Battery pack impact testing methods, apparatus, equipment and storage media

Abstract

This invention provides a battery pack collision testing method, apparatus, electronic device, and storage medium, comprising: acquiring the initial specifications of a vehicle battery pack to be tested; constructing a battery pack undercarriage simulation model based on the initial specifications; performing a collision simulation on the battery pack undercarriage simulation model using preset simulation conditions to obtain the collision simulation results; adjusting the initial specifications of the battery pack; freezing the current specifications of the battery pack when the impact and stress conditions of the battery pack meet a first preset test condition; performing a physical test on the battery pack based on the current specifications to obtain the physical test results; adjusting the current specifications of the battery pack based on the physical test results; and determining the target specifications of the battery pack to meet a second preset test condition. This invention improves battery pack safety through a comprehensive analysis of the battery pack's connectors and components through simulation and physical testing.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a battery pack collision testing method, apparatus, equipment, and storage medium. Background Technology

[0002] With the increasing popularity of electric vehicles, the safety performance requirements for battery packs are becoming more and more stringent. The battery pack of an electric vehicle is usually located at the bottom of the vehicle. This design helps to lower the vehicle's center of gravity, improve handling stability, and make more efficient use of vehicle space. The bottom of the battery pack is an important part of the battery pack structure. It is easily affected by external impacts such as road obstacles, potholes, and stones, which can cause deformation of the bottom structure of the battery pack and damage to the cells inside the pack, thereby increasing the risk of battery pack damage.

[0003] Current battery pack simulation tests typically only use the battery pack or individual cells to assess the safety of the battery pack under the influence of scratches, lacking consideration of surrounding components and application scenarios. This results in incomplete simulation test factors and affects the accuracy of the simulation test results. Summary of the Invention

[0004] In view of this, the present invention aims to provide a battery pack collision test method, apparatus, electronic device and storage medium to solve the problem that the simulation test factors of the battery pack are not comprehensive, which affects the accuracy of the simulation test results of the battery pack.

[0005] According to a first aspect of the present invention, a battery pack collision test method is provided, the method comprising:

[0006] Obtain the initial specifications of the battery pack to be tested in the vehicle, and construct a battery pack bottom scraping simulation model based on the initial specifications of the battery pack.

[0007] The battery pack bottom-scraping simulation model was subjected to collision simulation using preset simulation conditions to obtain the collision simulation results of the battery pack; wherein, the collision simulation results include the impact of the battery pack connectors and the stress of the battery pack components;

[0008] Adjust the initial specifications of the battery pack, and freeze the current specifications of the battery pack if the impact and stress conditions of the battery pack meet the first preset test conditions.

[0009] Based on the current specifications of the battery pack, a physical test is conducted on the battery pack to obtain the physical test results of the battery pack.

[0010] Based on the actual test results, the current specifications of the battery pack are adjusted to determine the target specifications of the battery pack that meet the second preset test conditions.

[0011] Optionally, obtaining the initial specifications of the battery pack under test in the vehicle and constructing a battery pack undercut simulation model based on the initial specifications of the battery pack includes:

[0012] Obtain the initial specifications of the battery pack to be tested in the vehicle; wherein, the initial specifications include anti-collision structure parameters, battery pack structure parameters, and battery pack material parameters;

[0013] Based on the aforementioned anti-collision structure parameters, battery pack structure parameters, and battery pack material parameters, create a vehicle model and a battery pack model respectively;

[0014] The battery pack model is integrated into the vehicle model to obtain the battery pack bottom scraping simulation model.

[0015] Optionally, the step of performing a collision simulation on the battery pack bottom-scraping simulation model using preset simulation conditions to obtain the collision simulation results of the battery pack includes:

[0016] Determine the preset simulation conditions; wherein, the preset simulation conditions include the obstacle to be hit and the impact velocity;

[0017] Adjust the battery pack bottom scraping simulation model so that the connector port of the battery pack faces the obstacle to be hit, and the lowest point of the battery pack overlaps with the obstacle to be hit by a preset height;

[0018] The battery pack bottom-scraping simulation model is impacted with the barrier at the impact velocity to perform a collision simulation. The impact condition of the battery pack connector and the stress condition of the battery pack components are monitored to obtain the collision simulation results of the battery pack.

[0019] Optionally, adjusting the initial specifications of the battery pack, and freezing the current specifications of the battery pack when the impact and stress conditions of the battery pack meet the first preset test conditions, includes:

[0020] Based on the collision simulation results of the battery pack, determine whether the initial specifications of the battery pack meet the first preset test conditions;

[0021] If the stress of the battery pack connectors and components is less than the allowable stress, then the initial specifications of the battery pack meet the first preset test conditions.

[0022] Otherwise, adjust the initial specifications of the battery pack and freeze the current specifications of the battery pack that meet the first preset test conditions.

[0023] Optionally, the other step involves adjusting the initial specifications of the battery pack and freezing the current specifications of the battery pack that meet the first preset test conditions, including:

[0024] If the initial specifications of the battery pack do not meet the first preset test conditions, at least one of the initial specifications, namely the anti-collision structure parameters, the battery pack structure parameters, and the battery pack material parameters, shall be adjusted.

[0025] If the adjusted current specification parameters meet the first preset test conditions, the current specification parameters will be frozen.

[0026] Optionally, the step of conducting a physical test on the battery pack based on its current specifications to obtain the physical test results includes:

[0027] Based on the current specifications of the battery pack and the preset simulation conditions, create physical test conditions;

[0028] The battery pack was subjected to physical testing under the aforementioned testing conditions; the physical testing included crash testing and safety testing.

[0029] The test results of the crash test and the safety test are determined as the physical test results of the battery pack.

[0030] Optionally, adjusting the current specifications of the battery pack based on the physical test results to determine the target specifications of the battery pack that meet the second preset test conditions includes:

[0031] Based on the physical test results, determine whether the current specifications of the battery pack meet the second preset test conditions;

[0032] If the current specifications of the battery pack meet the second preset test conditions, the current specifications of the battery pack are determined to be the target specifications.

[0033] According to a second aspect of the present invention, a battery pack collision testing apparatus is provided, the apparatus comprising:

[0034] A model building module is used to obtain the initial specifications of the battery pack under test in the vehicle, and to build a battery pack scraping simulation model based on the initial specifications of the battery pack.

[0035] The collision simulation module is used to perform collision simulation on the battery pack bottom scraping simulation model using preset simulation conditions to obtain the collision simulation results of the battery pack; wherein, the collision simulation results include the impact of the battery pack connectors and the stress of the battery pack components;

[0036] The first parameter determination module is used to adjust the initial specification parameters of the battery pack, and freeze the current specification parameters of the battery pack when the impact and stress conditions of the battery pack meet the first preset test conditions.

[0037] The physical testing module is used to perform physical testing on the battery pack according to the current specifications of the battery pack, and obtain the physical testing results of the battery pack.

[0038] The second parameter determination module is used to adjust the current specification parameters of the battery pack based on the physical test results, and determine the target specification parameters of the battery pack to meet the second preset test conditions.

[0039] According to another aspect of the present invention, an electronic device is also provided, comprising:

[0040] processor;

[0041] Memory used to store the processor's executable instructions;

[0042] The processor is configured to execute the instructions to implement the battery pack collision test method described above.

[0043] According to another aspect of the present invention, a readable storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements the steps of the battery pack collision test method as described above.

[0044] The battery pack collision testing method provided in this invention involves acquiring the initial specifications of the battery pack under test in a vehicle, constructing a battery pack undercarriage scraping simulation model based on these initial specifications, conducting collision simulations on the model using preset simulation conditions to obtain the collision simulation results, adjusting the initial specifications, freezing the current specifications when the impact and stress conditions of the battery pack meet a first preset test condition, conducting physical tests on the battery pack based on these current specifications, obtaining the physical test results, and adjusting the current specifications based on the physical test results to determine the target specifications that meet a second preset test condition. This invention, by constructing a battery pack undercarriage scraping simulation model for both simulation and physical testing, comprehensively analyzes the stress conditions of the battery pack's connectors and components, verifies the accuracy of the simulation results through physical testing, optimizes the structural layout and material parameters, ensuring that both simulation and physical testing meet the requirements. The optimized battery pack specifications effectively prevent stress exceeding limits in connectors and components, ensuring the safety performance of the battery pack under undercarriage scraping conditions. By combining simulation and actual measurement analysis methods, weak points such as the end connectors of the battery pack are avoided from impact, ensuring that the stress or strain of each component and cell at the bottom does not exceed the allowable stress or strain, thereby improving the safety and reliability of the battery pack and achieving the goals of improving development progress, development quality and reducing development costs.

[0045] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0046] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0047] Figure 1 This is a flowchart of the steps of a battery pack collision test method provided in an embodiment of the present invention;

[0048] Figure 2 yes Figure 1 A flowchart of step 101 in the battery pack collision test method provided in this embodiment of the invention;

[0049] Figure 3 yes Figure 1 A flowchart of step 102 in the battery pack collision test method provided in this embodiment of the invention;

[0050] Figure 4 yes Figure 1 A flowchart of step 103 in the battery pack collision test method provided in this embodiment of the invention;

[0051] Figure 5 yes Figure 1 A flowchart of step 104 in the battery pack collision test method provided in this embodiment of the invention;

[0052] Figure 6 yes Figure 1 A flowchart of step 105 in the battery pack collision test method provided in this embodiment of the invention;

[0053] Figure 7 This is a schematic diagram of a battery pack collision test in a battery pack collision test method provided in an embodiment of the present invention;

[0054] Figure 8 This is a schematic diagram of an anti-collision structure in a battery pack collision test method provided in an embodiment of the present invention;

[0055] Figure 9 This is a schematic diagram of the battery pack structure in a battery pack collision test method provided in an embodiment of the present invention;

[0056] Figure 10This is a schematic diagram of simulation results in a battery pack collision test method provided in an embodiment of the present invention. Figure 1 ;

[0057] Figure 11 This is a schematic diagram of simulation results in a battery pack collision test method provided in an embodiment of the present invention. Figure 2 ;

[0058] Figure 12 This is a schematic diagram of simulation results in a battery pack collision test method provided in an embodiment of the present invention. Figure 3 ;

[0059] Figure 13 This is a schematic diagram of the structure of a battery pack collision testing device provided in an embodiment of the present invention;

[0060] Figure 14 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention.

[0061] Explanation of reference numerals in the attached figures:

[0062] 1-Complete vehicle model, 2-Battery pack, 3-Anti-collision structure, 4-Barrier, 5-Underbody protection plate, 6-Underbody protection plate sealing ring, 7-Cold plate rivet nut, 8-Buffer foam, 9-Lower flow channel plate, 10-Upper heat sink plate, 11-Liquid cooling plate sealing ring, 12-Thermal conductive structural adhesive, 13-Battery cell. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details are presented in the various embodiments of the present invention to facilitate a better understanding of this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments. The division of the various embodiments below is for ease of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined with and referenced by each other without contradiction.

[0064] Reference Figure 1 The flowchart illustrates the steps of a battery pack collision test method provided in an embodiment of the present invention, the method including:

[0065] Step 101: Obtain the initial specifications of the battery pack to be tested in the vehicle, and construct a battery pack undercut simulation model based on the initial specifications of the battery pack.

[0066] In this embodiment of the invention, to address the problem of incomplete simulation testing factors affecting the accuracy of battery pack simulation test results, this embodiment performs both simulation and actual testing on the battery pack. Based on the simulation and actual test results, it ensures that impacts are avoided on weak points such as the battery pack end connectors, and that the stress or strain of each component and cell at the bottom of the battery pack does not exceed the allowable stress or strain, thereby improving the bottom's impact resistance and better protecting the cells. Ultimately, both simulation and actual testing meet the requirements. By combining simulation and actual testing, the data that optimally protects the safety performance of the battery pack is frozen, forming a closed-loop vehicle-level battery pack bottom scraping safety test, thus achieving the goals of improving development progress, development quality, and reducing development costs.

[0067] Specifically, refer to Figure 7 This illustration shows a schematic diagram of a battery pack collision test method provided by an embodiment of the present invention. The method involves obtaining the initial specifications of the battery pack to be tested, constructing a battery pack bottom-scraping simulation model based on these initial specifications, and collecting the initial specifications of each component at the bottom of the battery pack through actual testing or querying design data. These initial specifications include anti-collision structure parameters, battery pack structure parameters, and battery pack material parameters. Specifically, these include the battery pack size, the number of battery modules contained within the battery pack, the size of individual battery cells, the type and thickness of the internal buffer material, the position, size, and material of the front and rear connectors of the battery pack, and the position, size, and material of the anti-collision structure.

[0068] It should be noted that the battery anti-collision structure serves as a warning at low speeds. At high speeds, obstacles directly cross the battery pack. Early models typically used a subframe as a simple battery pack anti-collision structure. However, the subframe sometimes cannot be lower than the battery pack, thus failing to provide protection. When an obstacle passes, only the subframe provides limited protection, causing the battery pack connectors to crack upon impact, ultimately leading to battery pack airtightness failure and risks such as water ingress and fire. In this embodiment, refer to... Figure 8 The diagram shows a schematic of the anti-collision structure in a battery pack collision test method provided by an embodiment of the present invention. A separate anti-collision structure is added at the subframe position. When the barrier passes, the anti-collision structure raises the entire vehicle, thereby avoiding direct impact on the battery pack insert. Furthermore, the anti-collision structure has an arc-shaped design added downward in the Z direction, which further raises the entire vehicle and reduces the possibility of impact on the battery pack.

[0069] Reference Figure 9This diagram illustrates a battery pack structure in a battery pack collision test method provided by an embodiment of the present invention. The vehicle battery pack under test in this embodiment includes a bottom protective plate, a bottom protective plate sealing ring, a cold plate rivet nut, cushioning foam, a lower flow channel plate, an upper heat dissipation plate, a liquid cooling plate sealing ring, thermally conductive structural adhesive, and battery cells. The bottom protective plate at the very bottom serves as the first layer of protection. In this embodiment, high-strength steel with high elongation at break is selected. The second layer is cushioning foam, and the third layer is a liquid cooling plate, which consists of a lower flow channel plate and an upper heat dissipation plate. Since aluminum alloy has relatively high rigidity and elongation at break... The presence of cushioning foam reduces the possibility of bottom impacts scratching the cold plate. The fourth layer is the thermally conductive structural adhesive at the bottom of the battery cell, which can resist bottom impacts to a certain extent. The battery cell is on top of the adhesive. The battery cell is the most protected object. Therefore, the bottom of the battery cell has a multi-layer protective structure design. With the effect of the front anti-collision structure, the whole vehicle is raised and the front of the battery pack is basically free from scratches. However, due to the relatively long battery pack, the rear still collides with the barrier, causing the bottom structural components of the battery pack and the battery cell to be deformed under pressure. The primary task of the battery pack bottom scratch simulation is to ensure the safety of the battery cell and prevent serious failures such as leakage.

[0070] Step 102: Perform a collision simulation on the battery pack bottom-scraping simulation model using preset simulation conditions to obtain the collision simulation results of the battery pack; wherein, the collision simulation results include the impact of the battery pack connectors and the stress of the battery pack components.

[0071] In this embodiment of the invention, after constructing the battery pack scraping simulation model, a collision simulation is performed on the battery pack scraping simulation model using preset simulation conditions. The preset simulation conditions include battery charge, vehicle weight, impact speed, and the obstacle to be hit. For example, this embodiment uses the conditions set in Appendix N of 2024 C-NCAP as an example for illustration. The preset simulation conditions are that the battery is fully charged, the vehicle's curb weight plus the front row weight of two 80kg dummies, and the vehicle hits a 150mm diameter hemispherical steel obstacle at a speed of 30km / h to 31km / h. The obstacle's Y-axis position is directly opposite the battery pack connector port and overlaps with the lowest point of the battery pack in the Z-axis direction by 30mm to 34mm.

[0072] In this embodiment, with the help of the anti-collision structure, the entire vehicle is raised and the front end of the battery pack is basically free from scratches. However, due to the relatively long battery pack, the rear end still collides with the barrier, causing the bottom structural components and cells of the battery pack to be deformed under pressure. In this embodiment, the primary task of constructing the battery pack bottom scratch simulation model is to ensure the safety of the cells and prevent serious failures such as leakage.

[0073] Step 103: Adjust the initial specifications of the battery pack. If the impact and stress conditions of the battery pack meet the first preset test conditions, freeze the current specifications of the battery pack.

[0074] In this embodiment of the invention, based on the collision simulation results of the battery pack, it is determined whether the initial specifications of the battery pack meet the first preset test conditions. The first preset test conditions include whether the stress of the battery pack connectors and components is less than the allowable stress. If the stress of the battery pack connectors and components is less than the allowable stress, then the initial specifications of the battery pack meet the first preset test conditions. Otherwise, the initial specifications of the battery pack are adjusted, and the current specifications of the battery pack that meet the first preset test conditions are frozen.

[0075] Step 104: Based on the current specifications of the battery pack, conduct a physical test on the battery pack to obtain the physical test results.

[0076] In this embodiment of the invention, a physical test condition is created based on the current specifications of the battery pack and preset simulation conditions, and the battery pack is tested in the physical test condition. The physical test includes a collision test and a safety test, and the test results of the collision test and the safety test are determined as the physical test results of the battery pack.

[0077] Specifically, the specifications frozen in the simulation are verified by testing under actual test conditions. The collision test specifically checks the stress, strain, and deformation of the battery pack connectors and bottom components to determine whether they meet the relevant standards and requirements. The safety test specifically checks the insulation resistance and waterproof performance of the battery pack to determine whether they meet the relevant standards and requirements. If any items are not met in the test, the structural layout and material parameters are optimized based on the failure phenomena to ensure that both simulation and actual tests meet the requirements. Through the analysis method that combines simulation and actual testing, the optimal data freezing and actual test plan are guided. The actual test results calibrate the simulation accuracy, forming a closed-loop vehicle-level battery pack scraping design verification method, ultimately achieving the goal of improving development progress, development quality, and reducing development costs.

[0078] Step 105: Adjust the current specifications of the battery pack based on the actual test results to determine the target specifications of the battery pack that meet the second preset test conditions.

[0079] In this embodiment of the invention, after the physical testing of the battery pack is completed, the performance of the battery pack in the collision test and safety test is determined based on the test results to see if it meets the relevant standards and requirements. Specifically, the stress, strain, and deformation of the battery pack connectors and bottom components are checked to determine if they meet the relevant standards and requirements. The insulation resistance and waterproof performance of the battery pack are also checked to determine if they meet the relevant standards and requirements. If the stress, strain, and deformation of the battery pack connectors and bottom components all meet the relevant standards and requirements, then the current specifications of the battery pack are determined to be the target specifications.

[0080] The battery pack collision testing method provided in this invention involves acquiring the initial specifications of the battery pack under test in a vehicle, constructing a battery pack undercarriage scraping simulation model based on these initial specifications, conducting collision simulations on the model using preset simulation conditions to obtain the collision simulation results, adjusting the initial specifications, freezing the current specifications when the impact and stress conditions of the battery pack meet a first preset test condition, conducting physical tests on the battery pack based on these current specifications, obtaining the physical test results, and adjusting the current specifications based on the physical test results to determine the target specifications that meet a second preset test condition. This invention, by constructing a battery pack undercarriage scraping simulation model for both simulation and physical testing, comprehensively analyzes the stress conditions of the battery pack's connectors and components, verifies the accuracy of the simulation results through physical testing, optimizes the structural layout and material parameters, ensuring that both simulation and physical testing meet the requirements. The optimized battery pack specifications effectively prevent stress exceeding limits in connectors and components, ensuring the safety performance of the battery pack under undercarriage scraping conditions. By combining simulation and actual measurement analysis methods, weak points such as the end connectors of the battery pack are avoided from impact, ensuring that the stress or strain of each component and cell at the bottom does not exceed the allowable stress or strain, thereby improving the safety and reliability of the battery pack and achieving the goals of improving development progress, development quality and reducing development costs.

[0081] Furthermore, refer to Figure 2 , showed Figure 1 A flowchart of step 101 in a battery pack collision test method is provided. This method is basically the same as the battery pack collision test method provided in the first embodiment of the present invention. Step 101 may include:

[0082] Step 1011: Obtain the initial specifications of the battery pack to be tested in the vehicle; wherein, the initial specifications include anti-collision structure parameters, battery pack structure parameters, and battery pack material parameters.

[0083] Step 1012: Create a vehicle model and a battery pack model based on the anti-collision structure parameters, battery pack structure parameters, and battery pack material parameters, respectively.

[0084] Step 1013: Integrate the battery pack model into the vehicle model to obtain the battery pack undercarriage simulation model.

[0085] It should be noted that this embodiment obtains the initial specifications of the battery pack under test in the vehicle. The initial specifications include anti-collision structure parameters, battery pack structure parameters, and battery pack material parameters. Based on the anti-collision structure parameters, an anti-collision structure of the whole vehicle model is created. Based on the battery pack structure parameters and material parameters, a geometric model of the battery pack is created, including cells, buffer materials, cooling system, connectors, etc. The whole vehicle model and battery pack model are imported into the simulation software. In some embodiments, CAE simulation software can be used to perform structural mechanics, collision simulation, and material nonlinear analysis. The material properties of each component can be defined in the simulation software according to the battery pack material parameters.

[0086] This invention significantly improves design efficiency by obtaining the initial specifications of the battery pack to be tested in a vehicle and constructing a battery pack simulation model based on the parameters. The simulation model can quickly evaluate the performance of battery packs with different design schemes, thereby shortening the development cycle.

[0087] Furthermore, refer to Figure 3 , showed Figure 1 A flowchart of step 102 in a battery pack collision test method is provided. This method is basically the same as the battery pack collision test method provided in the first embodiment of the present invention. Step 102 may include:

[0088] Step 1021: Determine the preset simulation conditions; wherein, the preset simulation conditions include the obstacle to be collided with and the impact velocity;

[0089] Step 1022: Adjust the battery pack bottom scraping simulation model so that the connector of the battery pack faces the obstacle to be hit, and the lowest point of the battery pack overlaps with the obstacle to be hit by a preset height.

[0090] Step 1023: The battery pack bottom-scraping simulation model is impacted with the barrier at the impact velocity to conduct a collision simulation, and the impact of the battery pack connectors and the stress of the battery pack components are monitored to obtain the collision simulation results of the battery pack.

[0091] It should be noted that before conducting the battery pack bottom scraping simulation, the preset simulation conditions need to be determined first. The preset simulation conditions include the obstacle to be hit and the impact speed. The obstacle to be hit can be a hemispherical steel obstacle with a diameter of 150mm. In this embodiment, the impact speed is set to the vehicle hitting the obstacle at a speed of 30km / h-31km / h. In actual simulation, the simulation conditions can be set according to the vehicle and battery pack specifications, and are not specifically limited here. In this embodiment, the preset simulation conditions include the obstacle to be hit and the impact speed. Specifically, this embodiment uses the conditions set in Appendix N of 2024 C-NCAP as an example. During the simulation, the battery is set to be fully charged, and the vehicle's curb weight plus the front row weight of two 80kg dummies is set. The battery pack scraping simulation model is adjusted so that the connector of the battery pack is directly facing the obstacle to be hit, and the lowest point of the battery pack overlaps with the obstacle to be hit by a preset height. The battery pack scraping simulation model is then used to impact the obstacle to be hit at the impact speed to simulate the collision. The vehicle impacts a 150mm diameter hemispherical steel obstacle at a speed of 30km / h to 31km / h. The Y-axis position of the obstacle is directly facing the connector of the battery pack and overlaps with the lowest point of the battery pack in the Z-axis direction by 30mm to 34mm.

[0092] Specifically, adjust the battery pack bottom-scraping simulation model so that the battery pack connector is facing the obstacle to be impacted, and the lowest point of the battery pack overlaps with the obstacle to be impacted by a preset height. Adjust the positions of the front and rear connectors of the battery pack to ensure that the connectors are facing the obstacle to be impacted. Adjust the position of the battery pack so that its lowest point overlaps with the obstacle to be impacted by a preset height (e.g., 30mm-34mm). Ensure that the lowest point of the battery pack overlaps with the Z-axis position of the obstacle to be impacted. The geometric positions of the battery pack connectors and the lowest point can be checked in the simulation software to ensure that the adjusted positions meet the preset working conditions.

[0093] In this embodiment, a battery pack bottom-scraping simulation model is subjected to a collision simulation by impacting a barrier at the required velocity. The impact condition of the battery pack connector and the stress on the battery pack components are monitored to obtain the collision simulation results. Specifically, during the simulation, the battery pack bottom-scraping simulation model is placed under the simulation conditions. The initial vehicle speed is 30km / h-31km / h, the battery pack is fully charged, and two 80kg dummies are placed as front-row counterweights. The Y-axis position of the barrier is aligned with the battery pack connector opening, and the Z-axis overlaps with the lowest point of the battery pack by 30mm-34mm. The desired output results, such as stress, strain, and deformation, are set. The simulation model is run to perform numerical calculations. During the simulation, the calculation progress and results are monitored to ensure the stability and accuracy of the simulation process. The stress on the battery pack connector during the impact process is monitored to determine whether it has been impacted. The stress on the battery pack components is also monitored to analyze the stress distribution and strain of the components and cells at the bottom of the battery pack, and to determine whether the allowable stress or strain requirements are met.

[0094] This invention uses collision simulation to comprehensively analyze the impact of battery pack connectors and the stress on battery pack components, thereby improving the accuracy of battery pack bottom scraping simulation results.

[0095] Furthermore, refer to Figure 4 , showed Figure 1 A flowchart of step 103 in a battery pack collision test method is provided. This method is basically the same as the battery pack collision test method provided in the first embodiment of the present invention. Step 103 may include:

[0096] Step 1031: Based on the collision simulation results of the battery pack, determine whether the initial specifications of the battery pack meet the first preset test conditions.

[0097] Step 1032: If the stress of the battery pack connectors and components is less than the allowable stress, then the initial specifications of the battery pack meet the first preset test conditions.

[0098] Step 1033, otherwise, adjust the initial specifications of the battery pack and freeze the current specifications of the battery pack that meet the first preset test conditions.

[0099] It should be noted that after performing the battery pack bottom-scraping simulation, it is necessary to determine whether the initial specifications of the battery pack meet the first preset test conditions based on the simulation results. The first preset test conditions include whether the stress of the battery pack connectors and components is less than the allowable stress. Specifically, it involves determining whether the stress distribution, strain distribution, and deformation of the battery pack connectors and bottom components are less than the allowable stress. If the stress is less than the allowable stress, then the initial specifications of the battery pack meet the first preset test conditions. The allowable stress refers to the maximum stress value that a material can withstand under normal operating conditions. It is calculated based on the material's mechanical properties and design requirements using a certain safety factor. The allowable stress is used to ensure that the material will not be damaged or fail during actual use, thereby ensuring the safety and reliability of the structure. This embodiment does not specifically limit the specific values ​​of the allowable stress for the battery pack connectors and components.

[0100] Specifically, if the stress of the battery pack connectors and components is less than the allowable stress, the initial specifications of the battery pack meet the first preset test conditions. Otherwise, the initial specifications of the battery pack under test are adjusted, and the current specifications of the battery pack that meet the first preset test conditions are frozen. If the stress of the battery pack connectors and components is less than the allowable stress, the initial specifications of the battery pack are considered to meet the first preset test conditions. Otherwise, the initial specifications of the battery pack are adjusted until they meet the first preset test conditions, and the current specifications are frozen.

[0101] Through simulation analysis, this invention can avoid impacting weak points such as the end connectors of the battery pack, and ensure that the stress or strain of each component and cell at the bottom does not exceed the allowable stress or strain, thereby improving the safety and reliability of the battery pack.

[0102] Specifically, step 1033, otherwise, adjust the initial specifications of the battery pack under test, and freeze the current specifications of the battery pack that meet the first preset test conditions. This may specifically include the following steps:

[0103] First, if the initial specifications of the battery pack do not meet the first preset test conditions, at least one of the following parameters in the initial specifications—the anti-collision structure parameter, the battery pack structure parameter, and the battery pack material parameter—must be adjusted.

[0104] Secondly, if the adjusted current specifications meet the first preset test conditions, the current specifications will be frozen.

[0105] It should be noted that in the above steps, if the initial specifications of the battery pack do not meet the first preset test conditions, at least one of the following parameters in the initial specifications—the anti-collision structure parameters, the battery pack structure parameters, and the battery pack material parameters—is adjusted. If the stress of the battery pack connector is greater than the allowable stress, the connector is considered not to meet the first preset test conditions. If the stress of each component at the bottom of the battery pack is greater than the allowable stress, the component is considered not to meet the first preset test conditions. If the stress of both the battery pack connector and the component is greater than the allowable stress, the initial specifications of the battery pack are considered not to meet the first preset test conditions. The initial specifications are then adjusted; specifically, the thickness of key components can be increased, the shape of components can be optimized, or the material selection can be optimized to improve the stress resistance of the battery pack. The specifications that meet the first preset test conditions are then frozen. After optimizing the structural design and material selection, the simulation model is rerun to verify whether the optimized design meets the first preset test conditions. If the optimized design meets the first preset test conditions, the current specifications are frozen as the final design parameters.

[0106] For example, if the initial specifications of the battery pack do not meet the first preset test conditions, at least one of the following parameters should be adjusted: the anti-collision structure parameter, the battery pack structure parameter, and the battery pack material parameter. If the bottom protection plate material is changed, for example, replacing the 0.8mm thick HC950 / 1300HS material with the 1mm thick HC340 / 590DP material, which has a higher elongation at break and lower yield and tensile strength, simulation analysis shows that the lower stiffness of the bottom protection plate results in greater strain, thus reducing the impact on the liquid cooling plate and the battery cell. If the wall thickness of the liquid cooling plate is increased (from 1.2mm to 1.7mm), comparative analysis shows that the increased thickness of the liquid cooling plate strengthens the protection at the bottom of the battery cell, ultimately reducing the impact on the battery cell.

[0107] Furthermore, refer to Figure 5 , showed Figure 1 A flowchart of step 104 in a battery pack collision test method is provided. This method is basically the same as the battery pack collision test method provided in the first embodiment of the present invention. Step 104 may include:

[0108] Step 1041: Create physical test conditions based on the current specifications of the battery pack and the preset simulation conditions.

[0109] Step 1042: Conduct physical testing on the battery pack under actual testing conditions; the physical testing includes crash testing and safety testing.

[0110] Step 1043: Determine the test results of the crash test and safety test as the physical test results of the battery pack.

[0111] It should be noted that in the above steps, a physical test condition is created based on the current specifications of the battery pack and the preset simulation conditions. After completing the simulation analysis of the battery pack and freezing the specifications that meet the first preset test conditions, a physical test condition is created based on the current specifications of the battery pack and the preset simulation conditions, and the battery pack is tested in the physical test condition.

[0112] Specifically, the impact test bench is activated, and the vehicle impacts a barrier at a predetermined speed. The vehicle impacts a 150mm diameter hemispherical steel barrier at a speed of 30km / h-31km / h to conduct the collision test. Data such as stress, strain, deformation, and energy absorption during the impact process are recorded. Safety tests are also conducted on the battery pack, including measuring the insulation resistance to ensure it meets insulation requirements, and performing a water immersion test by placing the battery pack in water to observe whether it catches fire and ensure that water does not enter the battery pack. The results of the collision test and safety test are used as the physical test results for the battery pack. The collision test results include the stress distribution of the battery pack connectors and bottom components during the collision test, as well as the deformation of the battery pack connectors and bottom components.

[0113] For example, in accordance with the requirements of Appendix N of 2024 C-NCAP, if the plastic strain of the battery cell does not exceed the allowable strain (the battery cell does not break), the bottom protective plate of the battery pack is properly sealed, and water does not penetrate into the battery cell compartment during the immersion test, it can be determined that the battery pack insulation is normal. There is no risk of fire or explosion within 30 minutes after the collision ends. There is no risk of fire or explosion within 2 hours after the immersion test and the battery pack is left to stand in the water. The current specification parameters obtained from the simulation are verified. After the test is passed, the product design plan is frozen.

[0114] The embodiments of the present invention, through physical testing, can avoid impacting weak points such as the end connectors of the battery pack, and ensure that the stress or strain of each component and cell at the bottom does not exceed the allowable stress or strain, thereby improving the safety and reliability of the battery pack, and ultimately achieving the requirement that both simulation and actual testing meet the requirements.

[0115] Furthermore, refer to Figure 6 , showed Figure 1 A flowchart of step 105 in a battery pack collision test method is provided. This method is basically the same as the battery pack collision test method provided in the first embodiment of the present invention. Step 105 may include:

[0116] Step 1051: Based on the physical test results, determine whether the current specifications of the battery pack meet the second preset test conditions.

[0117] Step 1052: If the current specifications of the battery pack meet the second preset test conditions, determine the current specifications of the battery pack as the target specifications.

[0118] It should be noted that, in this embodiment of the invention, after completing the physical testing of the battery pack, the current specifications of the battery pack are determined based on the test results to see if they meet the second preset test conditions. The second preset test conditions typically include whether the battery pack's performance in collision and safety tests meets relevant standards and requirements. Specifically, the stress, strain, and deformation of the battery pack connectors and bottom components are checked to determine if they meet relevant standards and requirements. The insulation resistance and waterproof performance of the battery pack are also checked to determine if they meet relevant standards and requirements. If the stress, strain, and deformation of the battery pack connectors and bottom components all meet relevant standards and requirements, the collision test is considered to meet the second preset test conditions. If the insulation resistance and waterproof performance of the battery pack both meet relevant standards and requirements, the safety test is considered to meet the second preset test conditions. If the current specifications of the battery pack meet the second preset test conditions in both the collision and safety tests, then the current specifications of the battery pack are determined to be the target specifications.

[0119] Reference Figure 10 , Figure 11 as well as Figure 12This diagram illustrates the simulation results of a battery pack collision test method provided by an embodiment of the present invention. Based on the residual deformation and plastic strain of the battery cells, if the residual deformation and plastic strain of the battery cells do not exceed the allowable strain (threshold), the safety requirements are met. The bottom protective plate, as the first layer of structural protection, also serves a sealing function. A simulated stress analysis was performed on the bottom protective plate. Particular attention needs to be paid to whether the sealing structure of the bottom protective plate is damaged. If the bottom protective plate seal fails, and the bolts at the bottom of the battery pack may be bent during scraping, water may seep into the battery cell compartment from the bolt locations during the battery pack immersion test, causing short circuits and other faults. The upper and lower liquid cooling plates... A separate simulation stress analysis was conducted. The strain of the lower cold plate exceeded the allowable strain (threshold), while the strain of the upper cold plate did not exceed the allowable strain. If the bottom protective plate seal fails (including cracking of the main body or the sealing ring), and both the upper and lower cold plates crack (exceeding the allowable strain), water will seep into the cell compartment during the immersion test. If the bottom protective plate seal fails but the upper cold plate does not crack, water will not seep into the cell compartment during the immersion test. If the bottom protective plate seal does not fail but both the upper and lower cold plates crack, water will not seep into the cell compartment during the immersion test. In addition, it should be noted that, under the condition of meeting the test requirements, the lowest cost or lighter weight solution can be selected for data freezing.

[0120] This invention embodiment ensures the safety performance of the battery pack under specific operating conditions through vehicle-level scraping design verification. Based on simulation results, the structural layout and material parameters are optimized to ultimately achieve the effect that both simulation and actual measurement meet the requirements.

[0121] Reference Figure 13 The diagram shows a structural schematic of a battery pack collision testing device provided in an embodiment of the present invention. The device includes:

[0122] Model building module 201 is used to obtain the initial specification parameters of the battery pack to be tested in the vehicle, and to build a battery pack scraping simulation model based on the initial specification parameters of the battery pack.

[0123] The collision simulation module 202 is used to perform collision simulation on the battery pack bottom scraping simulation model using preset simulation conditions to obtain the collision simulation results of the battery pack; wherein, the collision simulation results include the impact of the battery pack connectors and the stress of the battery pack components;

[0124] The first parameter determination module 203 is used to adjust the initial specification parameters of the battery pack, and freeze the current specification parameters of the battery pack when the impact and stress conditions of the battery pack meet the first preset test conditions.

[0125] The physical testing module 204 is used to perform physical testing on the battery pack according to the current specifications of the battery pack, and obtain the physical testing results of the battery pack.

[0126] The second parameter determination module 205 is used to adjust the current specification parameters of the battery pack based on the physical test results, and determine the target specification parameters of the battery pack to meet the second preset test conditions.

[0127] Furthermore, the model construction module 201 includes:

[0128] The acquisition submodule is used to acquire the initial specifications of the battery pack to be tested in the vehicle; wherein, the initial specifications include anti-collision structure parameters, battery pack structure parameters, and battery pack material parameters;

[0129] Create a submodule to create a vehicle model and a battery pack model based on the anti-collision structure parameters, battery pack structure parameters, and battery pack material parameters, respectively.

[0130] An integration submodule is used to integrate the battery pack model into the vehicle model to obtain a battery pack bottom-scraping simulation model.

[0131] Furthermore, the collision simulation module 202 includes:

[0132] The first determining submodule is used to determine the preset simulation conditions; wherein, the preset simulation conditions include the obstacle to be hit and the impact speed;

[0133] The adjustment submodule is used to adjust the battery pack bottom scraping simulation model so that the connector port of the battery pack is facing the obstacle to be hit, and the lowest point of the battery pack overlaps with the obstacle to be hit by a preset height.

[0134] The simulation submodule is used to simulate the impact of the battery pack bottom-scraping simulation model onto the barrier at the impact speed, monitor the impact of the battery pack connectors and the stress on the battery pack components, and obtain the collision simulation results of the battery pack.

[0135] Furthermore, the first parameter determination module 203 includes:

[0136] The simulation judgment submodule is used to determine whether the initial specification parameters of the battery pack meet the first preset test conditions based on the collision simulation results of the battery pack.

[0137] The test submodule is used to ensure that if the stress of the battery pack connectors and components is less than the allowable stress, the initial specifications of the battery pack meet the first preset test conditions.

[0138] The parameter processing submodule is used to adjust the initial specification parameters of the battery pack if otherwise, and freeze the current specification parameters of the battery pack that meet the first preset test conditions.

[0139] Furthermore, the parameter processing submodule includes:

[0140] The parameter adjustment unit is used to adjust at least one of the anti-collision structure parameters, battery pack structure parameters, and battery pack material parameters in the initial specification parameters if the initial specification parameters of the battery pack do not meet the first preset test conditions.

[0141] The parameter freezing unit is used to freeze the current specification parameters when the adjusted current specification parameters meet the first preset test conditions.

[0142] Furthermore, the physical testing module 204 includes:

[0143] The second determining submodule is used to create physical test conditions based on the current specifications of the battery pack and the preset simulation conditions.

[0144] The actual testing submodule is used to conduct actual tests on the battery pack under the actual testing conditions; the actual tests include collision tests and safety tests;

[0145] The third determining submodule is used to determine the test results of the collision test and the safety test as the physical test results of the battery pack.

[0146] Furthermore, the second parameter determination module 205 includes:

[0147] The actual test judgment submodule is used to determine whether the current specification parameters of the battery pack meet the second preset test conditions based on the actual test results.

[0148] The parameter determination submodule is used to determine the current specification parameters of the battery pack as the target specification parameters if the current specification parameters of the battery pack meet the second preset test conditions.

[0149] The battery pack collision testing device provided in this invention obtains the initial specifications of the battery pack under test in a vehicle, constructs a battery pack scraping simulation model based on the initial specifications, performs collision simulation on the battery pack scraping simulation model using preset simulation conditions, obtains the collision simulation results, adjusts the initial specifications of the battery pack, and freezes the current specifications of the battery pack when the impact and stress conditions of the battery pack meet the first preset test conditions. Based on the current specifications, a physical test is performed on the battery pack to obtain the physical test results. The current specifications of the battery pack are then adjusted based on the physical test results to determine the target specifications of the battery pack that meet the second preset test conditions. This invention, by constructing a battery pack scraping simulation model for simulation and physical testing, comprehensively analyzes the stress conditions of the battery pack's connectors and components, verifies the accuracy of the simulation results by combining physical testing, optimizes the structural layout and material parameters, and ensures that both simulation and actual testing meet the requirements. The optimized battery pack specifications effectively prevent stress exceeding the limits of connectors and components, ensuring the safety performance of the battery pack under scraping conditions. By combining simulation and actual measurement analysis methods, weak points such as the end connectors of the battery pack are avoided from impact, ensuring that the stress or strain of each component and cell at the bottom does not exceed the allowable stress or strain, thereby improving the safety and reliability of the battery pack and achieving the goals of improving development progress, development quality and reducing development costs.

[0150] Reference Figure 14 The present invention also provides an electronic device, such as... Figure 14 As shown, it includes a processor 301, a communication interface 302, a memory 303, and a communication bus 304, wherein the processor 301, the communication interface 302, and the memory 303 communicate with each other through the communication bus 304.

[0151] Processor 301, memory 303 for storing processor-executable instructions;

[0152] The processor 301 is configured to execute the instructions to implement the battery pack collision test method described above:

[0153] Obtain the initial specifications of the battery pack to be tested in the vehicle, and construct a battery pack bottom scraping simulation model based on the initial specifications of the battery pack.

[0154] The battery pack bottom-scraping simulation model was subjected to collision simulation using preset simulation conditions to obtain the collision simulation results of the battery pack; wherein, the collision simulation results include the impact of the battery pack connectors and the stress of the battery pack components;

[0155] Adjust the initial specifications of the battery pack, and freeze the current specifications of the battery pack if the impact and stress conditions of the battery pack meet the first preset test conditions.

[0156] Based on the current specifications of the battery pack, a physical test is conducted on the battery pack to obtain the physical test results of the battery pack.

[0157] Based on the actual test results, the current specifications of the battery pack are adjusted to determine the target specifications of the battery pack that meet the second preset test conditions.

[0158] The communication bus mentioned above can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not mean that there is only one bus or one type of bus.

[0159] The communication interface is used for communication between the aforementioned terminal and other devices.

[0160] The memory may include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0161] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0162] In another embodiment of the present invention, a computer-readable storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements the battery pack collision test method described in any of the above embodiments.

[0163] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk (SSD)).

[0164] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0165] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0166] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A battery pack collision test method, characterized in that, The method includes: Obtain the initial specifications of the battery pack to be tested in the vehicle, and construct a battery pack undercarriage scraping simulation model based on the initial specifications of the battery pack. This includes: obtaining the initial specifications of the battery pack to be tested in the vehicle, wherein the initial specifications include anti-collision structure parameters, battery pack structure parameters, and battery pack material parameters; creating a whole vehicle model and a battery pack model based on the anti-collision structure parameters, battery pack structure parameters, and battery pack material parameters respectively; and integrating the battery pack model into the whole vehicle model to obtain the battery pack undercarriage scraping simulation model. The battery pack bottom-scraping simulation model is subjected to collision simulation using preset simulation conditions to obtain the collision simulation results of the battery pack. The process includes: determining preset simulation conditions, wherein the preset simulation conditions include a barrier to be collided with and an impact velocity; adjusting the battery pack bottom-scraping simulation model so that the connector of the battery pack faces the barrier to be collided with, and the lowest point of the battery pack overlaps with the barrier to be collided with a preset height; simulating the collision of the battery pack bottom-scraping simulation model with the barrier to be collided with the barrier to be collided with the impact velocity; monitoring the impact of the battery pack connector and the force on the battery pack components to obtain the collision simulation results of the battery pack. Adjust the initial specifications of the battery pack. If the stress of the battery pack connectors and components is less than the allowable stress, then the initial specifications of the battery pack meet the first preset test conditions, and the current specifications of the battery pack are frozen. Based on the current specifications of the battery pack, a physical test is conducted on the battery pack to obtain the physical test results; the physical test includes a collision test and a safety test. Based on the actual test results, the current specifications of the battery pack are adjusted to determine the target specifications of the battery pack that meet the second preset test conditions.

2. The method according to claim 1, characterized in that, The adjustment of the initial specifications of the battery pack, and freezing the current specifications of the battery pack when the impact and stress conditions of the battery pack meet the first preset test conditions, includes: Based on the collision simulation results of the battery pack, determine whether the initial specifications of the battery pack meet the first preset test conditions; If the stress of the battery pack connectors and components is less than the allowable stress, then the initial specifications of the battery pack meet the first preset test conditions. Otherwise, adjust the initial specifications of the battery pack and freeze the current specifications of the battery pack that meet the first preset test conditions.

3. The method according to claim 1, characterized in that, Otherwise, the initial specifications of the battery pack are adjusted, and the current specifications of the battery pack that meet the first preset test conditions are frozen, including: If the initial specifications of the battery pack do not meet the first preset test conditions, at least one of the initial specifications, namely the anti-collision structure parameters, the battery pack structure parameters, and the battery pack material parameters, shall be adjusted. If the adjusted current specification parameters meet the first preset test conditions, the current specification parameters will be frozen.

4. The method according to claim 1, characterized in that, The battery pack is subjected to physical testing based on its current specifications to obtain the test results. The physical testing includes crash testing and safety testing, including: Based on the current specifications of the battery pack and the preset simulation conditions, create physical test conditions; The battery pack was subjected to physical testing under the stated physical testing conditions; The test results of the crash test and the safety test are determined as the physical test results of the battery pack.

5. The method according to claim 1, characterized in that, The step of adjusting the current specifications of the battery pack based on the physical test results to determine the target specifications of the battery pack that meet the second preset test conditions includes: Based on the physical test results, determine whether the current specifications of the battery pack meet the second preset test conditions; If the current specifications of the battery pack meet the second preset test conditions, the current specifications of the battery pack are determined to be the target specifications.

6. A battery pack collision testing device, characterized in that, The battery pack collision test method according to any one of claims 1 to 5, wherein the apparatus comprises: A model building module is used to obtain the initial specifications of the battery pack under test in the vehicle, and to build a battery pack scraping simulation model based on the initial specifications of the battery pack. The collision simulation module is used to perform collision simulation on the battery pack bottom scraping simulation model using preset simulation conditions to obtain the collision simulation results of the battery pack; wherein, the collision simulation results include the impact of the battery pack connectors and the stress of the battery pack components; The first parameter determination module is used to adjust the initial specification parameters of the battery pack, and freeze the current specification parameters of the battery pack when the impact and stress conditions of the battery pack meet the first preset test conditions. The physical testing module is used to perform physical testing on the battery pack according to the current specifications of the battery pack, and obtain the physical testing results of the battery pack. The second parameter determination module is used to adjust the current specification parameters of the battery pack based on the physical test results, and determine the target specification parameters of the battery pack to meet the second preset test conditions.

7. An electronic device, characterized in that, include: processor; Memory used to store processor-executable instructions; The processor is configured to execute the instructions to implement the battery pack collision test method as described in any one of claims 1 to 5.

8. A readable storage medium, characterized in that, A computer program is stored on the readable storage medium, which, when executed by a processor, implements the battery pack collision test method as described in any one of claims 1 to 5.

Images