Battery cell heat insulation pad design method, electronic equipment and storage medium

Abstract

The embodiment of the invention discloses a battery cell heat insulation pad design method, electronic equipment and a storage medium. The method comprises the following steps: acquiring performance parameters of a target battery cell; based on the performance parameters, determining heat insulation pad size data corresponding to the target battery cell; checking the size data of the heat insulation pad to generate a corresponding checking result; and after judging that the size data of the heat insulation pad does not meet a preset requirement based on the checking result, adjusting the heat insulation pad between the target battery cells. According to the battery cell heat insulation pad design scheme provided by the invention, the error between a design value and an actual value can be reduced, and the pre-tightening force stability and the overall performance of the battery module are improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a method for designing a battery cell thermal insulation pad, an electronic device, and a storage medium. Background Art

[0002] With the development of new energy technology, the performance and reliability of battery modules as core components of electric vehicles and energy storage systems have received widespread attention. The performance of battery modules depends not only on the quality of the battery cells themselves, but also on the design of the buffer pads between the cells. The main function of the buffer pads between the cells is to provide the necessary preload to maintain close contact between the cells, prevent the cells from shifting under vibration or impact, and also play a role in heat insulation and buffering.

[0003] The traditional method of designing buffer pads between battery cells mainly determines the size of the buffer pad based on the width and height dimensions of the battery cell, and calculates the thickness of the buffer pad based on the preload stress and the stress-strain curve of the material. This method can meet the design requirements of the battery module in theory, but there are some difficult-to-overcome problems in actual production. First, due to the tolerance in the manufacturing process of components, there is an error between the actual gap value between the battery cells and the design value, which leads to a deviation between the actual compression rate of the buffer pad and the theoretical calculated value. Secondly, the battery cell will expand during the charging and discharging process, and the traditional design method fails to fully consider the impact of the battery cell expansion on the performance of the buffer pad. These problems ultimately lead to the instability of the module preload, affecting the structural strength and thermal management performance of the battery module, and reducing the reliability and safety of the battery module. It can be seen that the existing buffer pad design method has problems with large errors and low stability. Summary of the invention

[0004] The embodiments of the present application provide a battery cell thermal insulation pad design method, an electronic device, and a storage medium, which can reduce the error between the design value and the actual value and improve the preload stability and overall performance of the battery module.

[0005] The present application provides a method for designing a battery cell thermal insulation pad, including:

[0006] Obtain the performance parameters of the target battery cell;

[0007] Based on the performance parameters, determining the thermal insulation pad size data corresponding to the target battery cell;

[0008] Verifying the thermal insulation pad size data and generating corresponding verification results;

[0009] After determining that the thermal insulation pad size data does not meet the preset requirements based on the verification result, the thermal insulation pads between the target battery cells are adjusted.

[0010] Optionally, in some embodiments of the present application, obtaining the performance parameters of the target battery cell includes:

[0011] Obtaining the battery cell model of the target battery cell and its corresponding battery cell size data;

[0012] Performing a cyclic charge-discharge test on the target battery cell to obtain expansion force data and expansion rate data of the target battery cell;

[0013] Performing an extrusion test on the target battery cell to obtain a minimum preload force and a maximum preload force of the target battery cell;

[0014] Calculating a positive tolerance value and a negative tolerance value of the target battery cell;

[0015] A thermal diffusion test is performed on the target battery cell to obtain a thermal diffusion test result.

[0016] Optionally, in some embodiments of the present application, the thermal insulation pad includes an outer circular frame buffer pad and a middle thermal insulation pad, and the step of determining the thermal insulation pad size data corresponding to the target battery cell based on the performance parameter includes:

[0017] Determining the size data of the outer circular frame buffer pad based on the performance parameter and the material information of the outer circular frame buffer pad;

[0018] Based on the size data of the outer circular frame buffer pad and the performance parameters, the size data of the middle thermal insulation pad is determined.

[0019] Optionally, in some embodiments of the present application, determining the size data of the outer circular frame buffer pad based on the performance parameter and the material information of the outer circular frame buffer pad includes:

[0020] Based on the battery cell size data, determine the total width, total height and width of the circular frame of the outer circular frame buffer pad;

[0021] The thickness of the outer circular frame buffer pad is determined based on the material information of the outer circular frame buffer pad, the minimum preload force, and the maximum preload force.

[0022] Optionally, in some embodiments of the present application, determining the thickness of the outer circular frame buffer pad based on the material information of the outer circular frame buffer pad, the minimum preload force, and the maximum preload force includes:

[0023] Selecting an average value of the minimum preload force and the maximum preload force as a theoretical preload force value;

[0024] Calculating the area of ​​the outer circular frame buffer pad;

[0025] Calculating the preload stress based on the area of ​​the outer circular frame buffer pad and the theoretical preload force;

[0026] Obtaining a stress-strain curve corresponding to the material information of the outer circular frame buffer pad;

[0027] Determining a material compression rate under the prestress based on the prestress and the stress-strain curve;

[0028] The thickness of the outer circular frame buffer pad is calculated based on the material compression rate and the target interval design value between the battery cells.

[0029] Optionally, in some embodiments of the present application, determining the size data of the middle thermal insulation pad based on the size data of the outer circular frame buffer pad and the performance parameter includes:

[0030] Determine the width of the middle heat insulation pad based on the total width of the circular frame and the width of the circular frame;

[0031] Determine the height of the middle heat insulation pad based on the total height of the circular frame and the width of the circular frame;

[0032] Based on the thermal diffusion test results, the thickness of the intermediate thermal insulation pad is determined.

[0033] Optionally, in some embodiments of the present application, the verifying the thermal insulation pad size data to generate a corresponding verification result includes:

[0034] Based on the thickness of the outer circular frame buffer pad, the design value of the interval between the target chips and the negative tolerance value of the target battery cell, the minimum actual preload force of the outer circular frame buffer pad is calculated;

[0035] Based on the thickness of the outer circular frame buffer pad, the design value of the interval between the target chips and the positive tolerance value of the target battery cell, the maximum actual preload force of the outer circular frame buffer pad is calculated;

[0036] A check is performed based on the minimum actual preload force, the maximum actual preload force and the stress-strain curve corresponding to the outer circular frame buffer pad to generate a corresponding check result.

[0037] Optionally, in some embodiments of the present application, after judging that the size data of the thermal insulation pad does not meet the preset requirements based on the verification result, adjusting the thermal insulation pad between the target battery cells includes:

[0038] If it is determined that the minimum actual preload force is less than the stress corresponding to the minimum material compression rate in the stress-strain curve, and / or if it is determined that the maximum actual preload force is greater than the stress corresponding to the maximum material compression rate in the stress-strain curve, it is determined that the thermal insulation pad size data does not meet the preset requirements;

[0039] Adjusting the thickness or material of the outer circular frame buffer pad;

[0040] The adjusted outer circular frame buffer pad is re-checked until the insulation pad size data meets the preset requirements.

[0041] Correspondingly, the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the method for designing a battery cell thermal insulation pad are as described in any one of the above.

[0042] The present application also provides a computer-readable storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the battery cell thermal insulation pad design method as described above are implemented.

[0043] An embodiment of the present application provides a method for designing a battery cell thermal insulation pad, an electronic device, and a storage medium. After obtaining the performance parameters of a target battery cell, the thermal insulation pad size data corresponding to the target battery cell is determined based on the performance parameters; then, the thermal insulation pad size data is verified to generate a corresponding verification result; finally, after determining that the thermal insulation pad size data does not meet the preset requirements based on the verification result, the thermal insulation pads between the target battery cells are adjusted.

[0044] The battery cell thermal insulation pad design scheme provided in the present application first designs the thermal insulation pad based on the performance parameters of the battery cell, determines the size of the thermal insulation pad by accurately predicting and adapting to the actual expansion behavior of the battery cell, and verifies the thermal insulation pad after designing it, thereby reducing the error between the design value and the actual value, effectively improving the accuracy of the design of the thermal insulation pad between battery cells, and further improving the preload stability and overall performance of the battery module, which is beneficial to the production efficiency and product quality of the battery module and meets the market demand for high-performance battery modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 It is a flow chart of a method for designing a battery cell thermal insulation pad provided in an embodiment of the present application;

[0047] Figure 2 is a schematic diagram of the structure of the thermal insulation pad provided in an embodiment of the present application;

[0048] Figure 3 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0050] Embodiments of the present application provide a method, device, electronic device and storage medium for designing a battery cell thermal insulation pad.

[0051] Among them, the battery cell insulation pad device can be specifically integrated in a terminal, the terminal can include a tablet computer or a personal computer (PC), the terminal can establish a wired or wireless connection with a server, the server can include an independently running server or a distributed server, and can also include a server cluster composed of multiple servers.

[0052] It should be noted that the order of description of the following embodiments is not intended to limit the priority order of the embodiments.

[0053] A method for designing thermal insulation pads for battery cells comprises: obtaining performance parameters of target battery cells; determining thermal insulation pad size data corresponding to the target battery cells based on the performance parameters; verifying the thermal insulation pad size data to generate corresponding verification results; and adjusting the thermal insulation pads between target battery cells after determining, based on the verification results, that the thermal insulation pad size data does not meet preset requirements.

[0054] See also Figure 1 , Figure 1 A schematic diagram of a process flow of a method for designing a thermal insulation pad for a battery cell provided in an embodiment of the present application. The specific process flow of the method for designing a thermal insulation pad for a battery cell may be as follows:

[0055] 101. Obtain performance parameters of the target battery cell.

[0056] For step 101, first obtain the performance parameters of the application object (target battery cell) of this thermal insulation pad design task, wherein the performance parameters include but are not limited to battery cell model, size data, expansion force data, expansion rate data, minimum preload force and maximum preload force, and positive and negative tolerance values. These performance parameter data are crucial for the subsequent design of the thermal insulation pad size. Specifically, the performance parameters of the target battery cell can be automatically searched in a pre-built database through computer software. For example, the relevant performance parameter data of the battery cell of the input battery cell model can be automatically found from the database to improve data acquisition efficiency.

[0057] Optionally, in some embodiments of the present application, step 101 of “obtaining performance parameters of a target battery cell” includes:

[0058] Obtain the target battery cell model and its corresponding battery cell size data;

[0059] Specifically, first identify the specific model of the battery cell and measure its size data, including length, width and height. The size data of the battery cell is the basis for designing the thermal insulation pad. Automated measuring equipment, such as laser scanners or 3D measuring instruments, can be used to improve the accuracy and measurement efficiency of the size data, ensure that the designed thermal insulation pad accurately matches the battery cell size, and reduce installation errors and material waste.

[0060] Perform a cyclic charge and discharge test on the target battery cell to obtain the expansion force data and expansion rate data of the target battery cell;

[0061] Specifically, by simulating the charging and discharging process of the battery cell in actual use, measuring the changes in the expansion force and expansion rate of the battery cell is crucial to determining the size of the thermal insulation pad. For example, using high-precision sensors and data acquisition systems to monitor the expansion of the battery cell during the charging and discharging process in real time and store the data for analysis. By providing accurate expansion data, it helps to design thermal insulation pads that can adapt to the expansion of the battery cell and reduce the risk of thermal runaway.

[0062] Performing an extrusion test on the target battery cell to obtain the minimum preload force and the maximum preload force of the target battery cell;

[0063] Specifically, the performance of the battery cell under different pressures is determined through extrusion testing, and the minimum and maximum preload forces are obtained to calculate the preload stress of the thermal insulation pad, where the minimum preload force of the battery cell is the minimum force value that meets the structural strength of the module, and the maximum preload force of the battery cell is the force value at which extrusion deformation occurs. For example, the extrusion force and speed are precisely controlled through automated testing equipment to ensure the consistency and reliability of the test results. Ensure that the thermal insulation pad can provide appropriate preload force to prevent the battery cell from shifting under vibration or impact, and improve the structural stability of the battery module.

[0064] Calculate the positive and negative tolerance values ​​of the target battery cell;

[0065] Specifically, based on the tolerance range in the battery cell manufacturing process, the positive and negative tolerance values ​​are calculated to consider the impact of changes in battery cell size on the thermal insulation pad design. For example, an advanced manufacturing execution system (MES) is integrated to monitor and record tolerance data in the battery cell production process in real time to optimize design parameters. By improving the flexibility and adaptability of the design, it is ensured that the thermal insulation pad can adapt to changes in battery cell size in different production batches.

[0066] Perform a thermal diffusion test on the target battery cell to obtain a thermal diffusion test result;

[0067] Specifically, the heat transfer characteristics of the battery cell at different temperatures are determined through thermal diffusion testing to design the thermal resistance performance of the thermal insulation pad. For example, thermal imaging cameras and thermal analysis instruments are used to accurately measure the temperature distribution and heat transfer path on the surface of the battery cell. By providing accurate thermal diffusion data, it helps to design a thermal insulation pad that can effectively isolate the heat of the battery cell and improve the thermal safety of the battery module.

[0068] 102. Based on the performance parameters, determine the thermal insulation pad size data corresponding to the target battery cell.

[0069] Using the collected performance parameters of the target battery cell, the specific size of the thermal insulation pad is calculated and determined, which may specifically include the size of the outer circular frame buffer pad and the middle thermal insulation pad.

[0070] Optionally, in some embodiments of the present application, Figure 2 As shown, the thermal insulation pad includes an outer circular frame buffer pad 1 and a middle thermal insulation pad 2. Step 102 "determine the thermal insulation pad size data corresponding to the target battery cell based on the performance parameters" may specifically include:

[0071] Determine the size data of the outer circular frame cushion based on the performance parameters and the material information of the outer circular frame cushion;

[0072] Specifically, the dimension data of the outer circular frame buffer pad, including width, height and thickness, are calculated and determined according to the performance parameters of the battery cell and the material properties of the outer circular frame buffer pad. In addition, the physical and chemical properties of different materials can be stored by building a material database so that suitable materials can be quickly queried and selected during design. Ensure that the outer circular frame buffer pad can withstand the maximum preload generated by the battery cell in the working state, while providing sufficient buffering and thermal insulation performance.

[0073] Based on the size data and performance parameters of the outer circular frame buffer pad, determine the size data of the middle insulation pad;

[0074] Specifically, the size of the middle thermal insulation pad is calculated based on the size of the outer circular frame buffer pad and the performance parameters of the battery cell, ensuring that the designed middle thermal insulation pad can effectively isolate the heat transfer between the battery cells. For example, computer-aided design (CAD) software is used to automatically generate a design plan for the middle thermal insulation pad based on the size of the outer circular frame buffer pad and the performance parameters of the battery cell. By improving the accuracy and efficiency of the middle thermal insulation pad design, it is ensured that it can meet the thermal management requirements of the battery cell.

[0075] Optionally, in some embodiments of the present application, the step of “determining the size data of the outer circular frame buffer pad based on the performance parameters and the material information of the outer circular frame buffer pad” may specifically include:

[0076] Based on the cell size data, determine the total width of the circular frame, the total height of the circular frame, and the width of the circular frame of the outer circular frame buffer pad;

[0077] Specifically, according to the actual size data of the battery cell, the total width and total height of the outer circular frame buffer pad are calculated, and the frame width of the circular frame is determined at the same time. For example, the total width of the outer circular frame = battery cell width - 10mm, the total height of the circular frame = battery cell shoulder height - 10mm, and the width of the circular frame = 10-30mm. The width of the circular frame can be appropriately adjusted according to the size of the battery cell. For example, increasing the area can help the battery cell to bear force.

[0078] Determine the thickness of the outer circular frame buffer pad based on the material information, minimum preload force and maximum preload force of the outer circular frame buffer pad;

[0079] Specifically, based on the characteristics of the cushion material and the preload requirements of the battery cell, the thickness of the outer circular frame cushion is calculated to ensure its performance under the expansion and preload of the battery cell, and to ensure that the cushion can still maintain good performance and structural integrity under the expansion and preload of the battery cell.

[0080] Optionally, in some embodiments of the present application, the step of “determining the thickness of the outer circular frame buffer pad based on the material information, minimum preload force and maximum preload force of the outer circular frame buffer pad” may specifically include:

[0081] The average value of the minimum preload force and the maximum preload force is selected as the theoretical preload force value;

[0082] Calculate the area of ​​the outer circular frame cushion;

[0083] Calculate the preload stress based on the area of ​​the outer circular frame buffer and the theoretical preload force;

[0084] Obtain the stress-strain curve corresponding to the material information of the outer circular frame buffer pad;

[0085] Based on the preload stress and stress-strain curve, determine the material compression rate under preload stress;

[0086] Calculate the thickness of the outer frame cushion based on the material compression rate and the target spacing design value between the cells.

[0087] Specifically, for the design of the thickness of the outer circular frame buffer pad, first calculate the average value of the minimum preload and the maximum preload to obtain the theoretical preload value as a reference value for the preload in the design; then, calculate its area based on the determined size of the outer circular frame buffer pad to provide basic data for the subsequent calculation of the preload stress; then, use the formula (preload / buffer pad area=preload stress) to calculate the preload stress; according to the type of buffer pad material, obtain its stress-strain curve to determine the compression behavior of the material under different stresses; then, according to the preload stress and stress-strain curve, determine the compression rate of the material under the stress to provide a basis for calculating the thickness of the buffer pad; finally, calculate the thickness of the buffer pad according to the formula buffer pad thickness=design value of gap between battery cells / (1-material compression rate); wherein, the gap size between battery cells is designed to be calculated based on the thickness of the thermal insulation pad, the thickness of the battery cell and the maximum expansion rate of the battery cell, and the specific formula is: gap between battery cells=thickness of thermal insulation pad+thickness of battery cell×maximum expansion rate of battery cell; the thickness of the thermal insulation pad is determined according to the requirements of the battery cell thermal diffusion test.

[0088] By accurately calculating the preload force and the thickness of the buffer pad, the accuracy of the design and the adaptability to different material properties are improved; the precisely designed buffer pad in this embodiment can provide appropriate preload force, reduce the risk of battery cell damage, and improve the safety of the battery module.

[0089] Optionally, in some embodiments of the present application, the step of “determining the size data of the middle heat insulation pad based on the size data and performance parameters of the outer circular frame buffer pad” may specifically include:

[0090] Determine the width of the middle heat insulation pad based on the total width of the circular frame and the width of the circular frame;

[0091] Specifically, the effective width of the middle thermal insulation pad is calculated by subtracting twice the frame width from the total width of the outer circular frame buffer pad, ensuring that the width of the thermal insulation pad accurately matches the space between the battery cells, thereby improving the thermal insulation efficiency and space utilization.

[0092] Determine the height of the middle heat insulation pad based on the total height of the circular frame and the width of the circular frame;

[0093] Specifically, similar to the calculation of width, the height of the middle thermal insulation pad is determined by subtracting twice the border width from the total height. The precise height design helps to ensure the thermal insulation effect of the thermal insulation pad in the vertical direction and prevent heat from being transferred vertically.

[0094] Based on the thermal diffusion test results, determine the thickness of the middle thermal insulation pad;

[0095] Specifically, based on the results of the thermal diffusion test of the battery cells, the minimum thickness of the intermediate thermal insulation pad is determined to meet the thermal resistance requirements. For example, integrated thermal analysis software can simulate the thermal resistance performance of thermal insulation pads of different thicknesses and automatically recommend the optimal thickness to ensure that the thermal insulation pad can effectively prevent heat transfer between battery cells and improve the thermal safety of the battery module.

[0096] 103. Verify the insulation pad size data and generate corresponding verification results.

[0097] Through calculation and comparison, verify whether the insulation pad size designed in the previous step meets the preset technical requirements, such as preload range, thermal diffusion performance, etc., and generate the verification result corresponding to the insulation pad size designed this time. Subsequently, the verification result is used to determine whether the insulation pad size meets the requirements.

[0098] Optionally, in some embodiments of the present application, step 103 of “calibrating the insulation pad size data and generating corresponding calibration results” may specifically include:

[0099] Based on the thickness of the outer circular frame buffer pad, the design value of the interval between the target chips and the negative tolerance value of the target battery cell, the minimum actual preload force of the outer circular frame buffer pad is calculated;

[0100] Based on the thickness of the outer circular frame buffer pad, the design value of the interval between the target chips and the positive tolerance value of the target battery cell, the maximum actual preload force of the outer circular frame buffer pad is calculated;

[0101] Based on the minimum actual preload force, the maximum actual preload force and the stress-strain curve corresponding to the outer circular frame buffer pad, a check is performed to generate corresponding check results.

[0102] Specifically, the verification of the insulation pad size data mainly includes the verification of the minimum actual preload and the maximum actual preload. Among them, for the verification of the minimum actual preload, the thickness of the outer circular frame buffer pad, the design gap between the cells, and the negative tolerance of the cell size are taken into account to calculate the minimum preload under the most unfavorable conditions (i.e., the smallest cell size), ensuring that even in the worst case where the cell size is small, the insulation pad can provide sufficient preload to maintain the stability of the cell structure. For the verification of the maximum actual preload, the positive tolerance of the cell size is taken into account to calculate the maximum preload under the most unfavorable conditions (i.e., the largest cell size), ensuring that even in the worst case where the cell size is large, the insulation pad will not be damaged by excessive preload, ensuring the safety of the cell and the insulation pad. Finally, the calculated minimum actual preload and maximum actual preload are compared with the stress-strain curve of the outer circular frame buffer material to determine whether the design requirements are met, ensuring that the insulation pad material will not exceed its material performance limit under the action of the preload, and avoiding material failure. By accurately checking the preload force, the reliability of the thermal insulation pad design can be improved and the risk of failure caused by improper design can be reduced.

[0103] 104. After judging that the insulation pad size data does not meet the preset requirements based on the verification results, adjust the insulation pads between the target battery cells.

[0104] If it is determined based on the verification results that the size of the currently designed thermal insulation pad does not meet the requirements, the design parameters of the thermal insulation pad need to be adjusted, including but not limited to adjusting the thickness of the thermal insulation pad and replacing the material of the thermal insulation pad until all preset technical standards are met.

[0105] Optionally, in some embodiments of the present application, step 104 “adjusting the thermal insulation pads between target battery cells after determining based on the verification result that the thermal insulation pad size data does not meet the preset requirements” may specifically include:

[0106] If it is determined that the minimum actual preload force is less than the stress corresponding to the minimum material compression rate in the stress-strain curve, and / or if it is determined that the maximum actual preload force is greater than the stress corresponding to the maximum material compression rate in the stress-strain curve, it is determined that the thermal insulation pad size data does not meet the preset requirements;

[0107] Adjust the thickness or material of the outer circular frame cushion;

[0108] Recheck the adjusted outer circular frame buffer pad until the insulation pad size data meets the preset requirements.

[0109] Specifically, in the verification step, if the calculated minimum actual preload or maximum actual preload exceeds the safety range defined by the material stress-strain curve, it is considered that the current thermal insulation pad design does not meet the requirements. According to the verification results, adjust the thickness of the outer circular frame buffer or replace the material with different stress-strain characteristics to meet the preload requirements. If the thickness of the outer circular frame buffer is adjusted, the thickness of the circular frame buffer is verified again. If the material of the buffer is reselected, the thickness of the circular frame buffer needs to be redesigned and verified again to ensure that all dimensional data and performance parameters meet the preset requirements.

[0110] An embodiment of the present application provides a method for designing a thermal insulation pad for a battery cell. The thermal insulation pad is first designed based on the performance parameters of the battery cell. The size of the thermal insulation pad is determined by accurately predicting and adapting to the actual expansion behavior of the battery cell. The thermal insulation pad is then checked after being designed, thereby reducing the error between the design value and the actual value, effectively improving the accuracy of the design of the thermal insulation pad between battery cells, and further improving the preload stability and overall performance of the battery module, which is beneficial to the production efficiency and product quality of the battery module and meets the market demand for high-performance battery modules.

[0111] In order to facilitate understanding of a battery cell thermal insulation pad design method of the present application, this embodiment also provides a specific implementation method, and the specific process is as follows:

[0112] Step (1), first determine the battery cell model used in the module design, including: ① Perform a cyclic charge and discharge test on the battery cell to obtain the expansion force and battery cell expansion rate data; ② Perform an extrusion test on the battery cell to obtain the minimum preload force of the battery cell (the minimum force value that meets the module structure strength) and the maximum preload force of the battery cell (the force value that causes extrusion deformation); ③ Confirm the positive and negative tolerance values ​​of the battery cell;

[0113] Step (2), the heat insulation cushion is divided into two parts, including: ① an outer circular frame cushion, ② a middle heat insulation cushion;

[0114] Step (3), designing the width and height of the outer circular frame buffer pad, wherein ① the total width of the circular frame = the width of the battery cell - 10 mm; ② the total height of the circular frame = the shoulder height of the battery cell - 10 mm; ③ the width of the circular frame = 10 to 30 mm, which can be appropriately adjusted according to the size of the battery cell, and increasing the area is conducive to the stress of the battery cell;

[0115] Step (4), designing the width and height of the thermal insulation pad, wherein: ① the width of the thermal insulation pad = the total width of the circular frame - the width of the frame × 2; ② the height of the thermal insulation pad = the height of the circular frame - the width of the frame × 2;

[0116] Step (5), designing the thickness of the thermal insulation pad, for example, determining the thickness of the thermal insulation pad according to the requirements of the battery core thermal diffusion test;

[0117] Step (6), designing the gap size between battery cells, the gap between battery cells = thickness of thermal insulation pad + thickness of battery cell × maximum expansion rate of battery cell;

[0118] Step (7), designing the thickness of the circular frame buffer pad, including: selecting the average value of the minimum preload force of the battery cell and the maximum preload force of the battery cell as the theoretical preload force value, ① theoretical preload force / buffer pad area = preload stress; ② confirming the buffer pad material, and finding the material compression rate under the corresponding theoretical preload stress according to the stress-strain curve of the buffer pad material between the battery cells, and the buffer pad thickness = the design value of the gap between the battery cells / (1-material compression rate);

[0119] Step (8), checking the thickness of the circular frame buffer pad, wherein the buffer pad must meet the following rules: ① (buffer pad thickness - gap between battery cells - negative tolerance value of battery cell) / buffer pad thickness = minimum material compression rate, the stress in the stress-strain curve corresponding to the minimum material compression rate is the minimum actual preload force, and the minimum actual preload force must be greater than the minimum preload force of the battery cell; ② (buffer pad thickness - gap between battery cells + positive tolerance value of battery cell) / buffer pad thickness = maximum actual preload force, the stress in the stress-strain curve corresponding to the maximum material compression rate is the maximum actual preload force, and the maximum actual preload force must be less than the maximum preload force of the battery cell;

[0120] Step (9), if the thickness of the circular frame cushion meets the requirements in step (8), the design is completed. If it does not meet the requirements, the cushion thickness is appropriately adjusted and the thickness of the circular frame cushion is checked again in step (8); or the cushion material is reselected and the thickness of the circular frame cushion is designed again in step (7).

[0121] In addition, the present application also provides an electronic device, such as Figure 3 As shown, it shows a schematic diagram of the structure of the electronic device involved in the embodiment of the present application, specifically:

[0122] The electronic device may include components such as a processor 301 with one or more processing cores, a memory 302 with one or more computer-readable storage media, a power supply 303, and an input unit 304. Those skilled in the art will appreciate that Figure 3 The electronic device structure shown in the figure does not constitute a limitation on the electronic device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0123] The processor 301 is the control center of the electronic device. It uses various interfaces and lines to connect various parts of the entire electronic device. By running or executing software programs and / or modules stored in the memory 302, and calling data stored in the memory 302, it executes various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. Optionally, the processor 301 may include one or more processing cores; preferably, the processor 301 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 301.

[0124] The memory 302 can be used to store software programs and modules. The processor 301 executes various functional applications and battery cell thermal insulation pads by running the software programs and modules stored in the memory 302. The memory 302 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 302 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory 302 may also include a memory controller to provide the processor 301 with access to the memory 302.

[0125] The electronic device also includes a power supply 303 for supplying power to each component. Preferably, the power supply 303 can be logically connected to the processor 301 through a power management system, so that the power management system can manage charging, discharging, power consumption and other functions. The power supply 303 can also include one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, power status indicators and other arbitrary components.

[0126] The electronic device may further include an input unit 304, which may be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

[0127] Although not shown, the electronic device may further include a display unit, etc., which will not be described in detail herein. Specifically in this embodiment, the processor 301 in the electronic device will load the executable files corresponding to the processes of one or more application programs into the memory 302 according to the following instructions, and the processor 301 will run the application programs stored in the memory 302, thereby realizing various functions, as follows:

[0128] Acquire performance parameters of a target battery cell; determine thermal insulation pad size data corresponding to the target battery cell based on the performance parameters; verify the thermal insulation pad size data to generate corresponding verification results; and adjust the thermal insulation pads between the target battery cells after determining that the thermal insulation pad size data does not meet preset requirements based on the verification results.

[0129] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0130] After obtaining the performance parameters of the target battery cell, the embodiment of the present application determines the insulation pad size data corresponding to the target battery cell based on the performance parameters; then, the insulation pad size data is verified to generate a corresponding verification result; finally, after judging that the insulation pad size data does not meet the preset requirements based on the verification result, the insulation pad between the target battery cells is adjusted. The battery cell insulation pad design scheme provided in the present application first designs the insulation pad based on the performance parameters of the battery cell, determines the size of the insulation pad by accurately predicting and adapting to the actual expansion behavior of the battery cell, and verifies after designing the insulation pad, thereby reducing the error between the design value and the actual value, effectively improving the accuracy of the design of the thermal pad between battery cells, and then improving the preload stability and overall performance of the battery module, which is conducive to the production efficiency and product quality of the battery module and meets the market demand for high-performance battery modules.

[0131] A person of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be completed by instructions, or by controlling related hardware through instructions. The instructions may be stored in a computer-readable storage medium and loaded and executed by a processor.

[0132] To this end, an embodiment of the present application provides a storage medium in which a plurality of instructions are stored, and the instructions can be loaded by a processor to execute the steps in any of the battery cell thermal insulation pad design methods provided in the embodiments of the present application. For example, the instructions can execute the following steps:

[0133] Acquire performance parameters of a target battery cell; determine thermal insulation pad size data corresponding to the target battery cell based on the performance parameters; verify the thermal insulation pad size data to generate corresponding verification results; and adjust the thermal insulation pads between the target battery cells after determining that the thermal insulation pad size data does not meet preset requirements based on the verification results.

[0134] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0135] The storage medium may include: a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0136] Since the instructions stored in the storage medium can execute the steps in any battery cell thermal insulation pad design method provided in the embodiments of the present application, the beneficial effects that can be achieved by any battery cell thermal insulation pad design method provided in the embodiments of the present application can be achieved. Please see the previous embodiments for details and will not be repeated here.

[0137] The above is a detailed introduction to a battery cell thermal insulation pad design method, device, electronic device and storage medium provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, based on the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for designing a battery cell thermal insulation pad, characterized in that: include: Obtain the performance parameters of the target battery cell; Based on the performance parameters, determining the thermal insulation pad size data corresponding to the target battery cell; Verifying the thermal insulation pad size data and generating corresponding verification results; After determining that the thermal insulation pad size data does not meet the preset requirements based on the verification result, the thermal insulation pads between the target battery cells are adjusted.

2. The method for designing a battery cell thermal insulation pad according to claim 1, characterized in that: The obtaining of the performance parameters of the target battery cell includes: Obtaining the battery cell model of the target battery cell and its corresponding battery cell size data; Performing a cyclic charge-discharge test on the target battery cell to obtain expansion force data and expansion rate data of the target battery cell; Performing an extrusion test on the target battery cell to obtain a minimum preload force and a maximum preload force of the target battery cell; Calculating a positive tolerance value and a negative tolerance value of the target battery cell; A thermal diffusion test is performed on the target battery cell to obtain a thermal diffusion test result.

3. The method for designing a battery cell thermal insulation pad according to claim 2, characterized in that: The thermal insulation pad includes an outer circular frame buffer pad and a middle thermal insulation pad, and the step of determining the thermal insulation pad size data corresponding to the target battery cell based on the performance parameter includes: Determining the size data of the outer circular frame buffer pad based on the performance parameter and the material information of the outer circular frame buffer pad; Based on the size data of the outer circular frame buffer pad and the performance parameters, the size data of the middle thermal insulation pad is determined.

4. The method for designing a battery cell thermal insulation pad according to claim 3, characterized in that: The step of determining the size data of the outer circular frame buffer pad based on the performance parameter and the material information of the outer circular frame buffer pad comprises: Based on the battery cell size data, determine the total width, total height and width of the circular frame of the outer circular frame buffer pad; The thickness of the outer circular frame buffer pad is determined based on the material information of the outer circular frame buffer pad, the minimum preload force, and the maximum preload force.

5. The method for designing a battery cell thermal insulation pad according to claim 4, characterized in that: Determining the thickness of the outer circular frame buffer pad based on the material information of the outer circular frame buffer pad, the minimum preload force, and the maximum preload force includes: Selecting an average value of the minimum preload force and the maximum preload force as a theoretical preload force value; Calculating the area of ​​the outer circular frame buffer pad; Calculating the preload stress based on the area of ​​the outer circular frame buffer pad and the theoretical preload force; Obtaining a stress-strain curve corresponding to the material information of the outer circular frame buffer pad; Determining a material compression rate under the prestress based on the prestress and the stress-strain curve; The thickness of the outer circular frame buffer pad is calculated based on the material compression rate and the target interval design value between the battery cells.

6. The method for designing a battery cell thermal insulation pad according to claim 4, characterized in that: The step of determining the size data of the middle heat insulation pad based on the size data of the outer circular frame buffer pad and the performance parameter comprises: Determine the width of the middle heat insulation pad based on the total width of the circular frame and the width of the circular frame; Determine the height of the middle heat insulation pad based on the total height of the circular frame and the width of the circular frame; Based on the thermal diffusion test results, the thickness of the intermediate thermal insulation pad is determined.

7. The method for designing a battery core thermal insulation pad according to any one of claims 1 to 6, characterized in that: The step of verifying the thermal insulation pad size data and generating corresponding verification results includes: Based on the thickness of the outer circular frame buffer pad, the design value of the interval between the target chips and the negative tolerance value of the target battery cell, the minimum actual preload force of the outer circular frame buffer pad is calculated; Based on the thickness of the outer circular frame buffer pad, the design value of the interval between the target chips and the positive tolerance value of the target battery cell, the maximum actual preload force of the outer circular frame buffer pad is calculated; A check is performed based on the minimum actual preload force, the maximum actual preload force and the stress-strain curve corresponding to the outer circular frame buffer pad to generate a corresponding check result.

8. The method for designing a battery cell thermal insulation pad according to claim 7, characterized in that: After judging that the size data of the thermal insulation pad does not meet the preset requirements based on the verification result, adjusting the thermal insulation pad between the target battery cells includes: If it is determined that the minimum actual preload force is less than the stress corresponding to the minimum material compression rate in the stress-strain curve, and / or if it is determined that the maximum actual preload force is greater than the stress corresponding to the maximum material compression rate in the stress-strain curve, it is determined that the thermal insulation pad size data does not meet the preset requirements; Adjusting the thickness or material of the outer circular frame buffer pad; The adjusted outer circular frame buffer pad is re-checked until the insulation pad size data meets the preset requirements.

9. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the battery cell thermal insulation pad design method as described in any one of claims 1-8 are implemented.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, wherein when the computer program is executed by a processor, the steps of the method for designing a battery cell thermal insulation pad as described in any one of claims 1-8 are implemented.

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