A battery pack simulation method and device

Abstract

The present invention discloses a battery pack simulation method and device, including: obtaining the structural characteristics and heat transfer performance of each component of the N components of the target battery pack, N being a positive integer greater than 1; determining the resource occupancy rate of each component during the simulation process according to the structural characteristics of each component; simplifying the structure of each component according to the heat transfer performance and resource occupancy rate corresponding to each component to obtain N components after structural simplification; and constructing a simulation model of the target battery pack according to the N components after structural simplification. On the one hand, the present application reduces the consumption of computing resources and the solution cycle, and on the other hand, it can also obtain simulation results with higher credibility based on such a simulation model, and better balances the relationship between the solution cycle and the consumption of computing resources and the credibility of the insulation simulation results, ensuring that under the premise of having certain computing resources, simulation results with higher credibility are obtained within a suitable solution cycle.

Description

Technical Field

[0001] The present invention relates to the field of simulation technology, and in particular to a battery pack simulation method and device. Background Art

[0002] The endurance of new energy vehicles will face great challenges in winter environments. The main reason is that the endurance of the power battery pack will be greatly reduced in low temperature environments. Therefore, it is necessary to do a good job of thermal insulation and protection of the power battery pack.

[0003] In the related art, when studying the thermal insulation measures of power battery packs, it is mainly achieved through two methods: experiment and simulation. Among them, when simulating the battery pack, the battery pack needs to be simplified, but there are the following problems:

[0004] When the battery pack components are simplified too much, although the number of networks is relatively small, the quality is relatively high, the solution cycle is short, and the computing resource consumption is small, the credibility of the insulation simulation results will decrease;

[0005] When the battery pack components are too simply simplified, the credibility of the thermal insulation simulation results will increase, but the number of grids is relatively large, the quality is relatively low, the solution cycle is long, and the computing resources are consumed a lot.

[0006] Therefore, how to balance computing resources and the credibility of simulation results is an urgent problem to be solved. Summary of the invention

[0007] The embodiments of the present application provide a battery pack simulation method and device, which solves the technical problem in the prior art that computing resources and the credibility of simulation results cannot be balanced when performing thermal insulation simulation on a battery, thereby achieving the technical effect of balancing computing resources and the credibility of simulation results, ensuring a high degree of credibility of the simulation results while avoiding the use of excessive computing resources.

[0008] In a first aspect, the present application provides a battery pack simulation method, the method comprising:

[0009] Obtaining structural characteristics and heat transfer performance of each of N components of a target battery pack, where N is a positive integer greater than 1;

[0010] According to the structural characteristics of each component, determine the resource occupancy rate of each component during the simulation process;

[0011] According to the heat transfer performance and resource occupancy rate corresponding to each component, the structure of each component is simplified to obtain N components with simplified structures;

[0012] A simulation model of the target battery pack is constructed based on the N components after structural simplification.

[0013] Furthermore, the structural characteristics and heat transfer performance of each of the N components of the target battery pack are obtained, including:

[0014] Obtaining structural characteristics, material density, specific heat capacity and thermal conductivity of each of the N components;

[0015] The heat transfer performance of each component is determined based on its structural characteristics, material density, specific heat capacity and thermal conductivity.

[0016] Furthermore, when the component is the air domain inside the target battery pack, the structure of each component is simplified according to the heat transfer performance and resource occupancy rate corresponding to each component, including:

[0017] Determining whether the heat transfer performance of the air domain exceeds a first preset heat transfer performance;

[0018] When the heat transfer performance of the air domain exceeds the first preset heat transfer performance, determining whether the resource occupancy rate of the air domain exceeds the first preset resource occupancy rate;

[0019] When the resource occupancy rate of the air domain exceeds a first preset resource occupancy rate, the fillet features of the air domain, the cavity features in the end plate, and the threaded hole features are removed to simplify the structure of the air domain.

[0020] Furthermore, when the component is the upper box of the target battery pack, the structure of each component is simplified according to the heat transfer performance and resource occupancy rate corresponding to each component, including:

[0021] Determining whether the heat transfer performance of the upper box exceeds a second preset heat transfer performance;

[0022] When the heat transfer performance of the upper box exceeds the second preset heat transfer performance, determining whether the resource occupancy rate of the upper box exceeds the second preset resource occupancy rate;

[0023] When the resource occupancy rate of the upper box exceeds the second preset resource occupancy rate, the pattern embossing features and chamfering features of the upper box are removed to simplify the structure of the upper box.

[0024] Furthermore, when the component is the lower box of the target battery pack, the structure of each component is simplified according to the heat transfer performance and resource occupancy rate corresponding to each component, including:

[0025] Determining whether the heat transfer performance of the lower box exceeds a third preset heat transfer performance;

[0026] When the heat transfer performance of the lower box exceeds the third preset heat transfer performance, determining whether the resource occupancy rate of the lower box exceeds the third preset resource occupancy rate;

[0027] When the resource occupancy rate of the lower box exceeds a third preset resource occupancy rate, the weld features and threaded hole features of the lower box are removed to simplify the structure of the lower box.

[0028] Furthermore, when the component is a module of a target battery pack, the structure of each component is simplified according to the heat transfer performance and resource occupancy rate corresponding to each component, including:

[0029] Determining whether the heat transfer performance of the module exceeds a fourth preset heat transfer performance;

[0030] When the heat transfer performance of the module exceeds the fourth preset heat transfer performance, determining whether the resource occupancy rate of the module exceeds the fourth preset resource occupancy rate;

[0031] When the resource occupancy rate of the module exceeds a fourth preset resource occupancy rate, the hole features and chamfer features of the module are removed to simplify the structure of the module.

[0032] Furthermore, when the component is a battery cell of a target battery pack, the structure of each component is simplified according to the heat transfer performance and resource occupancy rate corresponding to each component, including:

[0033] Determining whether the heat transfer performance of the battery cell exceeds a fifth preset heat transfer performance;

[0034] When the heat transfer performance of the battery cell exceeds the fifth preset heat transfer performance, determining whether the resource occupancy rate of the battery cell exceeds the fifth preset resource occupancy rate;

[0035] When the resource occupancy rate of the battery cell exceeds the fifth preset resource occupancy rate, the edge and corner features, chamfer features, round hole features and rounded corner features of the battery cell are removed, the pole of the battery cell is simplified into a cylinder, and the connecting piece of the battery cell is simplified into a thin body to simplify the structure of the battery cell.

[0036] Furthermore, when the component is a thermal insulation material, a battery system distribution box or a thermal management system of a target battery pack, the method further includes:

[0037] Preserve all the characteristics of each component.

[0038] Further, when the component is a battery control system, a battery management system or a sampling harness of a target battery pack, the method further includes:

[0039] Remove all features from each component.

[0040] In a second aspect, the present application provides a battery pack simulation device, the device comprising:

[0041] An acquisition module, used to acquire the structural characteristics and heat transfer performance of each of the N components of the target battery pack, where N is a positive integer greater than 1;

[0042] A determination module, used to determine the resource occupancy rate of each component during the simulation process according to the structural characteristics of each component;

[0043] A simplification module is used to simplify the structure of each component according to the heat transfer performance and resource occupancy rate corresponding to each component to obtain N components with simplified structures;

[0044] The building module is used to build a simulation model of the target battery pack according to the N components after structural simplification.

[0045] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0046] This application obtains the structural characteristics and heat transfer performance of each component in the target battery pack, determines the resource occupancy rate of each component based on the structural characteristics, determines the simplification method of each component based on the heat transfer performance and resource occupancy rate, and then constructs a simulation model of the target battery pack for the simplified components. On the one hand, it reduces the consumption of computing resources and the solution cycle, and greatly reduces the cost of exploring the insulation effect. On the other hand, it can also obtain simulation results with high credibility based on such a simulation model, and better balances the relationship between the solution cycle and computing resource consumption and the credibility of the insulation simulation results, ensuring that under the premise of having certain computing resources, simulation results with high credibility are obtained within a suitable solution cycle, and the experimental results verify the credibility of the simulation results of this method. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0048] Figure 1 A flowchart of a battery pack simulation method provided in this application;

[0049] Figure 2 A schematic diagram of the positional relationship of various components in a battery pack provided in this application;

[0050] Figure 3 for Figure 2 Schematic diagram of heat transfer paths of various components;

[0051] Figure 4 A schematic diagram of the structure of a battery pack simulation device provided in this application. DETAILED DESCRIPTION

[0052] The embodiment of the present application provides a battery pack simulation method to solve the technical problem in the prior art that it is impossible to balance computing resources and the credibility of simulation results when performing thermal insulation simulation on a battery.

[0053] The technical solution of the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0054] A battery pack simulation method, the method comprising: obtaining the structural characteristics and heat transfer performance of each component of N components of a target battery pack, N being a positive integer greater than 1; determining the resource occupancy rate of each component during the simulation process according to the structural characteristics of each component; simplifying the structure of each component according to the heat transfer performance and resource occupancy rate corresponding to each component to obtain N components with simplified structures; and constructing a simulation model of the target battery pack according to the N components with simplified structures.

[0055] This application obtains the structural characteristics and heat transfer performance of each component in the target battery pack, determines the resource occupancy rate of each component based on the structural characteristics, determines the simplification method of each component based on the heat transfer performance and resource occupancy rate, and then constructs a simulation model of the target battery pack for the simplified components. On the one hand, it reduces the consumption of computing resources and the solution cycle, and greatly reduces the cost of exploring the insulation effect. On the other hand, it can also obtain simulation results with high credibility based on such a simulation model, and better balances the relationship between the solution cycle and computing resource consumption and the credibility of the insulation simulation results, ensuring that under the premise of having certain computing resources, simulation results with high credibility are obtained within a suitable solution cycle, and the experimental results verify the credibility of the simulation results of this method.

[0056] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0057] First of all, the term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0058] In the related art, when performing thermal insulation simulation on a battery pack, it is necessary to first simplify the power battery pack before three-dimensional modeling, and then mesh discretize the model, solve the model, and obtain the simulation results. Among them, when simplifying the process before three-dimensional modeling, the degree of simplification directly affects the number and quality of meshes, which in turn affects the solution cycle and the consumption of computing resources, and ultimately determines the credibility of the thermal insulation simulation results. When the degree of simplification of the components of the battery pack is too high, although the number of networks is relatively small, the quality is relatively high, the solution cycle is short, and the consumption of computing resources is small, the credibility of the thermal insulation simulation results will decrease. When the degree of simplification of the components of the battery pack is too low, although the credibility of the thermal insulation simulation results will increase, the number of meshes is relatively large, the quality is relatively low, the solution cycle is long, and the consumption of computing resources is large. Therefore, it is necessary to balance the relationship between the credibility of the thermal insulation simulation results and the consumption of computing resources.

[0059] In order to balance the relationship between the credibility of the insulation simulation results and the consumption of computing resources, this embodiment provides the following Figure 1 A battery pack simulation method is shown, the method comprising:

[0060] Step S11, obtaining the structural characteristics and heat transfer performance of each of the N components of the target battery pack, where N is a positive integer greater than 1;

[0061] Step S12, determining the resource occupancy rate of each component during the simulation process according to the structural characteristics of each component;

[0062] Step S13, simplifying the structure of each component according to the heat transfer performance and resource occupancy rate corresponding to each component, to obtain N components with simplified structures;

[0063] Step S14, constructing a simulation model of the target battery pack according to the N components after structural simplification.

[0064] By analyzing the structural composition of the target battery pack, the target battery pack can be divided into N components according to actual needs, and the structural characteristics of each of the N components can be determined.

[0065] The level of heat transfer performance will have a great impact on the thermal insulation effect of the battery pack. When the heat transfer performance is good, it means that the heat dissipation of the battery pack is faster. When the battery pack is in a low temperature environment, its energy consumption will increase. When the heat transfer performance is poor, it means that the heat dissipation of the battery pack is slower. When the battery pack is in a low temperature environment, its energy consumption will be relatively lower. Among them, when the heat transfer performance is better (faster heat dissipation) or worse (slower heat dissipation), the influence on the thermal insulation effect is greater. Therefore, for structural components with better or worse heat transfer performance, it is necessary to determine their simplification methods more rigorously.

[0066] The heat transfer performance of each component is related to its structural characteristics, material density, specific heat capacity and thermal conductivity. Therefore, the structural characteristics, material density, specific heat capacity and thermal conductivity of each component in the N components can be obtained, and the heat transfer performance of each component can be determined based on the structural characteristics, material density, specific heat capacity and thermal conductivity of each component.

[0067] Resource occupancy rate refers to the ratio of the computing resource consumption occupied by any one of the N components in the target battery pack (referred to as the target component) to the total computing resource consumption occupied by the N components in the target battery pack during the simulation process. For example, taking the computing cycle as the reference amount of computing resource consumption, the computing resource consumption of a certain target component is 1min, and the total computing resource consumption occupied by the N components is 1000min, then the resource occupancy rate of the target component is 1 / 1000.

[0068] According to the heat transfer performance and resource occupancy rate of each component, the structure of each component can be simplified.

[0069] Specifically, this embodiment uses Figure 2 Taking the structure of the battery pack shown in FIG. 1 as an example, simplified methods for different components are provided as follows. Figure 2 The heat transfer path of the battery pack structure shown is generally as follows Figure 3 shown.

[0070]

Airspace

[0071] When the component is an air space inside the target battery pack, determining whether the heat transfer performance of the air space exceeds a first preset heat transfer performance;

[0072] When the heat transfer performance of the air domain exceeds the first preset heat transfer performance, determining whether the resource occupancy rate of the air domain exceeds the first preset resource occupancy rate;

[0073] When the resource occupancy rate of the air domain exceeds a first preset resource occupancy rate, the fillet features of the air domain, the cavity features in the end plate, and the threaded hole features are removed to simplify the structure of the air domain.

[0074] The air domain is the space formed by the components of each entity within the battery pack.

[0075] The air domain inside the battery pack is relatively complex and has good heat transfer performance, so it is the most important influencing factor for thermal insulation simulation. In general, the first preset resource occupancy rate of the air domain of the battery pack is high, so it is necessary to make appropriate trade-offs for the air domain. The main air gaps in the package must be completely retained, but small features such as fillets need to be removed. The air domains within the components, such as cavities in the end plates, threaded holes, etc., do not need to be considered. During simulation, the recommended mesh size for the entire air domain is 3-5mm.

[0076]

Upper box

[0077] When the component is an upper box of the target battery pack, determining whether the heat transfer performance of the upper box exceeds a second preset heat transfer performance;

[0078] When the heat transfer performance of the upper box exceeds the second preset heat transfer performance, determining whether the resource occupancy rate of the upper box exceeds the second preset resource occupancy rate;

[0079] When the resource occupancy rate of the upper box exceeds the second preset resource occupancy rate, the pattern embossing features and chamfering features of the upper box are removed to simplify the structure of the upper box.

[0080] As the main component for heat exchange between the battery pack and the external environment, the upper box has a great influence on the thermal insulation effect of the battery pack. However, since the structure of the upper box is relatively neat, the processing is relatively simple. The main features of the upper box are retained, and other features such as pattern embossing and chamfering are eliminated. The recommended grid size is 2-3mm.

[0081]

Lower box

[0082] When the component is a lower box of the target battery pack, determining whether the heat transfer performance of the lower box exceeds a third preset heat transfer performance;

[0083] When the heat transfer performance of the lower box exceeds the third preset heat transfer performance, determining whether the resource occupancy rate of the lower box exceeds the third preset resource occupancy rate;

[0084] When the resource occupancy rate of the lower box exceeds a third preset resource occupancy rate, the weld features and threaded hole features of the lower box are removed to simplify the structure of the lower box.

[0085] The lower box is usually in contact with other parts of the electric vehicle. Therefore, compared with the upper box, the lower box has a greater impact on the thermal insulation effect. In addition, the structure of the lower box is relatively complex. Usually, all details on the heat transfer path must be retained. These features are key factors affecting heat transfer. Some features need to be processed, such as welds, threaded holes, etc. Due to the large size of the lower box, considering the calculation cycle, the recommended mesh size is 3-5mm. It should be noted that the bottom guard plate generally needs to fit completely with the lower box. In special cases, the air domain between the two needs to be considered. The recommended mesh size is 2mm.

[0086]

Module

[0087] When the component is a module of the target battery pack, determining whether the heat transfer performance of the module exceeds a fourth preset heat transfer performance;

[0088] When the heat transfer performance of the module exceeds the fourth preset heat transfer performance, determining whether the resource occupancy rate of the module exceeds the fourth preset resource occupancy rate;

[0089] When the resource occupancy rate of the module exceeds a fourth preset resource occupancy rate, the hole features and chamfer features of the module are removed to simplify the structure of the module.

[0090] The module must maintain close contact with all components in the main heat transfer direction. The chamfers, holes and other features of each component can be simplified as appropriate, but their shape or contact conditions must not be significantly changed.

[0091]

Battery Cell

[0092] When the component is a battery cell of the target battery pack, determining whether the heat transfer performance of the battery cell exceeds a fifth preset heat transfer performance;

[0093] When the heat transfer performance of the battery cell exceeds the fifth preset heat transfer performance, determining whether the resource occupancy rate of the battery cell exceeds the fifth preset resource occupancy rate;

[0094] When the resource occupancy rate of the battery cell exceeds the fifth preset resource occupancy rate, the edge and corner features, chamfer features, round hole features and rounded corner features of the battery cell are removed, the pole of the battery cell is simplified into a cylinder, and the connecting piece of the battery cell is simplified into a thin body to simplify the structure of the battery cell.

[0095] The corner features of the battery cell can be deleted while retaining the main body size, but it needs to be converted into a solid structure. The pole can be simplified into a cylinder of the same diameter. The connecting piece can be simplified into a thin body of the same thickness, removing the round holes and rounded corners. The module cover and other supporting structures are plastic parts, which have very little impact on the overall temperature of the heat transfer process and can be directly simplified or ignored as appropriate. The recommended grid size of the module or battery cell is 2mm.

[0096] [Thermal insulation materials, battery system distribution boxes or thermal management systems]

[0097] When the component is the thermal insulation material of the target battery pack, the battery system distribution box or the thermal management system, all characteristics of each component are retained.

[0098] Thermal insulation materials and heat preservation materials are generally regular and are important components that affect heat transfer. Usually, their characteristics need to be fully preserved. The recommended grid size is 1-2mm.

[0099] BDU (battery system distribution box / box / unit) usually has a greater impact on the heat transfer process, and its body is a large heat source. However, for thermal insulation simulation, the impact of BDU is limited and it can be processed regularly. It should be noted that the air domain inside the BDU needs to be retained, and the recommended mesh size is 2-3mm.

[0100] The thermal management system is the core component of the thermal insulation simulation pre-processing. Its characteristics need to be fully retained, and the fluid domain needs to be extracted to keep the fluid domain and the heat exchange system in full fit. The recommended mesh size for the thermal management system components is 2mm and the fluid domain is 1mm.

[0101]

Battery control system, battery management system or sampling harness

[0102] When the component is a battery control system, a battery management system, or a sampling harness of a target battery pack, all features of each component are removed.

[0103] In thermal insulation simulation, components such as BMS (Battery Management System), BMU (Battery Management Unit), and sampling harness have complex structures and have almost no effect on the thermal insulation analysis results. In order to obtain thermal insulation simulation results with high credibility more efficiently, all the characteristics of these structural parts are usually not considered.

[0104] The inventor used the above solution to simulate the thermal insulation of a new energy passenger car power battery pack, and compared the simulation results with the test results:

[0105] The test environment temperature is -20℃ and the initial temperature of the battery pack is 25℃.

[0106] At the end of the insulation, the battery pack temperature is 0°C, the insulation simulation cooling time is 6.12h, the insulation test cooling time is 5.96h, and the overall error is within 3%, with a very high credibility. It can be seen that the present invention has a good balance between the credibility of the insulation simulation results and the consumption of computing resources.

[0107] In summary, this embodiment obtains the structural characteristics and heat transfer performance of each component in the target battery pack, determines the resource occupancy rate of each component according to the structural characteristics, determines the simplification method of each component according to the heat transfer performance and resource occupancy rate, and then constructs a simulation model of the target battery pack for the simplified components. On the one hand, it reduces the consumption of computing resources and the solution cycle, and greatly reduces the cost of exploring the insulation effect. On the other hand, it can also obtain simulation results with high credibility based on such a simulation model, and better balances the relationship between the solution cycle and the consumption of computing resources and the credibility of the insulation simulation results, ensuring that under the premise of having certain computing resources, a simulation result with high credibility is obtained within a suitable solution cycle, and the experimental results verify the credibility of the simulation results of this method.

[0108] Based on the same inventive concept, this embodiment provides Figure 4 A battery pack simulation device is shown, the device comprising:

[0109] An acquisition module 41 is used to acquire the structural characteristics and heat transfer performance of each component of the N components of the target battery pack, where N is a positive integer greater than 1;

[0110] A determination module 42, for determining the resource occupancy rate of each component during the simulation process according to the structural characteristics of each component;

[0111] A simplification module 43 is used to simplify the structure of each component according to the heat transfer performance and resource occupancy rate corresponding to each component to obtain N components with simplified structures;

[0112] The construction module 44 is used to construct a simulation model of the target battery pack according to the N components after structural simplification.

[0113] The acquisition module 41 is specifically used for:

[0114] Obtaining structural characteristics, material density, specific heat capacity and thermal conductivity of each of the N components;

[0115] The heat transfer performance of each component is determined based on its structural characteristics, material density, specific heat capacity and thermal conductivity.

[0116] The simplified module 43 is further used to: when the component is an air domain inside the target battery pack, determine whether the heat transfer performance of the air domain exceeds a first preset heat transfer performance;

[0117] When the heat transfer performance of the air domain exceeds the first preset heat transfer performance, determining whether the resource occupancy rate of the air domain exceeds the first preset resource occupancy rate;

[0118] When the resource occupancy rate of the air domain exceeds a first preset resource occupancy rate, the fillet features of the air domain, the cavity features in the end plate, and the threaded hole features are removed to simplify the structure of the air domain.

[0119] The simplified module 43 is further used to: when the component is an upper box of the target battery pack, determine whether the heat transfer performance of the upper box exceeds a second preset heat transfer performance;

[0120] When the heat transfer performance of the upper box exceeds the second preset heat transfer performance, determining whether the resource occupancy rate of the upper box exceeds the second preset resource occupancy rate;

[0121] When the resource occupancy rate of the upper box exceeds the second preset resource occupancy rate, the pattern embossing features and chamfering features of the upper box are removed to simplify the structure of the upper box.

[0122] The simplified module 43 is further used to: when the component is a lower box of the target battery pack, determine whether the heat transfer performance of the lower box exceeds a third preset heat transfer performance;

[0123] When the heat transfer performance of the lower box exceeds the third preset heat transfer performance, determining whether the resource occupancy rate of the lower box exceeds the third preset resource occupancy rate;

[0124] When the resource occupancy rate of the lower box exceeds a third preset resource occupancy rate, the weld features and threaded hole features of the lower box are removed to simplify the structure of the lower box.

[0125] The simplified module 43 is further used to: when the component is a module of the target battery pack, determine whether the heat transfer performance of the module exceeds a fourth preset heat transfer performance;

[0126] When the heat transfer performance of the module exceeds the fourth preset heat transfer performance, determining whether the resource occupancy rate of the module exceeds the fourth preset resource occupancy rate;

[0127] When the resource occupancy rate of the module exceeds a fourth preset resource occupancy rate, the hole features and chamfer features of the module are removed to simplify the structure of the module.

[0128] The simplified module 43 is further used to: when the component is a battery cell of the target battery pack, determine whether the heat transfer performance of the battery cell exceeds a fifth preset heat transfer performance;

[0129] When the heat transfer performance of the battery cell exceeds the fifth preset heat transfer performance, determining whether the resource occupancy rate of the battery cell exceeds the fifth preset resource occupancy rate;

[0130] When the resource occupancy rate of the battery cell exceeds the fifth preset resource occupancy rate, the edge and corner features, chamfer features, round hole features and rounded corner features of the battery cell are removed, the pole of the battery cell is simplified into a cylinder, and the connecting piece of the battery cell is simplified into a thin body to simplify the structure of the battery cell.

[0131] The device also includes:

[0132] The feature retention module is used to retain all the features of each component when the component is the thermal insulation material of the target battery pack, the battery system distribution box or the thermal management system.

[0133] The feature removal module is used to remove all features of each component when the component is a battery control system, a battery management system or a sampling harness of a target battery pack.

[0134] Since the electronic device introduced in this embodiment is an electronic device used to implement the information processing method in the embodiment of the present application, based on the information processing method introduced in the embodiment of the present application, a person skilled in the art can understand the specific implementation of the electronic device of the present embodiment and its various variations, so how the electronic device implements the method in the embodiment of the present application is not described in detail here. As long as a person skilled in the art implements the electronic device used by the information processing method in the embodiment of the present application, it belongs to the scope of protection of this application.

[0135] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0136] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0137] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0138] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0139] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0140] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A battery pack simulation method, characterized in that: The method comprises: Obtaining structural characteristics and heat transfer performance of each of N components of a target battery pack, where N is a positive integer greater than 1; According to the structural characteristics of each component, determine the resource occupancy rate of each component during the simulation process; According to the heat transfer performance and resource occupancy rate corresponding to each component, the structure of each component is simplified to obtain the N components with simplified structure; Constructing a simulation model of the target battery pack according to the N components after structural simplification; When the component is the air domain inside the target battery pack, the structural simplification of each component according to the heat transfer performance and resource occupancy rate corresponding to each component includes: Determining whether the heat transfer performance of the air domain exceeds a first preset heat transfer performance; When the heat transfer performance of the air domain exceeds the first preset heat transfer performance, determining whether the resource occupancy rate of the air domain exceeds the first preset resource occupancy rate; When the resource occupancy rate of the air domain exceeds the first preset resource occupancy rate, the rounded corner features of the air domain, the cavity features in the end plate, and the threaded hole features are removed to simplify the structure of the air domain.

2. The method according to claim 1, characterized in that The obtaining of the structural characteristics and heat transfer performance of each component of the N components of the target battery pack includes: Obtaining structural characteristics, material density, specific heat capacity and thermal conductivity of each of the N components; The heat transfer performance of each component is determined based on its structural characteristics, material density, specific heat capacity and thermal conductivity.

3. The method according to claim 1, characterized in that When the component is the upper box of the target battery pack, the structural simplification of each component according to the heat transfer performance and resource occupancy rate corresponding to each component includes: Determining whether the heat transfer performance of the upper box exceeds a second preset heat transfer performance; When the heat transfer performance of the upper box exceeds the second preset heat transfer performance, determining whether the resource occupancy rate of the upper box exceeds the second preset resource occupancy rate; When the resource occupancy rate of the upper box exceeds the second preset resource occupancy rate, the pattern embossing features and chamfering features of the upper box are removed to simplify the structure of the upper box.

4. The method according to claim 1, characterized in that When the component is the lower box of the target battery pack, the structural simplification of each component according to the heat transfer performance and resource occupancy rate corresponding to each component includes: Determining whether the heat transfer performance of the lower box exceeds a third preset heat transfer performance; When the heat transfer performance of the lower box exceeds the third preset heat transfer performance, determining whether the resource occupancy rate of the lower box exceeds the third preset resource occupancy rate; When the resource occupancy rate of the lower box exceeds the third preset resource occupancy rate, the weld features and threaded hole features of the lower box are removed to simplify the structure of the lower box.

5. The method according to claim 1, characterized in that When the component is a module of the target battery pack, the structural simplification of each component according to the heat transfer performance and resource occupancy rate corresponding to each component includes: Determining whether the heat transfer performance of the module exceeds a fourth preset heat transfer performance; When the heat transfer performance of the module exceeds the fourth preset heat transfer performance, determining whether the resource occupancy rate of the module exceeds the fourth preset resource occupancy rate; When the resource occupancy rate of the module exceeds the fourth preset resource occupancy rate, the hole features and chamfer features of the module are removed to simplify the structure of the module.

6. The method according to claim 1, characterized in that When the component is a cell of the target battery pack, the structural simplification of each component according to the heat transfer performance and resource occupancy rate corresponding to each component includes: Determining whether the heat transfer performance of the battery core exceeds a fifth preset heat transfer performance; When the heat transfer performance of the battery cell exceeds the fifth preset heat transfer performance, determining whether the resource occupancy rate of the battery cell exceeds the fifth preset resource occupancy rate; When the resource occupancy rate of the battery cell exceeds the fifth preset resource occupancy rate, the edge and corner features, chamfer features, round hole features and rounded corner features of the battery cell are removed, the pole of the battery cell is simplified into a cylinder, and the connecting sheet of the battery cell is simplified into a thin body to simplify the structure of the battery cell.

7. The method according to claim 1, characterized in that When the component is a thermal insulation material, a battery system distribution box or a thermal management system of the target battery pack, the method further includes: Preserve all the characteristics of each component.

8. The method according to claim 1, characterized in that When the component is a battery control system, a battery management system or a sampling harness of the target battery pack, the method further includes: Remove all features from each component.

9. A battery pack simulation device, characterized in that: The device comprises: An acquisition module, used to acquire the structural characteristics and heat transfer performance of each of the N components of the target battery pack, where N is a positive integer greater than 1; A determination module, used to determine the resource occupancy rate of each component during the simulation process according to the structural characteristics of each component; A simplification module, used to simplify the structure of each component according to the heat transfer performance and resource occupancy rate corresponding to each component, so as to obtain the N components after structural simplification; A construction module, used to construct a simulation model of the target battery pack according to the N components after structural simplification; The simplified module is further used to: when the component is an air domain inside the target battery pack, determine whether the heat transfer performance of the air domain exceeds a first preset heat transfer performance; When the heat transfer performance of the air domain exceeds the first preset heat transfer performance, determining whether the resource occupancy rate of the air domain exceeds the first preset resource occupancy rate; When the resource occupancy rate of the air domain exceeds a first preset resource occupancy rate, the fillet features of the air domain, the cavity features in the end plate, and the threaded hole features are removed to simplify the structure of the air domain.

Images