Battery pack structure safety verification method, related device and storage medium

Abstract

The invention discloses a battery pack structure safety verification method, a related device and a storage medium. The method comprises the following steps: constructing a simulation model of a target battery pack; wherein the simulation model comprises a box body main body structure system model, a battery cell system model, an electrical system model and a thermal management system model of the target battery pack; simulating each target simulation item by using the simulation model of the current target battery pack to obtain a current simulation result corresponding to each target simulation item; wherein the target simulation items comprise modal simulation, random vibration simulation, bottom ball strike simulation, battery cell expansion cycle life simulation and bonding performance simulation; judging whether the current simulation result corresponding to each target simulation item is qualified or not; and if the current simulation result corresponding to any target simulation item is unqualified, optimizing the simulation model of the current target battery pack, returning to perform simulation again, and ending the simulation until the current simulation results corresponding to the target simulation items are qualified.

Description

Technical Field

[0001] The present application relates to the technical field of power battery development, and in particular to a battery pack structure safety verification method and related devices and storage media. Background Art

[0002] As new energy vehicles continue to account for an increasing share of the entire automobile market, the structural safety of vehicle power batteries has become more and more of a focus of attention. There are many factors that affect the safety of power batteries, such as impact, vibration, and expansion, so the structural safety of power batteries is also very complex.

[0003] At present, in order to ensure the structural safety of power batteries, the power batteries are mainly developed and designed based on past experience. Then, physical samples of power battery packs are made according to the current design scheme, and the physical samples of power battery packs are used to conduct safety tests on the designated structures of the power batteries. The design parameters are adjusted according to the test results until the power battery pack passes the safety test.

[0004] However, during the design and development stage of power batteries, the design has not been finalized and the design plan is not necessarily accurate, so it may not be possible to produce the corresponding samples, and thus it is impossible to conduct tests, and the design plan can only be adjusted continuously. In addition, the production of samples is not only costly, but also complicated, and it is difficult to ensure accuracy. In addition, the current tests are not comprehensive enough, so the current method not only makes the development efficiency of power batteries low, but also makes it difficult to ensure the structural safety of power battery packs. Summary of the invention

[0005] Based on the above-mentioned deficiencies of the prior art, the present application provides a battery pack structural safety verification method and related devices and storage media to solve the problem that the prior art is low in efficiency and cannot ensure structural safety.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] The first aspect of the present application provides a battery pack structure safety verification method, comprising:

[0008] S101, performing mechanical modeling on a target battery pack to obtain a simulation model of the target battery pack; wherein the simulation model of the target battery pack includes a box body structure system model, a cell system model, an electrical system model, and a thermal management system model of the target battery pack;

[0009] S102. For each target simulation item, respectively, use the current simulation model of the target battery pack to simulate the target simulation item to obtain the current simulation result corresponding to the target simulation item; wherein, the target simulation items include modal simulation, random vibration simulation, bottom ball impact simulation, battery cell expansion cycle life simulation, and bonding performance simulation; the modal simulation is performed using the simulation result of the target prestress as the initial physical field boundary condition of the modal simulation; the target prestress is the reaction compression force on the large surface of the battery cell generated after the battery pack box frame structure is squeezed by the expansion force of the battery cell module; the random vibration simulation is performed using structural damping and material damping as the modal damping of the battery pack; the bottom ball impact simulation includes simulating the ball impact on the bottom of the battery pack using extrusion heads of various shapes with different energies; the battery cell expansion cycle life simulation simulates the fatigue strength of multiple specified components in the battery pack when the expansion force changes cyclically during the battery charging and discharging process; the bonding performance simulation simulates the bonding performance of each bonding interface in the battery pack under battery pack expansion and mechanical impact;

[0010] S103, judging whether the current simulation results corresponding to each of the target simulation items are all qualified;

[0011] S104, if it is determined that the current simulation result corresponding to any one of the target simulation items is unqualified, the current simulation model of the target battery pack is optimized, and for the optimized simulation model of the target battery pack, the simulation of the target simulation item is performed using the current simulation model of the target battery pack for each target simulation item respectively, to obtain the current simulation result corresponding to the target simulation item;

[0012] S105: If it is determined that the current simulation results corresponding to the target simulation items are all qualified, then the simulation of the target battery pack is terminated.

[0013] Optionally, in the above-mentioned battery pack structure safety verification method, the mechanical modeling of the target battery pack to obtain the simulation model of the target battery pack includes:

[0014] S201, removing tiny chamfers on the main structure of the box of the target battery pack by geometric cleaning, extracting the mid-surface of the sheet metal, establishing welds according to welding positions, and setting a circle of regular circular hole grids in the locking area of ​​the bolts to obtain a system model of the main structure of the box of the target battery pack;

[0015] S202, establishing models of various components of the battery cells of the target battery pack, and simulating mechanical assembly connection relationships between the various components between the models of the various components to obtain a battery cell system model of the target battery pack;

[0016] S203, performing three-dimensional tetrahedral solid modeling on each electrical component of the target battery pack after digital modeling to obtain a model of each electrical component, extracting mid-surfaces of various electrical connectors, and simulating mechanical assembly through kinematic coupling constraints to obtain an electrical system model of the target battery pack;

[0017] S204, extracting the cold plate of the target battery pack and planning the characteristic lines of the flow channel, non-flow channel, and brazing area, and solid modeling the foam, structural adhesive, and thermal conductive adhesive of the thermal management system to obtain a thermal management system model of the target battery pack;

[0018] S205 , simulating the connection relationship between the thermal management system of the target battery and the main structure system of the box according to the installation process of the cold plate of the target battery pack.

[0019] Optionally, in the above-mentioned battery pack structure safety verification method, when the target simulation item is the modal simulation, simulating the target simulation item using the current simulation model of the target battery pack to obtain a current simulation result corresponding to the target simulation item includes:

[0020] S301, performing simulation analysis of the target prestress on an assembly simulation working condition including the target prestress;

[0021] S302. Based on the physical field obtained by completing the simulation analysis of the target prestress, a modal simulation analysis is performed on the simulation model of the target battery pack to obtain a current simulation result corresponding to the target simulation item.

[0022] Optionally, in the above-mentioned battery pack structure safety verification method, when the target simulation item is the random vibration simulation, simulating the target simulation item using the current simulation model of the target battery pack to obtain a current simulation result corresponding to the target simulation item includes:

[0023] S401, setting the structural damping of the target battery pack and the material damping of the components as the modal damping of the target battery pack, and setting a vibration spectrum loading curve of the target battery pack;

[0024] S402 , performing random vibration simulation using a simulation model of the target battery pack according to the modal damping and vibration spectrum loading curve of the target battery pack, and obtaining a current simulation result corresponding to the random vibration simulation.

[0025] Optionally, in the above-mentioned battery pack structure safety verification method, when the target simulation item is the bottom ball hitting simulation, simulating the target simulation item using the current simulation model of the target battery pack to obtain a current simulation result corresponding to the target simulation item includes:

[0026] S501, for each ball-hitting combination, on the basis of the simulation model of the target battery pack, establishing a simulation model corresponding to the ball-hitting combination, and setting the simulation initial boundary conditions corresponding to the ball-hitting combination; wherein one of the ball-hitting combinations includes an extrusion head of a certain shape and an extrusion energy;

[0027] S502. Perform a battery pack bottom ball shot simulation according to the simulation initial boundary conditions corresponding to each of the ball shot combinations through the simulation models corresponding to each of the ball shot combinations to obtain each current simulation result corresponding to the bottom ball shot simulation.

[0028] Optionally, in the above-mentioned battery pack structure safety verification method, when the target simulation item is the battery cell expansion cycle life simulation, the simulation of the target simulation item using the current simulation model of the target battery pack to obtain the current simulation result corresponding to the target simulation item includes:

[0029] S601, using the current simulation model of the target battery pack, simulating the expansion force of multiple target components of the target battery pack during the charging and discharging process of the target battery pack;

[0030] S602, obtaining the maximum expansion force and the minimum expansion force of each target component according to the simulation, and calculating the stress amplitude of each target component;

[0031] S603 , determining a current simulation result corresponding to the battery cell expansion cycle life simulation by comparing the stress amplitude of each target component with the fatigue strength of the material of each target component.

[0032] Optionally, in the above-mentioned battery pack structure safety verification method, when the target simulation item is the bonding performance simulation, simulating the target simulation item using the current simulation model of the target battery pack to obtain a current simulation result corresponding to the target simulation item includes:

[0033] S701, setting an expansion coefficient and an initial temperature on a simulation model of the target battery pack;

[0034] S702, performing expansion force simulation and mechanical impact simulation using the simulation model of the target battery pack, and obtaining stresses of each bonding interface of the target battery pack;

[0035] S703, respectively comparing the maximum stress among the stresses of each bonding interface with the bonding peel strength of the bonding glue of each bonding interface, to determine the current simulation result corresponding to each bonding interface;

[0036] S704: Calculate the stress mean value of each of the bonding interfaces, and determine the degree of adhesive failure of each of the bonding interfaces according to the stress mean value of each of the bonding interfaces.

[0037] A second aspect of the present application provides a battery pack structure safety verification device, comprising:

[0038] A modeling unit, used to perform mechanical modeling on a target battery pack to obtain a simulation model of the target battery pack; wherein the simulation model of the target battery pack includes a box body structure system model, a cell system model, an electrical system model, and a thermal management system model of the target battery pack;

[0039] A simulation unit is used to simulate each target simulation item respectively using the current simulation model of the target battery pack to obtain the current simulation result corresponding to the target simulation item; wherein, the target simulation items include modal simulation, random vibration simulation, bottom ball impact simulation, battery cell expansion cycle life simulation, and bonding performance simulation; the modal simulation is performed using the simulation result of the target prestress as the initial physical field boundary condition of the modal simulation; the target prestress is the reaction compression force on the large surface of the battery cell generated by the battery pack box frame structure being squeezed by the expansion force of the battery cell module; the random vibration simulation is performed using structural damping and material damping as the modal damping of the battery pack; the bottom ball impact simulation includes simulating the ball impact on the bottom of the battery pack using extrusion heads of various shapes with different energies; the battery cell expansion cycle life simulation simulates the fatigue strength of multiple specified components in the battery pack when the expansion force changes cyclically during the battery charging and discharging process; the bonding performance simulation simulates the bonding performance of each bonding interface in the battery pack under battery pack expansion and mechanical impact;

[0040] A judging unit, used to judge whether the current simulation results corresponding to each of the target simulation items are qualified;

[0041] an optimization unit, configured to optimize the current simulation model of the target battery pack when it is determined that the current simulation result corresponding to any one of the target simulation items is unqualified, and return to the simulation unit to execute the simulation of the target simulation item using the current simulation model of the target battery pack for each target simulation item respectively, and obtain the current simulation result corresponding to the target simulation item for the optimized simulation model of the target battery pack;

[0042] The ending unit is used to end the simulation of the target battery pack when it is determined that the current simulation results corresponding to each of the target simulation items are qualified.

[0043] A third aspect of the present application provides an electronic device, including:

[0044] Memory and processor;

[0045] Wherein, the memory is used to store programs;

[0046] The processor is used to execute the program, and when the program is executed, it is specifically used to implement the battery pack structure safety verification method as described in any one of the above items.

[0047] A fourth aspect of the present application provides a computer storage medium for storing a computer program, which, when executed by a processor, is used to implement a battery pack structure safety verification method as described in any one of the above.

[0048] The present application provides a battery pack structural safety verification method, which models the mechanical model of the target battery pack and obtains the simulation model of the target battery pack. Among them, the simulation model of the target battery pack includes the main structure system model of the box body of the target battery pack, the battery cell system model, the electrical system model and the thermal management system model, so as to construct a complete battery pack model, and facilitate the subsequent determination of the situation of each system in the verification process. Then, for each target simulation item, the simulation model of the current target battery pack is used to simulate the target simulation item to obtain the current simulation result corresponding to the target simulation item. Among them, the target simulation items include modal simulation, random vibration simulation, bottom ball impact simulation, battery cell expansion cycle life simulation, and bonding performance simulation. The modal simulation is performed with the simulation result of the target prestress as the initial physical field boundary condition of the modal simulation. The target prestress is the reaction compression force on the large surface of the battery cell generated by the battery pack box frame structure after being squeezed by the expansion force of the battery cell module. The random vibration simulation is performed with structural damping and material damping as the modal damping of the battery pack. The bottom ball impact simulation includes the simulation of ball impact on the bottom of the battery pack using extrusion heads of various shapes with different energies. The battery cell expansion cycle life simulation simulates the fatigue strength of multiple specified components in the battery pack when the expansion force changes cyclically during the battery charging and discharging process. The bonding performance simulation simulates the bonding performance of each bonding interface in the battery pack under battery pack expansion and mechanical impact, thereby achieving a comprehensive simulation verification of the target battery pack. Then, it is determined whether the current simulation results corresponding to each target simulation item are qualified. If the current simulation result corresponding to any target simulation item is determined to be unqualified, the simulation model of the current target battery pack is optimized, and for the optimized simulation model of the target battery pack, the simulation of the target simulation item is returned for each target simulation item, and the simulation of the target simulation item is performed using the current simulation model of the target battery pack to obtain the current simulation result corresponding to the target simulation item, so as to continuously optimize the battery design until it passes the safety verification. If it is judged that the current simulation results corresponding to each target simulation item are qualified, the simulation of the target battery pack is terminated. Thus, the battery can be subjected to modal simulation, random vibration simulation, bottom ball impact simulation, cell expansion cycle life simulation and bonding performance simulation through the constructed battery pack simulation model. Without constructing a battery pack sample, a comprehensive verification of the safety of the battery pack structure can be achieved, which effectively improves the battery development efficiency and ensures the safety of the developed battery pack structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0050] Figure 1 A flowchart of a battery pack structure safety verification method provided in an embodiment of the present application;

[0051] Figure 2 A flowchart of a method for establishing a simulation model of a target battery pack provided in an embodiment of the present application;

[0052] Figure 3 A flowchart of a method for modal simulation of a battery pack provided in an embodiment of the present application;

[0053] Figure 4 A flowchart of random vibration simulation of a battery pack provided in an embodiment of the present application;

[0054] Figure 5 A flowchart of a bottom ball hitting simulation of a battery pack provided in an embodiment of the present application;

[0055] Figure 6 A flow chart of a method for simulating the cell expansion cycle life of a battery pack provided in an embodiment of the present application;

[0056] Figure 7 A flowchart of a method for simulating the bonding performance of a battery pack provided in an embodiment of the present application;

[0057] Figure 8 A schematic diagram of the structure of a battery pack structure safety verification device provided in an embodiment of the present application;

[0058] Fig. 9 A schematic diagram of the architecture of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0060] In this application, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0061] The present application embodiment provides a battery pack structure safety verification method, such as Figure 1 As shown, including:

[0062] S101, building a mechanical model of a target battery pack to obtain a simulation model of the target battery pack.

[0063] The target battery pack may be any battery pack that needs to be simulated.

[0064] In order to establish an accurate mechanical model for the target battery and determine the conditions of each system of the target battery pack during the simulation process, the simulation model of the target battery pack includes the target battery pack's box main structure system model, battery cell system model, electrical system model and thermal management system model.

[0065] Specifically, according to the design parameters of each system of the target battery pack, the box main structure system model, battery cell system model, electrical system model and thermal management system model of the target battery pack can be constructed separately, and the connection relationship between each system can be constructed, so that each system constitutes an integral target battery pack.

[0066] Optionally, in another embodiment of the present application, a specific implementation of step S101 is as follows: Figure 2 As shown, the following steps are included:

[0067] S201. Remove tiny chamfers on the main structure of the target battery pack box through geometric cleaning, extract the mid-surface of the sheet metal, establish welds according to the welding positions, and set a circle of regular circular hole grids in the locking area of ​​the bolts to obtain the main structure system model of the target battery pack box.

[0068] Specifically, for the simulation model building of the box main structure system, tiny chamfers are removed mainly through geometric cleaning, the mid-surface of the sheet metal is extracted, the weld is established according to the actual welding position, and a circle of regular circular hole grid is specially made in the locking area of ​​the bolts of the battery pack.

[0069] S202 , establishing models of various components of the battery cells of the target battery pack, and simulating mechanical assembly connection relationships between the various components among the models of the various components, to obtain a battery cell system model of the target battery pack.

[0070] Specifically, the simulation model of the battery system mainly builds models of battery shell, battery winding, battery pole, battery bar, silicon foam, insulating PC, or aerogel, mica and other components between batteries, and simulates the mechanical assembly connection relationship between the components as realistically as possible. Among them, the two ends of various fillers between batteries can be specifically processed as TIE contact connection.

[0071] S203, after digitalizing each electrical component of the target battery pack, perform three-dimensional tetrahedral solid modeling to obtain the model of each electrical component, extract the mid-surface of various electrical connectors, and simulate the mechanical assembly through motion coupling constraints to obtain the electrical system model of the target battery pack.

[0072] Specifically, the simulation modeling of the electrical system of the battery pack mainly involves digital modeling of the electrical parts of the injection-molded shells of various contactors, fuses, BMS, BDU, etc., and then 3D tetrahedron solid modeling, and adjusting the material density to make it the same as the actual weight. Then, the mechanical assembly is simulated through motion coupling constraints. Among them, the mid-surface of electrical connectors such as copper busbars and thin-shell metal brackets used for binding and fixing is extracted, and the mechanical assembly is simulated through motion coupling constraints.

[0073] S204, extract the shell of the cold plate of the target battery pack and plan the characteristic lines of the flow channel, non-flow channel, and brazing area, and perform solid modeling on the foam, structural adhesive, and thermal conductive adhesive of the thermal management system to obtain a thermal management system model of the target battery pack.

[0074] Specifically, for the thermal management system of the battery pack, the cold plate is mainly shelled, and the flow channel, non-flow channel, and characteristic lines of the brazing area are reserved. The foam, structural adhesive, and thermal conductive adhesive of the thermal management system are solid modeled.

[0075] S205 , simulating the connection relationship between the thermal management system of the target battery and the main structural system of the box according to the installation process of the cold plate of the target battery pack.

[0076] Among them, if it is stir friction welding, the solid weld modeling of the common node is adopted, and if it is an FDS process, the screws drilled in each FDS flow are established.

[0077] S102 , for each target simulation item, use the current simulation model of the target battery pack to simulate the target simulation item, and obtain a current simulation result corresponding to the target simulation item.

[0078] Among them, the target simulation items include modal simulation, random vibration simulation, bottom ball impact simulation, cell expansion cycle life simulation, and bonding performance simulation. In order to comprehensively test the structural safety of the target battery pack, it is necessary to use the constructed simulation model of the target battery pack to perform the above-mentioned simulations respectively.

[0079] It should be noted that the current battery pack modal simulation generally only considers the fixed constraints of the fixed points of the battery pack. It does not take into account the change in stiffness of the entire battery module after the battery pack box structure is affected by the expansion and backlog of the battery cells during the actual charge and discharge cycle, resulting in a large difference between the simulation and the actual force boundary, and the simulation structure accuracy is slightly poor, which cannot accurately predict the state of the actual product, and thus causes product design failure and repeated testing and verification of samples. Therefore, the target prestress is introduced in the embodiment of the present application. Among them, the target prestress is the reaction compression force on the large surface of the battery cell generated after the battery pack box frame structure is squeezed by the expansion force of the battery cell module. Therefore, the modal simulation is performed with the simulation result of the target prestress as the initial physical field boundary condition of the modal simulation.

[0080] The current simulation method lacks consideration of the huge differences in vibration attenuation characteristics of different component materials, and only assigns the same quantitative parameters, resulting in low simulation progress. Therefore, in the embodiment of the present application, random vibration simulation is performed with structural damping and material damping as the modal damping of the battery pack, which can more accurately predict the safety of the battery pack structural vibration and avoid vibration structural failure problems in the designed battery pack under subsequent vibration tests and actual usage conditions.

[0081] For the bottom ball hitting simulation, in order to take into account various adverse conditions of the bottom protection of the battery pack and to make the structural safety verification of the bottom protection more applicable, in an embodiment of the present application, the bottom ball hitting simulation includes simulating the ball hitting of the bottom of the battery pack using extrusion heads of various shapes and different energies.

[0082] The existing expansion force test only considers the structural strength of the battery cell at the peak expansion force, but ignores the fact that the battery pack undergoes a reciprocating expansion force cycle during use, which is charging from the lowest SOC to the highest SOC, and then discharging from the highest SOC to the lowest SOC. That is, the cycle life of the battery cell's expansion force is not considered and included in the verification. Therefore, in the embodiment of the present application, the fatigue strength during the cyclic change of the expansion force is considered on the basis of the existing expansion force verification. Therefore, the battery cell expansion cycle life simulation in the embodiment of the present application simulates the fatigue strength of multiple specified components in the battery pack during the cyclic change of the expansion force during the battery charging and discharging process.

[0083] As the integration of power batteries becomes higher and higher, CTP technology uses a lot of adhesive to improve the structural strength of the battery pack. Therefore, the adhesiveness of the battery pack is an important structural safety assessment item that affects the long service life of the vehicle in various harsh working environments. However, there is basically no disclosure of simulation technology involving this simulation condition. Therefore, in the embodiments of the present application, based on the existing expansion force and mechanical impact simulation technology, it is proposed to use bonding performance simulation. The bonding performance simulation simulates the bonding performance of each bonding interface in the battery pack under battery pack expansion and mechanical impact.

[0084] Optionally, in another embodiment of the present application, when the target simulation item is a modal simulation, a specific implementation of step S102, that is, a specific implementation of the modal simulation of the battery pack, is as follows: Figure 3 As shown, including:

[0085] S301, performing simulation analysis of target prestress on an assembly simulation condition including target prestress.

[0086] S302. Based on the physical field obtained by completing the simulation analysis of the target prestress, a modal simulation analysis is performed on the simulation model of the target battery pack to obtain a current simulation result corresponding to the target simulation item.

[0087] Specifically, in the embodiment of the present application, the assembly simulation condition of the target prestress is introduced, and after completing the prestress analysis of this step, the modal simulation analysis is performed based on the physical field results, so that the simulation results of the target prestress are used as the initial physical field boundary conditions of the modal simulation, which is equivalent to completing the mechanical environment simulation of the battery pack in the actual installation and tooling environment. The simulation method of this process improves the simulation accuracy and the consistency with the actual product test results.

[0088] For example, as shown in Table 1 below, by comparing the modal analysis results of loading prestress with the modal results of not loading prestress, as well as the experimental test data, it can be seen that the model analysis method of loading prestress has higher accuracy.

[0089] Table 1

[0090]

[0091] Optionally, in another embodiment of the present application, when the target simulation item is a random vibration simulation, a specific implementation of step S102, that is, a specific implementation of the random vibration simulation of the battery pack, is as follows: Figure 4 As shown, including:

[0092] S401. Setting the structural damping of the target battery pack and the material damping of the components as the modal damping of the target battery pack, and setting the vibration spectrum loading curve of the target battery pack.

[0093] S402 , performing random vibration simulation using a simulation model of the target battery pack according to the modal damping and vibration spectrum loading curve of the target battery pack, and obtaining a current simulation result corresponding to the random vibration simulation.

[0094] Specifically, the modal damping of the battery pack and the vibration spectrum loading curve to which the battery pack is subjected are set, and then a random vibration simulation analysis is submitted to perform random vibration simulation.

[0095] Optionally, in another embodiment of the present application, when the target simulation item is a bottom ball hitting simulation, a specific implementation of step S102, that is, a specific implementation of a bottom ball hitting simulation of a battery pack, is as follows: Figure 5 As shown, including:

[0096] S501. For each ball-hitting combination, based on the simulation model of the target battery pack, a simulation model corresponding to the ball-hitting combination is established, and initial simulation boundary conditions corresponding to the ball-hitting combination are set.

[0097] Among them, a ball hitting combination includes an extrusion head of a certain shape and an extrusion energy. Optionally, the ball hitting combination can specifically include: a hemispherical head cylinder with a 120J energy D25, a mountain-shaped extrusion head with a 240J energy, a flat head cylinder with a 240J energy Φ10, and a hemispherical head cylinder with a 240J energy D25. Of course, other combinations can also be set according to needs.

[0098] S502, performing a battery pack bottom ball hit simulation according to the simulation initial boundary conditions corresponding to each ball hit combination through the simulation model corresponding to each ball hit combination, and obtaining each current simulation result corresponding to the bottom ball hit simulation.

[0099] Optionally, in another embodiment of the present application, when the target simulation item is a battery cell expansion cycle life simulation, a specific implementation of step S102, that is, a specific implementation of a battery cell expansion cycle life simulation of a battery pack, is as follows: Figure 6 As shown, including:

[0100] S601 , using the current simulation model of the target battery pack, simulate the expansion force of multiple target components of the target battery pack during the charge and discharge process of the target battery pack.

[0101] The target component is a specified component that needs to be tested.

[0102] S602, obtaining the maximum expansion force and the minimum expansion force of each target component according to the simulation, and calculating the stress amplitude of each target component.

[0103] The maximum expansion force is when the battery is at its maximum capacity, usually at 100% SOC. The minimum expansion force is when the battery is at its minimum capacity, usually at 3% SOC. Subtracting the minimum expansion force from the maximum expansion force will give the stress amplitude.

[0104] S603 , by comparing the stress amplitude of each target component with the fatigue strength of the material of each target component, determine the current simulation result corresponding to the battery cell expansion cycle life simulation.

[0105] Among them, when the stress amplitude to which the target component is subjected is less than the fatigue strength of the material of the target component, the simulation of the battery cell expansion cycle life of the target component is determined to be qualified. Specifically, the simulation results of each target component can be used to form the current simulation result corresponding to the battery cell expansion cycle life simulation. It is also possible to determine the current simulation result corresponding to the battery cell expansion cycle life simulation based on the simulation results of each target component, such as: if the simulation results of each target component are qualified, then the current simulation result corresponding to the battery cell expansion cycle life simulation is determined to be qualified. If the simulation result of any target component is unqualified, then the current simulation result corresponding to the battery cell expansion cycle life simulation is determined to be unqualified.

[0106] Optionally, in another embodiment of the present application, when the target simulation item is the bonding performance simulation, a specific implementation of step S102, that is, a specific implementation of the bonding performance simulation of the battery pack, is as follows: Figure 7 As shown, including:

[0107] S701 . Set the expansion coefficient and initial temperature on the simulation model of the target battery pack.

[0108] S702 , using the simulation model of the target battery pack to perform expansion force simulation and mechanical impact simulation, and obtain the stress of each bonding interface of the target battery pack.

[0109] The various bonding interfaces may be all the bonding interfaces, or may be a few selected most important bonding interfaces, or may be the weakest bonding interface.

[0110] Specifically, the battery cell is loaded with a changing temperature curve to simulate the thermal expansion process of the whole pack. When the battery cell reaches the expected maximum expansion force, the expansion force simulation condition is terminated, and under the premise of the maximum physical field of the maximum expansion force condition applying the maximum restraint force to the battery pack beam, the impact curve required by the national standard or enterprise standard for the whole pack is set to perform mechanical impact simulation analysis.

[0111] S703: Compare the maximum stress of each bonding interface with the bonding peel strength of the bonding glue of each bonding interface to determine the current simulation result corresponding to each bonding interface.

[0112] S704, calculating the stress mean value of each bonding interface, and determining the degree of adhesive failure of each bonding interface according to the stress mean value of each bonding interface.

[0113] S103: Determine whether the current simulation results corresponding to each target simulation item are all qualified.

[0114] If it is determined that the current simulation result corresponding to any target simulation item is unqualified, it means that there is still a security problem, so step S104 is performed at this time. If it is determined that the current simulation results corresponding to each target simulation item are all qualified, step S105 can be performed.

[0115] S104: Optimize the simulation model of the current target battery pack.

[0116] Specifically, the design of the target battery pack can be adjusted in a targeted manner according to the qualified target simulation items, and then the simulation model of the current target battery pack can be optimized according to the design adjustments.

[0117] It should be noted that after executing step S104, since the design of the target battery pack is adjusted, in order to verify the structural safety of the adjusted target battery, the simulation model of the optimized target battery pack is returned to execute step S102.

[0118] S105: End the simulation of the target battery pack.

[0119] Since all target simulation items of the target battery pack have passed verification at this time, the parameters of the simulation model of the current target battery pack can be output to generate the target battery pack according to these parameters.

[0120] The embodiment of the present application provides a battery pack structure safety verification method, which models the mechanical model of the target battery pack to obtain a simulation model of the target battery pack. Among them, the simulation model of the target battery pack includes the main structure system model of the box body of the target battery pack, the battery cell system model, the electrical system model and the thermal management system model, so as to construct a complete battery pack model, and facilitate the subsequent determination of the situation of each system in the verification process. Then, for each target simulation item, the simulation model of the current target battery pack is used to simulate the target simulation item to obtain the current simulation result corresponding to the target simulation item. Among them, the target simulation items include modal simulation, random vibration simulation, bottom ball impact simulation, battery cell expansion cycle life simulation, and bonding performance simulation. The modal simulation is performed with the simulation result of the target prestress as the initial physical field boundary condition of the modal simulation. The target prestress is the reaction compression force on the large surface of the battery cell generated by the battery pack box frame structure after being squeezed by the expansion force of the battery cell module. The random vibration simulation is performed with structural damping and material damping as the modal damping of the battery pack. The bottom ball impact simulation includes the simulation of ball impact on the bottom of the battery pack using extrusion heads of various shapes with different energies. The battery cell expansion cycle life simulation simulates the fatigue strength of multiple specified components in the battery pack when the expansion force changes cyclically during the battery charging and discharging process. The bonding performance simulation simulates the bonding performance of each bonding interface in the battery pack under battery pack expansion and mechanical impact, thereby achieving a comprehensive simulation verification of the target battery pack. Then, it is determined whether the current simulation results corresponding to each target simulation item are qualified. If the current simulation result corresponding to any target simulation item is determined to be unqualified, the simulation model of the current target battery pack is optimized, and for the optimized simulation model of the target battery pack, the simulation of the target simulation item is returned for each target simulation item, and the simulation of the target simulation item is performed using the current simulation model of the target battery pack to obtain the current simulation result corresponding to the target simulation item, so as to continuously optimize the battery design until it passes the safety verification. If it is judged that the current simulation results corresponding to each target simulation item are qualified, the simulation of the target battery pack is terminated. Thus, the battery can be subjected to modal simulation, random vibration simulation, bottom ball impact simulation, cell expansion cycle life simulation and bonding performance simulation through the constructed battery pack simulation model. Without constructing a battery pack sample, a comprehensive verification of the safety of the battery pack structure can be achieved, which effectively improves the battery development efficiency and ensures the safety of the developed battery pack structure.

[0121] It should be noted that the various target simulation item settings in this application have an intrinsic relationship, and they influence and depend on each other. Modal simulation provides the basis for random vibration simulation; the bonding performance simulation can ensure the overall stiffness of the battery pack, so that each component remains relatively stable during the impact process, and reduce local stress concentration, thereby improving the impact resistance of the battery pack. During the bottom ball hitting process, the bonding layer will participate in the absorption and transfer of energy. If the bonding performance is poor, it may cause part of the energy to concentrate at the bonding interface, increase the risk of damage to the bonding layer, and further affect the overall performance of the battery pack. The two can verify and calibrate each other; the cell expansion cycle life simulation can provide dynamic data of cell expansion for the prestress simulation, and the prestress simulation can verify the influence of cell expansion on the battery pack structure. The two complement each other and jointly guide the design and optimization of the battery pack. In practical applications, prestress simulation can be performed first to determine the prestress distribution of the structure; then random vibration simulation can be performed to analyze the performance of the battery pack under a vibration environment; then bottom ball impact simulation can be performed to ensure the safety of the battery pack when impacted; at the same time, cell expansion cycle life simulation can be performed to predict the battery life; finally, bonding performance simulation can be performed to evaluate the performance of the adhesive in the battery pack. This can improve the simulation efficiency, as well as the reliability and safety of the battery pack simulation.

[0122] Another embodiment of the present application provides a battery pack structure safety verification device, such as Figure 8 As shown, including:

[0123] The modeling unit 801 is used to perform mechanical modeling on the target battery pack to obtain a simulation model of the target battery pack.

[0124] Among them, the simulation model of the target battery pack includes the target battery pack's box main structure system model, battery cell system model, electrical system model and thermal management system model.

[0125] The simulation unit 802 is used to simulate each target simulation item respectively using the simulation model of the current target battery pack to obtain a current simulation result corresponding to the target simulation item.

[0126] Among them, the target simulation items include modal simulation, random vibration simulation, bottom ball impact simulation, battery cell expansion cycle life simulation, and bonding performance simulation. The modal simulation is performed with the simulation results of the target prestress as the initial physical field boundary conditions of the modal simulation. The target prestress is the reaction compression force on the large surface of the battery cell generated after the battery pack box frame structure is squeezed by the expansion force of the battery cell module. The random vibration simulation is performed with structural damping and material damping as the modal damping of the battery pack. The bottom ball impact simulation includes the simulation of ball impact on the bottom of the battery pack using extrusion heads of various shapes with different energies. The battery cell expansion cycle life simulation simulates the fatigue strength of multiple specified components in the battery pack when the expansion force changes cyclically during the battery charging and discharging process. The bonding performance simulation simulates the bonding performance of each bonding interface in the battery pack under battery pack expansion and mechanical impact.

[0127] The judging unit 803 is used to judge whether the current simulation results corresponding to each target simulation item are all qualified.

[0128] The optimization unit 804 is used to optimize the simulation model of the current target battery pack when it is determined that the current simulation result corresponding to any target simulation item is unqualified, and return to the simulation unit to execute the simulation of the target simulation item using the simulation model of the current target battery pack for each target simulation item after the optimization, so as to obtain the current simulation result corresponding to the target simulation item.

[0129] The ending unit 805 is used to end the simulation of the target battery pack when it is determined that the current simulation results corresponding to each target simulation item are qualified.

[0130] Optionally, in a battery pack structure safety verification device provided in another embodiment of the present application, the modeling unit includes:

[0131] The box modeling unit is used to remove tiny chamfers on the main structure of the box of the target battery pack through geometric cleaning, extract the mid-surface of the sheet metal parts, establish welds according to the welding positions, and set a circle of regular circular hole grids in the locking area of ​​the bolts to obtain the main structure system model of the box of the target battery pack.

[0132] The cell modeling unit is used to build models of various components of the cell of the target battery pack, and simulate the mechanical assembly connection relationship between the models of various components to obtain the cell system model of the target battery pack.

[0133] The electrical modeling unit is used to perform three-dimensional tetrahedral solid modeling on the digital blocks of each electrical component of the target battery pack to obtain the model of each electrical component, as well as to extract the mid-surface of various electrical connectors, and simulate the mechanical assembly through motion coupling constraints to obtain the electrical system model of the target battery pack.

[0134] The management system modeling unit is used to extract the shell of the cold plate of the target battery pack and plan the characteristic lines of the flow channel, non-flow channel, and brazing area, and to perform solid modeling of the foam, structural adhesive, and thermal conductive adhesive of the thermal management system to obtain the thermal management system model of the target battery pack.

[0135] The connection unit is used to simulate the connection relationship between the thermal management system of the target battery and the main structure system of the box body according to the installation process of the cold plate of the target battery pack.

[0136] Optionally, in a battery pack structure safety verification device provided in another embodiment of the present application, when the target simulation item is a modal simulation, the simulation unit is used to:

[0137] Perform simulation analysis of target prestress on assembly simulation conditions that include target prestress.

[0138] On the basis of the physical field obtained from the simulation analysis of the target prestress, a modal simulation analysis is performed on the simulation model of the target battery pack to obtain the current simulation result corresponding to the target simulation item.

[0139] Optionally, in a battery pack structure safety verification device provided in another embodiment of the present application, when the target simulation item is a random vibration simulation, the simulation unit is used to:

[0140] The structural damping of the target battery pack and the material damping of the components are set as the modal damping of the target battery pack, and the vibration spectrum loading curve of the target battery pack is set.

[0141] According to the modal damping and vibration spectrum loading curve of the target battery pack, random vibration simulation is performed using the simulation model of the target battery pack to obtain a current simulation result corresponding to the random vibration simulation.

[0142] Optionally, in a battery pack structure safety verification device provided in another embodiment of the present application, when the target simulation item is a bottom ball hitting simulation, the simulation unit is used to:

[0143] For each ball-hitting combination, a simulation model corresponding to the ball-hitting combination is established based on the simulation model of the target battery pack, and the simulation initial boundary conditions corresponding to the ball-hitting combination are set. A ball-hitting combination includes an extrusion head of a certain shape and an extrusion energy.

[0144] According to the simulation initial boundary conditions corresponding to each ball shot combination, the battery pack bottom ball shot simulation is performed through the simulation model corresponding to each ball shot combination to obtain each current simulation result corresponding to the bottom ball shot simulation.

[0145] Optionally, in a battery pack structure safety verification device provided in another embodiment of the present application, the target simulation item is a battery cell expansion cycle life simulation, and the simulation unit is used to:

[0146] The current simulation model of the target battery pack is used to simulate the expansion force of multiple target components of the target battery pack during the charge and discharge process of the target battery pack.

[0147] The maximum expansion force and the minimum expansion force of each target component are obtained according to the simulation, and the stress amplitude of each target component is calculated.

[0148] By comparing the stress amplitude of each target component with the fatigue strength of the material of each target component, the current simulation result corresponding to the battery cell expansion cycle life simulation is determined.

[0149] Optionally, in a battery pack structure safety verification device provided in another embodiment of the present application, when the target simulation item is bonding performance simulation, the simulation unit is used to:

[0150] Set the expansion coefficient and initial temperature on the simulation model of the target battery pack.

[0151] The simulation model of the target battery pack is used to perform expansion force simulation and mechanical impact simulation, and the stress of each bonding interface of the target battery pack is obtained.

[0152] The maximum stress of each bonding interface stress is compared with the bonding peel strength of the bonding glue of each bonding interface to determine the current simulation result corresponding to each bonding interface.

[0153] The stress mean of each bonding interface is calculated, and the degree of adhesive failure of each bonding interface is determined according to the stress mean of each bonding interface.

[0154] It should be noted that the specific working process of each unit provided in the above embodiments of the present application can refer to the implementation process of the corresponding steps in the above method embodiments, and will not be repeated here.

[0155] Another embodiment of the present application provides an electronic device, such as Fig. 9 As shown, including:

[0156] Memory 901 and processor 902 .

[0157] The memory 901 is used to store programs.

[0158] The processor 902 is used to execute the program stored in the memory 901. When the program is executed, it is specifically used to implement the battery pack structure safety verification method provided in any of the above embodiments.

[0159] Another embodiment of the present application provides a computer storage medium for storing a computer program, which, when executed by a processor, is used to implement a battery pack structure safety verification method such as any one of the above.

[0160] Computer storage media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include temporary computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0161] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0162] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery pack structure safety verification method, characterized in that: include: S101, performing mechanical modeling on a target battery pack to obtain a simulation model of the target battery pack; wherein the simulation model of the target battery pack includes a box body structure system model, a cell system model, an electrical system model, and a thermal management system model of the target battery pack; S102. For each target simulation item, respectively, use the current simulation model of the target battery pack to simulate the target simulation item to obtain the current simulation result corresponding to the target simulation item; wherein, the target simulation items include modal simulation, random vibration simulation, bottom ball impact simulation, battery cell expansion cycle life simulation, and bonding performance simulation; the modal simulation is performed using the simulation result of the target prestress as the initial physical field boundary condition of the modal simulation; the target prestress is the reaction compression force on the large surface of the battery cell generated after the battery pack box frame structure is squeezed by the expansion force of the battery cell module; the random vibration simulation is performed using structural damping and material damping as the modal damping of the battery pack; the bottom ball impact simulation includes simulating the ball impact on the bottom of the battery pack using extrusion heads of various shapes with different energies; the battery cell expansion cycle life simulation simulates the fatigue strength of multiple specified components in the battery pack when the expansion force changes cyclically during the battery charging and discharging process; the bonding performance simulation simulates the bonding performance of each bonding interface in the battery pack under battery pack expansion and mechanical impact; S103, judging whether the current simulation results corresponding to each of the target simulation items are all qualified; S104, if it is determined that the current simulation result corresponding to any one of the target simulation items is unqualified, the current simulation model of the target battery pack is optimized, and for the optimized simulation model of the target battery pack, the simulation of the target simulation item is performed using the current simulation model of the target battery pack for each target simulation item respectively, to obtain the current simulation result corresponding to the target simulation item; S105: If it is determined that the current simulation results corresponding to the target simulation items are all qualified, then the simulation of the target battery pack is terminated.

2. The method according to claim 1, characterized in that The step of performing mechanical modeling on the target battery pack to obtain a simulation model of the target battery pack includes: S201, removing tiny chamfers on the main structure of the box of the target battery pack by geometric cleaning, extracting the mid-surface of the sheet metal, establishing welds according to welding positions, and setting a circle of regular circular hole grids in the locking area of ​​the bolts to obtain a system model of the main structure of the box of the target battery pack; S202, establishing models of various components of the battery cells of the target battery pack, and simulating mechanical assembly connection relationships between the various components between the models of the various components to obtain a battery cell system model of the target battery pack; S203, performing three-dimensional tetrahedral solid modeling on each electrical component of the target battery pack after digital modeling to obtain a model of each electrical component, extracting mid-surfaces of various electrical connectors, and simulating mechanical assembly through kinematic coupling constraints to obtain an electrical system model of the target battery pack; S204, extracting the cold plate of the target battery pack and planning the characteristic lines of the flow channel, non-flow channel, and brazing area, and solid modeling the foam, structural adhesive, and thermal conductive adhesive of the thermal management system to obtain a thermal management system model of the target battery pack; S205 , simulating the connection relationship between the thermal management system of the target battery and the main structure system of the box according to the installation process of the cold plate of the target battery pack.

3. The method according to claim 1, characterized in that When the target simulation item is the modal simulation, the simulation of the target simulation item is performed using the current simulation model of the target battery pack to obtain a current simulation result corresponding to the target simulation item, including: S301, performing simulation analysis of the target prestress on an assembly simulation working condition including the target prestress; S302. Based on the physical field obtained by completing the simulation analysis of the target prestress, a modal simulation analysis is performed on the simulation model of the target battery pack to obtain a current simulation result corresponding to the target simulation item.

4. The method according to claim 1, characterized in that When the target simulation item is the random vibration simulation, the simulation of the target simulation item is performed using the current simulation model of the target battery pack to obtain a current simulation result corresponding to the target simulation item, including: S401, setting the structural damping of the target battery pack and the material damping of the components as the modal damping of the target battery pack, and setting a vibration spectrum loading curve of the target battery pack; S402 , performing random vibration simulation using a simulation model of the target battery pack according to the modal damping and vibration spectrum loading curve of the target battery pack, and obtaining a current simulation result corresponding to the random vibration simulation.

5. The method according to claim 1, characterized in that When the target simulation item is the bottom ball hitting simulation, the simulation of the target simulation item is performed using the current simulation model of the target battery pack to obtain a current simulation result corresponding to the target simulation item, including: S501, for each ball-hitting combination, on the basis of the simulation model of the target battery pack, establishing a simulation model corresponding to the ball-hitting combination, and setting the simulation initial boundary conditions corresponding to the ball-hitting combination; wherein one of the ball-hitting combinations includes an extrusion head of a certain shape and an extrusion energy; S502. Perform a battery pack bottom ball shot simulation according to the simulation initial boundary conditions corresponding to each of the ball shot combinations through the simulation models corresponding to each of the ball shot combinations to obtain each current simulation result corresponding to the bottom ball shot simulation.

6. The method according to claim 1, characterized in that When the target simulation item is the battery cell expansion cycle life simulation, the simulation of the target simulation item is performed using the current simulation model of the target battery pack to obtain the current simulation result corresponding to the target simulation item, including: S601, using the current simulation model of the target battery pack, simulating the expansion force of multiple target components of the target battery pack during the charging and discharging process of the target battery pack; S602, obtaining the maximum expansion force and the minimum expansion force of each target component according to the simulation, and calculating the stress amplitude of each target component; S603 , determining a current simulation result corresponding to the battery cell expansion cycle life simulation by comparing the stress amplitude of each target component with the fatigue strength of the material of each target component.

7. The method according to claim 1, characterized in that When the target simulation item is the bonding performance simulation, the simulation of the target simulation item is performed using the current simulation model of the target battery pack to obtain a current simulation result corresponding to the target simulation item, including: S701, setting an expansion coefficient and an initial temperature on a simulation model of the target battery pack; S702, performing expansion force simulation and mechanical impact simulation using the simulation model of the target battery pack, and obtaining stresses of each bonding interface of the target battery pack; S703, respectively comparing the maximum stress among the stresses of each bonding interface with the bonding peel strength of the bonding glue of each bonding interface, to determine the current simulation result corresponding to each bonding interface; S704: Calculate the stress mean value of each of the bonding interfaces, and determine the degree of adhesive failure of each of the bonding interfaces according to the stress mean value of each of the bonding interfaces.

8. A battery pack structure safety verification device, characterized in that: include: A modeling unit, used to perform mechanical modeling on a target battery pack to obtain a simulation model of the target battery pack; wherein the simulation model of the target battery pack includes a box body structure system model, a cell system model, an electrical system model, and a thermal management system model of the target battery pack; A simulation unit is used to simulate each target simulation item respectively using the current simulation model of the target battery pack to obtain the current simulation result corresponding to the target simulation item; wherein, the target simulation items include modal simulation, random vibration simulation, bottom ball impact simulation, battery cell expansion cycle life simulation, and bonding performance simulation; the modal simulation is performed using the simulation result of the target prestress as the initial physical field boundary condition of the modal simulation; the target prestress is the reaction compression force on the large surface of the battery cell generated by the battery pack box frame structure being squeezed by the expansion force of the battery cell module; the random vibration simulation is performed using structural damping and material damping as the modal damping of the battery pack; the bottom ball impact simulation includes simulating the ball impact on the bottom of the battery pack using extrusion heads of various shapes with different energies; the battery cell expansion cycle life simulation simulates the fatigue strength of multiple specified components in the battery pack when the expansion force changes cyclically during the battery charging and discharging process; the bonding performance simulation simulates the bonding performance of each bonding interface in the battery pack under battery pack expansion and mechanical impact; A judging unit, used to judge whether the current simulation results corresponding to each of the target simulation items are qualified; an optimization unit, configured to optimize the current simulation model of the target battery pack when it is determined that the current simulation result corresponding to any one of the target simulation items is unqualified, and return to the simulation unit to execute the simulation of the target simulation item using the current simulation model of the target battery pack for each target simulation item respectively, and obtain the current simulation result corresponding to the target simulation item for the optimized simulation model of the target battery pack; The ending unit is used to end the simulation of the target battery pack when it is determined that the current simulation results corresponding to each of the target simulation items are qualified.

9. An electronic device, characterized in that: include: Memory and processor; Wherein, the memory is used to store programs; The processor is used to execute the program, and when the program is executed, it is specifically used to implement the battery pack structure safety verification method as described in any one of claims 1 to 7.

10. A computer storage medium, characterized in that: Used to store a computer program, which, when executed by a processor, is used to implement the battery pack structure safety verification method as described in any one of claims 1 to 7.

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