized in that, The step of controlling the aging test of the battery module includes: Controlling the execution of an aging program on the battery module; Real-time monitoring of the plurality of electrical parameters of the battery module; Respectively judging whether the plurality of electrical parameters reach a protection threshold; If one of the electrical parameters reaches the protection threshold, stopping the aging program; otherwise, controlling to continue executing the aging program on the battery module to implement the aging test.

8. The method according to claim 7, wherein The old industrial fixture is provided with a charging port. After the step of continuously monitoring a plurality of the electrical parameters of the battery module, the method further includes: Judging whether the battery module is over-discharged according to the plurality of electrical parameters; If so, charging the battery module through the charging port.

9. The method according to claim 1, wherein The method is applied to an old industrial fixture, the old industrial fixture is connected to the battery module, the old industrial fixture is provided with a display screen, and the method further includes: Graphically displaying, through the display screen, the plurality of electrical parameters of the battery module and the result of judging whether the battery module passes the aging test.

10. The method according to claim 1, wherein The method is applied to an old industrial fixture, the old industrial fixture is connected to the battery module, and the old industrial fixture is further connected to a host computer. The method further includes: Sending the plurality of electrical parameters of the battery module to the host computer, so that a user can control the aging test of the battery module according to the plurality of electrical parameters.

11. An aging qualification determination device for a battery module, characterized in that, The device includes: A control module, configured to control the aging test of the battery module; An acquisition module, configured to acquire a plurality of electrical parameters of the battery module during the aging test. The plurality of electrical parameters include charge / discharge capacity, charge / discharge temperature rise, charge / discharge temperature difference, estimated charge / discharge time, charge / discharge voltage difference, charge / discharge efficiency, and charge / discharge internal resistance; A weight module, configured to respectively obtain the weights corresponding to the plurality of electrical parameters; An assignment module, configured to respectively judge whether the plurality of electrical parameters reach a preset threshold. If so, assign 1 to the electrical parameter. If not, assign 0 to the electrical parameter; A judgment module, configured to judge whether the battery module passes the aging test according to the assignment and the weights. If so, enter a determination module; A determination module, configured to determine that the battery module is qualified for aging.

12. An aging tooling device, characterized in that, Includes: At least one processor; And A memory, the memory is communicatively connected to the at least one processor, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method according to any one of claims 1-10.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor executes the steps of the method according to any one of claims 1-10.

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