Cell heat-insulation pad design method, electronic device and storage medium

Abstract

Disclosed in the present application are a cell heat-insulation pad design method, an electronic device and a storage medium. The method comprises: acquiring performance parameters of target cells; on the basis of the performance parameters, determining size data of a heat-insulation pad corresponding to the target cells; verifying the size data of the heat-insulation pad to generate a corresponding verification result; and after it is determined on the basis of the verification result that the size data of the heat insulation pad does not meet a preset requirement, adjusting the heat-insulation pad between the target cells.

Description

Battery cell thermal pad design method, electronic devices and storage media

[0001] This application claims priority to Chinese Patent Application No. 202510080967.3, filed with the Chinese Patent Office on January 17, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, specifically to a cell heat insulation pad design method, electronic equipment, and storage medium. Background Technology

[0003] With the development of new energy technologies, battery modules, as core components of electric vehicles and energy storage systems, have received widespread attention for their performance and reliability. The performance of a battery module depends not only on the quality of the battery cells themselves but also on the design of the inter-cell buffer pads. These buffer pads provide the necessary preload to maintain tight contact between the cells, preventing displacement under vibration or impact, while also serving as heat insulation and cushioning.

[0004] In related technologies, the design method of buffer pads between battery cells is usually based on the width and height of the battery cell to determine the size of the buffer pad, and the thickness of the buffer pad is calculated according to the preload stress and the stress-strain curve of the material, so as to meet the design requirements of the battery module. Invention Overview

[0005] However, due to tolerances in the component manufacturing process, there are errors between the actual gap values ​​between battery cells and the design values, resulting in a deviation between the actual compression ratio of the buffer pad and the theoretically calculated value. Simultaneously, the battery cells expand during charging and discharging, leading to instability in the module's preload, affecting the structural strength and thermal management performance of the battery module, and reducing its reliability and safety.

[0006] In a first aspect, this application provides a method for designing a cell heat insulation pad, including:

[0007] Obtain the performance parameters of the target battery cell;

[0008] Based on performance parameters, determine the size data of the heat insulation pad corresponding to the target battery cell;

[0009] Verify the dimensions of the thermal insulation pad and generate the corresponding verification results;

[0010] After determining that the size data of the heat insulation pad does not meet the preset requirements based on the verification results, the heat insulation pad between the target cells is adjusted.

[0011] Secondly, this 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 the processor executes the program as the steps of the cell heat insulation pad design method provided in the first aspect.

[0012] Thirdly, this application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the cell heat insulation pad design method provided in the first aspect. Beneficial effects

[0013] The cell insulation pad design method provided in this application involves obtaining the performance parameters of the target cell, determining the insulation pad size data corresponding to the target cell based on the performance parameters, verifying the insulation pad size data, generating corresponding verification results, and finally adjusting the insulation pad between the target cells after determining that the insulation pad size data does not meet the preset requirements based on the verification results.

[0014] The cell heat insulation pad design scheme provided in this application first designs the heat insulation pad based on the performance parameters of the cell. By accurately predicting and adapting to the actual expansion behavior of the cell, the size of the heat insulation pad is determined. After the heat insulation pad is designed, it is checked, thereby reducing the error between the design value and the actual value, effectively improving the accuracy of the cell heat insulation pad design, and thus improving the pre-tightening stability and overall performance of the battery module. This helps to improve the production efficiency and product quality of the battery module and meet the market demand for high-performance battery modules. Attached Figure Description

[0015] Figure 1 is a flowchart illustrating the design method of the cell heat insulation pad provided in this application;

[0016] Figure 2 is a schematic diagram of the structure of the heat insulation pad provided in this application;

[0017] Figure 3 is a schematic diagram of the structure of the electronic device provided in this application. Embodiments of the present invention

[0018] In related technologies, the design method for inter-cell buffer pads mainly determines the size of the buffer pad based on the width and height dimensions of the cell, and calculates the thickness of the buffer pad based on the preload stress and the stress-strain curve of the material. While this method can theoretically meet the design requirements of battery modules, it faces some insurmountable problems in actual production.

[0019] First, due to tolerances in the manufacturing process of components, there is an error between the actual gap value between battery cells and the design value, which will cause the actual compression rate of the buffer pad to deviate from the theoretical calculation value.

[0020] Secondly, the battery cell expands during charging and discharging, and this design method fails to fully consider the impact of cell expansion on the performance of the buffer pad, which will ultimately lead to 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.

[0021] Therefore, embodiments of this application provide a method, apparatus, electronic device, and storage medium for designing a cell heat insulation pad.

[0022] Specifically, the battery cell heat insulation pad device can be integrated into a terminal, which may include a tablet computer or a personal computer (PC). The terminal can establish a wired or wireless connection with a server, which may include a standalone server or a distributed server, or a server cluster consisting of multiple servers.

[0023] The following sections provide detailed descriptions of each example. It should be noted that the order in which the embodiments are described is not intended to limit the priority of the embodiments.

[0024] A method for designing a thermal insulation pad for a battery cell includes: acquiring performance parameters of a target battery cell; determining the size data of the thermal insulation pad corresponding to the target battery cell based on the performance parameters; verifying the size data of the thermal insulation pad and generating a corresponding verification result; and adjusting the thermal insulation pad between the target battery cells after determining that the size data of the thermal insulation pad does not meet the preset requirements based on the verification result.

[0025] Please refer to Figure 1, which is a flowchart illustrating the battery cell heat insulation pad design method provided in this application. The specific flow of this battery cell heat insulation pad design method is as follows:

[0026] 101. Obtain the performance parameters of the target battery cell.

[0027] For step 101, first obtain the performance parameters of the target battery cell (the object of this thermal insulation pad design task). These performance parameters include, but are not limited to, the battery cell model, size data, expansion force data, expansion rate data, minimum 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 dimensions.

[0028] Specifically, computer software can automatically search for the performance parameters of a target battery cell in a pre-built database. For example, by inputting the battery cell model, the relevant performance parameter data of that model of battery cell can be automatically retrieved from the database, thereby improving data acquisition efficiency.

[0029] In some embodiments, step 101, "obtaining the performance parameters of the target cell", includes:

[0030] Obtain the target battery cell's cell model and its corresponding cell size data;

[0031] Specifically, the first step is to identify the specific model of the battery cell and measure its dimensions, including length, width, and height. These dimensions form the basis for designing the thermal insulation pad. This application can utilize automated measuring equipment, such as laser scanners or 3D measuring instruments, to improve the accuracy and efficiency of the dimensional data, ensuring a precise match between the designed thermal insulation pad and the battery cell dimensions, thus reducing installation errors and material waste.

[0032] Cyclic charge-discharge tests were conducted on the target battery cell to obtain data on its expansion force and expansion rate.

[0033] Specifically, simulating the charging and discharging process of battery cells in actual use and measuring the changes in cell expansion force and rate is crucial for determining the size of thermal insulation pads. For example, high-precision sensors and data acquisition systems can be used to monitor the expansion of the battery cells during charging and discharging in real time and store the data for analysis. Providing accurate expansion data helps in designing thermal insulation pads that can accommodate cell expansion, reducing the risk of thermal runaway.

[0034] The target battery cell is subjected to a compression test to obtain the minimum and maximum preload force of the target battery cell;

[0035] Specifically, the performance of the battery cell under different pressures is determined through extrusion testing to obtain the minimum and maximum preload forces, which are then used to calculate the preload stress of the thermal insulation pad. The minimum preload force of the battery cell is the minimum force required to meet the structural strength requirements of the module, while the maximum preload force is the force required to induce extrusion deformation.

[0036] For example, by using automated testing equipment to precisely control the extrusion force and speed, the consistency and reliability of test results can be ensured. This ensures that the heat insulation pad provides appropriate preload, preventing cell displacement under vibration or impact and improving the structural stability of the battery module.

[0037] Calculate the positive and negative tolerance values ​​of the target battery cell;

[0038] Specifically, positive and negative tolerance values ​​are calculated based on the tolerance range during the battery cell manufacturing process to account for the impact of variations in battery cell dimensions on the thermal insulation pad design. For example, an advanced Manufacturing Execution System (MES) can be integrated to monitor and record tolerance data during battery cell production in real time, thereby optimizing design parameters. This application ensures that the thermal insulation pad can adapt to variations in battery cell dimensions across different production batches by improving design flexibility and adaptability.

[0039] Thermal diffusion test was performed on the target battery cell to obtain the thermal diffusion test results;

[0040] Specifically, thermal diffusion testing determines the heat transfer characteristics of the battery cell at different temperatures to design the thermal resistance performance of the 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 battery cell surface. This application provides accurate thermal diffusion data to help design insulation pads that effectively isolate heat from the battery cell, thereby improving the thermal safety of the battery module.

[0041] 102. Based on performance parameters, determine the size data of the heat insulation pad corresponding to the target battery cell.

[0042] This application can use the collected performance parameters of the target battery cell to calculate and determine the specific dimensions of the heat insulation pad, which may include the dimensions of the outer loop-shaped buffer pad and the middle heat insulation pad.

[0043] In some embodiments, as shown in FIG2, the heat insulation pad includes an outer U-shaped frame buffer pad 1 and a middle heat insulation pad 2. Step 102, "Determine the heat insulation pad size data corresponding to the target cell based on performance parameters," may specifically include:

[0044] Based on performance parameters and material information of the outer loop-shaped buffer pad, determine the size data of the outer loop-shaped buffer pad;

[0045] Specifically, the dimensions of the outer ring buffer pad, including width, height, and thickness, are calculated and determined based on the performance parameters of the battery cell and the material properties of the outer ring buffer pad.

[0046] Additionally, a materials database can be built to store the physical and chemical properties of different materials, allowing for quick retrieval and selection of suitable materials during the design phase. It is essential to ensure that the outer U-shaped frame buffer can withstand the maximum preload generated by the battery cell during operation, while providing sufficient cushioning and thermal insulation.

[0047] Based on the size data and performance parameters of the outer loop frame buffer pad, the size data of the middle heat insulation pad is determined;

[0048] Specifically, the size of the intermediate thermal pad is calculated based on the size of the outer loop-shaped buffer pad and the performance parameters of the battery cell, ensuring that the designed intermediate thermal pad can effectively isolate heat transfer between the battery cells.

[0049] For example, computer-aided design (CAD) software can be used to automatically generate a design scheme for the intermediate thermal pad based on the dimensions of the outer loop-shaped buffer pad and the cell performance parameters. This application improves the accuracy and efficiency of the intermediate thermal pad design, ensuring that it meets the needs of cell thermal management.

[0050] In some embodiments, the step "determining the size data of the outer loop frame buffer pad based on performance parameters and material information of the outer loop frame buffer pad" may specifically include:

[0051] Based on the cell size data, determine the total width, total height, and width of the outer loop frame buffer pad;

[0052] Specifically, based on the actual size data of the battery cell, the total width and total height of the outer loop frame buffer pad are calculated, and the border width of the loop frame is determined.

[0053] For example, the total width of the outer ring frame = cell width - 10mm, the total height of the ring frame = cell shoulder height - 10mm, and the width of the ring frame = 10~30mm. The width of the ring frame can be adjusted appropriately according to the size of the cell. For example, increasing the area can help the cell withstand force.

[0054] Based on the material information, minimum preload, and maximum preload of the outer loop frame buffer pad, the thickness of the outer loop frame buffer pad is determined.

[0055] Specifically, based on the characteristics of the buffer pad material and the preload requirements of the battery cell, the thickness of the outer loop frame buffer pad is calculated to ensure its performance under the action of battery cell expansion and preload, and to ensure that the buffer pad can still maintain good performance and structural integrity under the action of battery cell expansion and preload.

[0056] In some embodiments, the step of "determining the thickness of the outer loop frame buffer pad based on the material information, minimum preload, and maximum preload of the outer loop frame buffer pad" may specifically include:

[0057] The average value of the minimum and maximum preload is selected as the theoretical preload value.

[0058] Calculate the area of ​​the outer loop-shaped buffer pad;

[0059] Calculate the preload stress based on the area of ​​the outer loop frame buffer pad and the theoretical preload force;

[0060] Obtain the stress-strain curve corresponding to the material information of the outer loop-shaped buffer pad;

[0061] Based on the preload and stress-strain curves, the material compressibility under preload is determined;

[0062] The thickness of the outer loop-shaped buffer pad is calculated based on the material compressibility and the design value of the spacing between the target cells.

[0063] Specifically, for the design of the thickness of the outer loop-shaped buffer pad, firstly, the average of the minimum and maximum preload is calculated to obtain the theoretical preload value, which serves as a reference value for the preload in the design. Then, based on the determined dimensions of the outer loop-shaped buffer pad, its area is calculated to provide basic data for subsequent calculation of the preload stress. Next, the preload stress is calculated using the formula (preload / buffer pad area = preload stress). According to the type of buffer pad material, its stress-strain curve is obtained to determine the compression behavior of the material under different stresses. Then, based on the preload stress and stress-strain curve, the compressibility of the material under that stress is determined, providing a basis for calculating the buffer pad thickness. Finally, the thickness of the buffer pad is calculated using the formula: buffer pad thickness = cell gap design value / (1 - material compressibility).

[0064] The gap size between battery cells is designed based on the thickness of the heat insulation pad, the thickness of the battery cell, and the maximum expansion rate of the battery cell. The specific formula is: gap between battery cells = thickness of heat insulation pad + thickness of battery cell × maximum expansion rate of battery cell; the thickness of the heat insulation pad is determined according to the requirements of the battery cell thermal diffusion test.

[0065] This application improves the accuracy of the design and its adaptability to different material properties by accurately calculating the preload and buffer pad thickness. The precisely designed buffer pad in this embodiment can provide appropriate preload, which can reduce the risk of cell damage and improve the safety of the battery module.

[0066] In some embodiments, the step of "determining the size data of the intermediate heat-insulating pad based on the size data and performance parameters of the outer loop-shaped buffer pad" may specifically include:

[0067] Determine the width of the heat-insulating pad in the middle based on the total width of the loop frame and the width of the loop border;

[0068] Specifically, the effective width of the middle heat insulation pad is calculated by subtracting twice the width of the border from the total width of the outer ring buffer pad, ensuring that the width of the heat insulation pad is precisely matched with the space between the battery cells, thereby improving heat insulation efficiency and space utilization.

[0069] Determine the height of the heat-insulating pad in the middle based on the total height of the loop frame and the width of the loop frame;

[0070] Specifically, similar to the width calculation, the height of the middle heat insulation pad is determined by subtracting twice the border width from the total height. Precise height design helps ensure the heat insulation effect of the heat insulation pad in the vertical direction and prevents heat from being transferred vertically.

[0071] Based on the results of the thermal diffusion test, the thickness of the intermediate heat-insulating pad was determined;

[0072] Specifically, based on the results of the cell thermal diffusion test, the minimum thickness required for the intermediate thermal pad is determined to meet the thermal resistance requirements.

[0073] For example, by integrating thermal analysis software to simulate the thermal resistance performance of insulation pads of different thicknesses and automatically recommending the optimal thickness, it can be ensured that the insulation pad can effectively prevent heat transfer between battery cells and improve the thermal safety of the battery module.

[0074] 103. Verify the dimensions of the heat insulation pad and generate the corresponding verification results.

[0075] In this application, by calculation and comparison, it is verified whether the size of the heat insulation pad designed in the previous step meets the preset technical requirements, such as the preload range and heat diffusion performance, and the verification result corresponding to the size of the heat insulation pad designed in this application is generated. Subsequently, the verification result is used to determine whether the size of the heat insulation pad meets the requirements.

[0076] In some embodiments, step 103, "verifying the insulation pad size data and generating corresponding verification results," may specifically include:

[0077] Based on the thickness of the outer loop-shaped buffer pad, the design value of the spacing between the target chips, and the negative tolerance value of the target cell, the minimum actual preload of the outer loop-shaped buffer pad is calculated.

[0078] Based on the thickness of the outer ring buffer pad, the design value of the spacing between target chips, and the positive tolerance value of the target cell, the maximum actual preload of the outer ring buffer pad is calculated.

[0079] The verification is performed based on the minimum actual preload, the maximum actual preload, and the stress-strain curves corresponding to the outer loop frame buffer pad, and the corresponding verification results are generated.

[0080] Specifically, the verification of the thermal insulation pad's dimensional data mainly includes the verification of the minimum and maximum actual preload. For the verification of the minimum actual preload, considering the thickness of the outer U-shaped frame buffer pad, the design gap between battery cells, and the negative tolerance of the battery cell dimensions, the minimum preload is calculated under the worst-case scenario (i.e., the smallest battery cell size). This ensures that even in the worst-case scenario where the battery cell size is small, the thermal insulation pad can provide sufficient preload to maintain the stability of the battery cell structure.

[0081] For the verification of the maximum actual preload, taking into account the positive tolerance of the cell size, the maximum preload is calculated under the most unfavorable condition (i.e., the largest cell size). This ensures that even in the worst case where the cell size is too large, the heat insulation pad will not be damaged by excessive preload, thus guaranteeing the safety of the cell and the heat insulation pad.

[0082] Finally, the calculated minimum and maximum actual preload are compared with the stress-strain curve of the outer loop frame buffer pad material to determine whether the design requirements are met, ensuring that the thermal insulation pad material does not exceed its material performance limits under preload and avoiding material failure. This application improves the reliability of thermal insulation pad design and reduces the risk of failure due to improper design by accurately verifying the preload.

[0083] 104. After determining that the size data of the heat insulation pad does not meet the preset requirements based on the verification results, adjust the heat insulation pad between the target cells.

[0084] If the verification results indicate that the current design dimensions of the insulation pad do not meet the requirements, the design parameters of the insulation pad need to be adjusted, including but not limited to adjusting the thickness of the insulation pad and changing the material of the insulation pad, until all preset technical standards are met.

[0085] In some embodiments, step 104, "after determining that the size data of the heat insulation pad does not meet the preset requirements based on the verification results, adjusting the heat insulation pad between the target cells," may specifically include:

[0086] If the minimum actual preload is determined to be less than the stress corresponding to the minimum material compressibility in the stress-strain curve, and / or if the maximum actual preload is determined to be greater than the stress corresponding to the maximum material compressibility in the stress-strain curve, then the thermal insulation pad size data is determined to be inconsistent with the preset requirements.

[0087] Adjust the thickness or material of the outer loop frame buffer pad;

[0088] The adjusted outer ring-shaped buffer pad is re-checked until the size data of the heat insulation pad meets the preset requirements.

[0089] Specifically, during the verification process, if the calculated minimum or maximum actual preload exceeds the safe range defined by the material stress-strain curve, the current thermal insulation pad design is considered to be unacceptable.

[0090] Based on the verification results, this application can adjust the thickness of the outer loop frame buffer pad or replace it with materials having different stress-strain characteristics to meet the preload requirements. If the thickness of the outer loop frame buffer pad is adjusted, the thickness dimension of the loop frame buffer pad should be verified again. If the buffer pad material is reselected, the thickness dimension of the loop frame buffer pad needs to be redesigned and verified again to ensure that all dimensional data and performance parameters meet the preset requirements.

[0091] The cell heat insulation pad design method provided in this application can first design the heat insulation pad by comprehensively considering the performance parameters of the cell, determine the size of the heat insulation pad by accurately predicting and adapting to the actual expansion behavior of the cell, and verify the design after the heat insulation pad is designed, thereby reducing the error between the design value and the actual value, effectively improving the accuracy of the cell heat insulation pad design, and thus improving the pre-tightening stability and overall performance of the battery module, which helps to improve the production efficiency and product quality of the battery module and meet the market demand for high-performance battery modules.

[0092] To facilitate understanding of the battery cell heat insulation pad design method of this application, this embodiment also provides a specific implementation method, the specific process of which is as follows:

[0093] Step (1): First, determine the cell model used in the module design, including: conducting cyclic charge and discharge tests on the cell to obtain expansion force and cell expansion rate data; conducting extrusion tests on the cell to obtain the minimum preload force (the minimum force value that meets the structural strength of the module) and the maximum preload force (the force value that causes extrusion deformation); confirming the positive and negative tolerance values ​​of the cell.

[0094] Step (2): The heat insulation cushion is divided into two parts, including: the outer ring-shaped cushion and the middle heat insulation cushion.

[0095] Step (3): Design the width and height dimensions of the outer loop frame buffer pad. The total width of the loop frame is equal to the width of the battery cell - 10mm; the total height of the loop frame is equal to the shoulder height of the battery cell - 10mm; the width of the loop frame is 10~30mm, which can be adjusted appropriately according to the size of the battery cell. Increasing the area is beneficial to the battery cell bearing the force.

[0096] Step (4): Design the dimensions of the heat insulation pad, where the width of the heat insulation pad = the total width of the U-shaped frame - the width of the border × 2; the height of the heat insulation pad = the height of the U-shaped frame - the width of the border × 2.

[0097] Step (5): Design the dimensions of the insulation pad thickness, for example, determine the insulation pad thickness according to the requirements of the cell thermal diffusion test.

[0098] Step (6): Design the gap size between the cells. The gap between cells = the thickness of the heat insulation pad + the thickness of the cell × the maximum expansion rate of the cell.

[0099] Step (7) Design the thickness of the buffer pad of the U-shaped frame, including: selecting the average value of the minimum preload and the maximum preload of the battery cell as the theoretical preload value, theoretical preload / buffer pad area = preload stress; confirm the buffer pad material, and find the material compression ratio under the corresponding theoretical preload stress according to the stress-strain curve of the buffer pad material between the battery cells, buffer pad thickness = design value of gap between battery cells / (1 - material compression ratio).

[0100] Step (8): Check the thickness of the buffer pad of the U-shaped frame. The buffer pad must meet the following rules: (buffer pad thickness - gap between cells - negative tolerance of cells) / buffer pad thickness = minimum material compression ratio. The stress in the stress-strain curve corresponding to the minimum material compression ratio is the minimum actual preload. The minimum actual preload must be greater than the minimum preload of the cell. (buffer pad thickness - gap between cells + positive tolerance of cells) / buffer pad thickness = maximum actual preload. The stress in the stress-strain curve corresponding to the maximum material compression ratio is the maximum actual preload. The maximum actual preload must be less than the maximum preload of the cell.

[0101] Step (9): If the thickness of the buffer pad meets the requirements in step (8), the design is complete. If it does not meet the requirements, adjust the thickness of the buffer pad appropriately and perform step (8) again to check the thickness of the buffer pad; or reselect the buffer pad material and return to step (7) to redesign the thickness of the buffer pad.

[0102] Furthermore, this application also provides an electronic device, as shown in FIG3, which illustrates a structural schematic diagram of the electronic device involved in this application embodiment. Specifically:

[0103] 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 understand that the electronic device structure shown in FIG3 does not constitute a limitation on the electronic device, and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Wherein:

[0104] The processor 301 is the control center of the electronic device. It connects various parts of the electronic device via various interfaces and lines, and performs various functions and processes data by running or executing software programs and / or modules stored in the memory 302, and by calling data stored in the memory 302, thereby providing overall monitoring of the electronic device. 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 handles the operating system, user interface, and applications, and the modem processor mainly handles wireless communication. It is understood that the modem processor provided in this application may also be optional and not integrated into the processor 301.

[0105] The memory 302 can be configured to store software programs and modules. The processor 301 executes various functional applications and cell 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. The program storage area may store the operating system, at least one application program required for a function (such as sound playback function, 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 high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0106] In some embodiments, memory 302 may further include a memory controller to provide processor 301 with access to memory 302.

[0107] The electronic device also includes a power supply 303 that supplies power to various components. Preferably, the power supply 303 can be logically connected to the processor 301 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 303 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0108] The electronic device may also include an input unit 304, which can be configured to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0109] Although not shown, the electronic device may also include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 301 in the electronic device loads the executable files corresponding to the processes of one or more applications into the memory 302 according to the following instructions, and the processor 301 runs the applications stored in the memory 302 to realize various functions, as follows:

[0110] Obtain the performance parameters of the target battery cell; based on the performance parameters, determine the size data of the heat insulation pad corresponding to the target battery cell; verify the size data of the heat insulation pad and generate the corresponding verification results; if the size data of the heat insulation pad does not meet the preset requirements based on the verification results, adjust the heat insulation pad between the target battery cells.

[0111] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0112] This application, after obtaining the performance parameters of the target battery cell, determines the size data of the corresponding heat insulation pad based on the performance parameters. Next, the size data of the heat insulation pad is verified, generating corresponding verification results. Finally, if the verification results indicate that the size data of the heat insulation pad does not meet the preset requirements, the heat insulation pads between the target battery cells are adjusted. The battery cell heat insulation pad design scheme provided in this application first designs the heat insulation pad based on the performance parameters of the battery cell, determines the size of the heat insulation pad by accurately predicting and adapting to the actual expansion behavior of the battery cell, and verifies the design after designing the heat insulation pad. This reduces the error between the design value and the actual value, effectively improves the accuracy of the battery cell spacer heat insulation pad design, and thus improves the pre-tightening force stability and overall performance of the battery module. This contributes to the production efficiency and product quality of the battery module, meeting the market demand for high-performance battery modules.

[0113] Those skilled in the art will understand that all or part of the steps in the various methods of the embodiments provided in this application can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0114] Therefore, embodiments of this application provide a storage medium storing a plurality of instructions that can be loaded by a processor to execute the steps in any of the battery cell heat insulation pad design methods provided in embodiments of this application. For example, the instructions can execute the following steps:

[0115] Obtain the performance parameters of the target battery cell; based on the performance parameters, determine the size data of the heat insulation pad corresponding to the target battery cell; verify the size data of the heat insulation pad and generate the corresponding verification results; if the size data of the heat insulation pad does not meet the preset requirements based on the verification results, adjust the heat insulation pad between the target battery cells.

[0116] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0117] The storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0118] Since the instructions stored in the storage medium can execute the steps in any of the battery cell heat insulation pad design methods provided in the embodiments of this application, the beneficial effects that any of the battery cell heat insulation pad design methods provided in the embodiments of this application can achieve can be realized. For details, please refer to the previous embodiments, which will not be repeated here.

Claims

1. A method for designing a cell heat insulation pad, comprising: Obtain the performance parameters of the target battery cell; Based on the performance parameters, determine the size data of the heat insulation pad corresponding to the target battery cell; The dimensions of the heat insulation pad are verified, and corresponding verification results are generated. After determining that the size data of the heat insulation pad does not meet the preset requirements based on the verification results, the heat insulation pad between the target cells is adjusted.

2. The cell heat insulation pad design method according to claim 1, wherein, The acquisition of the performance parameters of the target battery cell includes: Obtain the cell model and corresponding cell size data of the target cell; The target battery cell was subjected to a cyclic charge-discharge test to obtain the expansion force data and expansion rate data of the target battery cell; The target battery cell is subjected to a compression test to obtain the minimum and maximum preload force of the target battery cell; Calculate the positive and negative tolerance values ​​of the target battery cell; A thermal diffusion test was performed on the target battery cell to obtain the thermal diffusion test results.

3. The cell heat insulation pad design method according to any one of claims 1-2, wherein, The heat insulation pad includes an outer U-shaped frame buffer pad and a middle heat insulation pad. Therefore, determining the heat insulation pad size data corresponding to the target battery cell based on the performance parameters includes: Based on the performance parameters and the material information of the outer loop-shaped buffer pad, the size data of the outer loop-shaped buffer pad is determined; Based on the size data of the outer loop-shaped buffer pad and the performance parameters, the size data of the middle heat-insulating pad is determined.

4. The cell heat insulation pad design method according to any one of claims 1-3, wherein, The determination of the size data of the outer loop-shaped frame buffer pad based on the performance parameters and the material information of the outer loop-shaped frame buffer pad includes: Based on the cell size data, determine the total width, total height, and width of the outer loop frame buffer pad; The thickness of the outer loop-shaped buffer pad is determined based on the material information of the outer loop-shaped buffer pad, the minimum preload, and the maximum preload.

5. The cell heat insulation pad design method according to any one of claims 1-4, wherein, Based on the material information of the outer loop-shaped buffer pad, the minimum preload, and the maximum preload, the thickness of the outer loop-shaped buffer pad is determined, including: The average value of the minimum preload and the maximum preload is selected as the theoretical preload value; Calculate the area of ​​the outer loop-shaped buffer pad; Calculate the preload stress based on the area of ​​the outer loop-shaped buffer pad and the theoretical preload force; Obtain the stress-strain curve corresponding to the material information of the outer loop-shaped buffer pad; Based on the preload stress and the stress-strain curve, determine the material compressibility under the preload stress; The thickness of the outer loop-shaped buffer pad is calculated based on the material compression ratio and the design value of the spacing between the target cells.

6. The cell heat insulation pad design method according to any one of claims 1-5, wherein, The determination of the size data of the middle heat-insulating pad based on the size data of the outer loop-shaped buffer pad and the performance parameters includes: The width of the intermediate heat-insulating pad is determined based on the total width of the spiral frame and the width of the spiral border. The height of the intermediate heat-insulating pad is determined based on the total height of the loop frame and the width of the loop frame. Based on the results of the thermal diffusion test, the thickness of the intermediate heat-insulating pad is determined.

7. The cell heat insulation pad design method according to any one of claims 1-6, wherein, The step of verifying the size data of the heat insulation pad and generating corresponding verification results includes: Based on the thickness of the outer loop-shaped buffer pad, the design value of the spacing between the target chips, and the negative tolerance value of the target cell, the minimum actual preload of the outer loop-shaped buffer pad is calculated. Based on the thickness of the outer ring buffer pad, the design value of the spacing between target chips, and the positive tolerance value of the target cell, the maximum actual preload of the outer ring buffer pad is calculated. The verification is performed based on the minimum actual preload, the maximum actual preload, and the stress-strain curves corresponding to the outer loop frame buffer pad, and the corresponding verification results are generated.

8. The cell heat insulation pad design method according to any one of claims 1-7, wherein, After determining that the size data of the heat insulation pad does not meet the preset requirements based on the verification results, the step of adjusting the heat insulation pad between the target cells includes: If it is determined that the minimum actual preload is less than the stress corresponding to the minimum material compressibility in the stress-strain curve, and / or if it is determined that the maximum actual preload is greater than the stress corresponding to the maximum material compressibility in the stress-strain curve, then it is determined that the size data of the heat insulation pad does not meet the preset requirements. Adjust the thickness or material of the outer loop-shaped buffer pad; The adjusted outer ring-shaped buffer pad is re-checked until the size data of the heat insulation pad 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 the processor executes the program to implement the steps of the cell heat insulation pad design method as described in any one of claims 1-8.

10. A computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the steps of the cell heat insulation pad design method as described in any one of claims 1-8.

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