End plate model generation method, processing device, battery module end plate and battery module

Abstract

The invention provides an end plate model generation method, a processing device, a battery module end plate and a battery module. The end plate model generation method comprises the steps of obtaining the size of a to-be-generated end plate model, and generating an initial model matched with the size of the to-be-generated end plate model; performing basic structure processing on the initial model according to an end plate target function to obtain a first model; the first model is subjected to structure enhancement processing, a second model is obtained, and the structural strength of the second model is not smaller than preset strength; adding a construction structure to the second model to obtain a third model; performing simulation verification on the third model, and outputting a simulation result; and modifying the third model according to a simulation result to obtain an end plate model. According to the method, the end plate is gradually designed and simulated, verified and modified, so that the design of the end plate model is systematized, various factors of the design of the end plate model are considered as much as possible, and the risk of later mold repair is reduced.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to an end plate model generation method, a processing device, a battery module end plate and a battery module. Background Art

[0002] The module end plates of energy storage battery packs are generally die-cast. Die-casting is closely related to the design of the mold and is difficult to design. As a result, the end plate designs in the industry are basically iterative upgrades based on the structure of the previous generation of products. For example, if the structural mass of the previous generation of products is too heavy, then the upgrade of the next generation of products will be based on the structure of the previous generation of products. Weight-reducing holes or other weight-reducing methods will be opened. Such a design may ignore some factors, such as unreasonable positioning of weight-reducing holes leading to component interference, unreasonable number of holes leading to insufficient strength, etc. Especially if these problems are discovered during the production stage or after production is completed, they will lead to subsequent mold repairs and increase mold costs. Summary of the invention

[0003] In view of this, the present application provides an end plate model generation method, a processing device, a battery module end plate and a battery module, so as to improve the problem that the end plate model generation method is not systematic enough, resulting in frequent mold repairs.

[0004] The technical solution adopted by this application to solve the above technical problems is:

[0005] In a first aspect, the present application provides a method for generating an end plate model, comprising:

[0006] Acquire the size of the end plate model to be generated, and generate an initial model matching the size of the end plate model to be generated;

[0007] Performing basic structural processing on the initial model according to the end plate target function to obtain a first model;

[0008] Performing structural enhancement processing on the first model to obtain a second model, wherein the structural strength of the second model is not less than a preset strength;

[0009] Adding an engineering structure to the second model to obtain a third model;

[0010] Performing simulation verification on the third model and outputting simulation results;

[0011] According to the simulation results, the third model is modified to obtain an end plate model.

[0012] In some embodiments of the present application, the step of performing basic structure processing on the initial model according to the end plate target function to obtain the first model includes:

[0013] Obtaining the size and quantity of the preset binding straps, and providing the initial model with limiting grooves for binding the binding straps;

[0014] Opening a plurality of installation positioning holes on the initial model;

[0015] A glue overflow groove is formed on one end surface of the initial model to obtain the first model.

[0016] In some embodiments of the present application, the width of the limiting groove is greater than the width of the strap, and the difference between the width of the limiting groove and the width of the strap is in the range of 0.5 mm to 1.5 mm; the depth of the limiting groove is equal to the thickness of the strap.

[0017] In some embodiments of the present application, the glue overflow groove is in a U-shape along the edge of the end surface, the depth of the glue overflow groove ranges from 1 mm to 1.5 mm, and the width of the glue overflow groove ranges from 2.5 mm to 3.5 mm.

[0018] In some embodiments of the present application, the step of performing structural enhancement processing on the first model to obtain the second model includes:

[0019] A reinforcing rib structure is formed on the first model to obtain the second model.

[0020] In some embodiments of the present application, the step of adding a construction structure to the second model to obtain a third model includes:

[0021] According to the preset parameters of the automatic hoisting holes, a plurality of first hoisting holes are formed on the second model;

[0022] According to the preset parameters of the manual lifting holes, a plurality of second lifting holes are formed on the second model to obtain the third model.

[0023] In some embodiments of the present application, the step of simulating and verifying the third model, outputting simulation results, and modifying the third model according to the simulation results to obtain the end plate model includes:

[0024] Importing the design parameters of the third model into simulation software to establish a simulation model;

[0025] According to the preset constraints, verify whether the simulation model meets the design requirements;

[0026] If the design requirements are met, the end plate model is output; if the design requirements are not met, the data indicating that the simulation model does not meet the design requirements is output, and the simulation model is modified according to the data, and then the simulation model is re-verified whether it meets the design requirements, and this cycle is repeated until the simulation model meets the design requirements and the end plate model is output.

[0027] In some embodiments of the present application, the design parameters include the size and position of the limit groove, the size and position of the installation positioning hole, the size and position of the glue overflow groove, the size and position of the reinforcing rib, the size and position of the first lifting hole and the second lifting hole, the size, tensile strength, yield strength and elastic modulus of the third model.

[0028] In some embodiments of the present application, the step of verifying whether the simulation model meets the design requirements according to the preset constraint conditions includes:

[0029] According to the design parameters of the simulation model, determining whether the design parameters meet the preset constraint conditions;

[0030] If satisfied, the simulation model is calculated, and the Mises stress and maximum displacement of the simulation model are output;

[0031] Based on the Mises stress and maximum displacement of the simulation model, it is verified whether the simulation model meets the design requirements.

[0032] In some embodiments of the present application, the preset constraint condition includes a first constraint condition, a second constraint condition and a third constraint condition;

[0033] The first constraint condition is whether the preload force of the battery module installed through the installation positioning hole in the simulation model is within the range of the preset preload force;

[0034] The second constraint condition is whether the design parameters of the simulation model are all within a preset design parameter range;

[0035] The third constraint condition is whether the expansion force range and deformation range of the battery cell are within the force range and deformation range of the simulation model.

[0036] In some embodiments of the present application, before the step of simulating and verifying the third model and outputting the simulation result, the following steps are further included:

[0037] forming a weight-reducing structure on the third mold;

[0038] The corners of the third model are rounded or chamfered.

[0039] In a second aspect, an embodiment of the present application provides an end plate model processing device, comprising:

[0040] An acquisition generation module is used to acquire the size of the end plate model to be generated, and generate an initial model matching the size of the end plate model to be generated;

[0041] A first model generation module, configured to perform basic structure processing on the initial model according to the end plate target function to obtain a first model;

[0042] A second model generating module, used for performing structural enhancement processing on the first model to obtain a second model, wherein the structural strength of the second model is not less than a preset strength;

[0043] A third model generating module, used for adding a construction structure to the second model to obtain a third model;

[0044] A simulation verification module, used for performing simulation verification on the third model and outputting simulation results;

[0045] A modification module is used to modify the third model according to the simulation results to obtain an end plate model.

[0046] In the third aspect, an embodiment of the present application provides a battery module end plate, comprising a plate body, a first side portion and a second side portion, wherein the two sides of the plate body are respectively connected to the first side portion and the second side portion, a glue overflow groove is formed on the first end surface of the plate body, and a plurality of first lifting holes, a plurality of weight reducing grooves and a plurality of reinforcing ribs are provided on the second end surface of the plate body, wherein the plurality of weight reducing grooves and the plurality of first lifting holes are connected by the plurality of reinforcing ribs, and the second end surface is arranged opposite to the first end surface, and the first side portion and the second side portion are both provided with installation positioning holes, and the two installation positioning holes respectively penetrate the first side portion and the second side portion along the width direction of the battery module end plate, and a second lifting hole is provided on the side of the first side portion and the second side portion which are arranged opposite to the first end surface, and a plurality of limit grooves are provided on the first side portion and the second side portion.

[0047] In a fourth aspect, an embodiment of the present application provides a battery module, comprising the battery module end plate as described in the third aspect.

[0048] In summary, due to the adoption of the above technical solution, this application has at least the following beneficial effects:

[0049] The present application provides an end plate model generation method, a processing device, a battery module end plate and a battery module. The end plate model generation method makes the design of the end plate model systematic by performing step-by-step design processing, simulation verification and model modification on the end plate, taking into account various factors of the end plate design as much as possible, and reducing the risk of later mold modification. In detail, firstly, the size of the end plate model to be generated is obtained, and an initial model matching the size of the end plate model to be generated is generated to prevent the initial model from being too different from the end plate model to be generated, which leads to subsequent design troubles. Then, the initial model is processed with the basic structure according to the target function of the end plate to obtain the first model. At this time, the general structure of the end plate model is basically obtained, and the functional structure of the end plate is designed according to the actual situation to reduce the possibility of missing the functional structure, and avoid the mold modification caused by the need to add the functional structure in the later stage, which increases the cost. Then, based on the first model, the first model is subjected to structural enhancement processing according to the strength requirements to obtain the second model, so as to ensure that the strength of the second model can meet the preset strength. Then, the second model is added with a construction structure to obtain the third model, so that the third model can adapt to the construction needs of hoisting. Then the third model is simulated and verified to check whether there are any problems with the third model, and the simulation results are obtained. Finally, according to the simulation results, the third model is structurally modified to further ensure that the final end plate can meet the overall function, construction and strength requirements, and avoid the later appearance of the end plate design being unqualified or there are omissions of functions or other needs, resulting in mold repair. In summary, by adopting the above-mentioned end plate model generation method, the function, structural strength, construction structure and other aspects of the end plate are considered as comprehensively as possible, so that the end plate can be designed in detail according to the systematic process, improve the efficiency of the system operation and the comprehensiveness of the end plate design, reduce the possibility of later mold repair, and thus reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A schematic diagram of a flow chart of a method for generating an end plate model provided in an embodiment of the present application;

[0051] Figure 2 A schematic diagram of an end face model generating device provided in an embodiment of the present application;

[0052] Figure 3 A schematic diagram of the structure of a battery module end plate provided in an embodiment of the present application (first perspective);

[0053] Figure 4 A schematic diagram of the structure of a battery module end plate provided in an embodiment of the present application (second viewing angle);

[0054] Figure 5 This is a schematic diagram of the structure of a battery module provided in an embodiment of the present application.

[0055] Description of reference numerals:

[0056] 1. Battery module; 11. Battery module end plate; 111. Plate body; 1111. First end face; 1112. Glue overflow groove; 1113. Second end face; 1114. First lifting hole; 1115. Weight reduction groove; 1116. Reinforcement rib; 112. First side portion; 113. Second side portion; 114. Second lifting hole; 115. Limiting groove; 116. Installation positioning hole; 12. Battery cell; 13. Binding strap;

[0057] 301, acquisition generation module; 302, first model generation module; 303, second model generation module; 304, third model generation module; 305, simulation verification module; 306, modification module. DETAILED DESCRIPTION

[0058] In the description of this application, it should be understood that the words "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

[0060] See also Figure 1 , an embodiment of the present application provides a method for generating an end plate model, comprising:

[0061] S1. Obtain the size of the end plate model to be generated, and generate an initial model that matches the size of the end plate model to be generated.

[0062] It should be noted that the size of the end plate model to be generated is generally determined according to the size and shape of the battery cell to ensure that the shape and size of the end plate model to be generated can match the shape and size of the battery cell, so as to facilitate the use of the end plate to fix multiple battery cells. After obtaining the size of the end plate model to be generated, first, obtain the size of the end plate model to be generated, and generate an initial model that matches the size of the end plate model to be generated. In other words, the initial model can be simply understood as a three-dimensional geometric model that matches the size of the battery cell. The role of this model is to provide a basic framework for subsequent design steps to ensure that the end plate can accurately fit the battery cell. In this embodiment, the initial model is a cube with a thickness less than the width and length.

[0063] S2. Perform basic structural processing on the initial model according to the end plate target function to obtain the first model.

[0064] In the basic structure design, it is necessary to consider the functions that the end plate is to achieve. For example, if the battery cell needs to be fixed on the end plate within a certain range, a limit groove can be opened on the surface of the initial model. This design can ensure the stable installation of the battery cell on the end plate. At the same time, considering the functional requirements of the battery cell such as heat dissipation and glue overflow, the corresponding glue overflow groove and other structures are added to the design. The limit groove is mainly for binding with straps, so that the straps can be fixed in the limit groove and bind multiple battery cells and end plates, thereby obtaining a battery module with multiple battery cells.

[0065] S3. Perform structural enhancement processing on the first model to obtain a second model, wherein the structural strength of the second model is not less than a preset strength.

[0066] The structural strength design is to ensure that the end plate can withstand certain mechanical stress without deformation or damage. By performing finite element analysis and other methods on the first model, the stress distribution in use is determined, and reinforcing ribs and other structures are added to the stress concentration area to enhance the strength. This enhanced design can ensure that the end plate has sufficient compressive and bending strength in actual use.

[0067] S4. Add an engineering structure to the second model to obtain a third model.

[0068] After the structural strength meets the requirements, the convenience of the end plate during production, transportation and installation also needs to be considered. For example, in order to facilitate automatic lifting, lifting holes can be opened on the end plate. The position and number of these holes need to be reasonably designed according to the size and weight of the end plate to ensure safety and reliability during construction.

[0069] S5. Perform simulation verification on the third model and output simulation results.

[0070] S6. According to the simulation results, the third model is modified to obtain an end plate model.

[0071] Step S5 is to use simulation software to simulate the third model. By applying loads under actual working conditions to the model, it is verified whether the design meets the expected requirements. Step S6 is that if the simulation results show that some parts of the model are insufficient in strength or have structural problems, it is necessary to return to the previous steps to optimize and adjust the model until the simulation results meet the preset requirements.

[0072] The technical solution provided by the present application makes the design of the end plate model systematic by performing step-by-step design processing, simulation verification and model modification on the end plate, taking into account various factors of the end plate design as much as possible, and reducing the risk of later mold modification. In detail, first obtain the size of the end plate model to be generated, and generate an initial model that matches the size of the end plate model to be generated, so as to prevent the initial model from being too different from the end plate model to be generated, which will cause trouble in subsequent design. Then, the initial model is processed with the basic structure according to the target function of the end plate to obtain the first model. At this time, the general structure of the end plate model is basically obtained, and the functional structure of the end plate is designed according to the actual situation to reduce the possibility of missing the functional structure and avoid the mold modification caused by the need to add the functional structure in the later stage, which increases the cost. Then, based on the first model, the first model is structurally enhanced according to the strength requirements to obtain the second model, ensuring that the strength of the second model can meet the preset strength. Then, the construction structure is added to the second model to obtain the third model, so that the third model can adapt to the construction needs of hoisting. Then the third model is simulated and verified to check whether there are any problems with the third model, and the simulation results are obtained. Finally, according to the simulation results, the third model is structurally modified to further ensure that the final end plate can meet the overall function, construction and strength requirements, and avoid the later appearance of the end plate design being unqualified or there are omissions of functions or other needs, resulting in mold repair. In summary, by adopting the above-mentioned end plate model generation method, the function, structural strength, construction structure and other aspects of the end plate are considered as comprehensively as possible, so that the end plate can be designed in detail according to the systematic process, improve the efficiency of the system operation and the comprehensiveness of the end plate design, reduce the possibility of later mold repair, and thus reduce costs.

[0073] In some embodiments, the step of performing basic structure processing on the initial model according to the end plate target function to obtain the first model includes:

[0074] The preset size specifications and quantity of the straps are obtained, and limiting grooves for the straps to be bound are opened on the initial model.

[0075] Furthermore, the width of the limiting groove is greater than the width of the binding strap, and the difference between the width of the limiting groove and the width of the binding strap is in the range of 0.5 mm to 1.5 mm; the depth of the limiting groove is equal to the thickness of the binding strap.

[0076] First, the width, thickness, and number of straps need to be determined. Assuming the width of the strap is 30 mm and the thickness is 2 mm, two straps are required for each battery module. According to the size of the strap, limit slots are opened at appropriate locations of the initial model. The width of the limit slot is designed to be slightly larger than the width of the strap, for example 31 mm, to ensure that the strap can smoothly enter the slot without being too tight to cause damage or too loose to cause inability to fix. The depth of the limit slot is designed to be 2 mm, which is consistent with the thickness of the strap, ensuring that the strap can be embedded in the slot and provide a stable fixation effect.

[0077] A plurality of mounting positioning holes are opened on the initial model.

[0078] The installation positioning holes are to ensure the precise positioning of the battery module during installation. According to the size of the battery cell and the design requirements of the end plate, positioning holes are usually opened at the four corners or the middle of the initial model. In this embodiment, installation positioning holes are opened at the four corners of the initial model, and the installation positioning holes pass through the initial model. Assuming that the length of the initial model is 200mm, the width is 180mm, and the thickness is 30mm, the installation positioning holes are arranged on one side of the width direction of the initial model, and the installation positioning holes pass through the thickness of the initial model in the width direction. The aperture of the installation positioning hole is 9mm, which is suitable for M8 bolts. The relative distance between the two installation positioning holes is determined according to the actual installation position of the battery module. The hole wall thickness of the installation positioning hole is not less than 3mm, so that the installation positioning hole has sufficient safety pre-tightening thickness.

[0079] A glue overflow groove is formed on one end face of the initial model to obtain a first model. The end face with the glue overflow groove is mainly used to contact the battery cell. When the end plate squeezes the battery cell to fix the battery cell, the glue overflow groove can prevent the glue from overflowing to the outside of the end plate due to squeezing.

[0080] Furthermore, the glue overflow groove is in a U-shape along the edge of the end surface, the depth of the glue overflow groove ranges from 1 mm to 1.5 mm, and the width of the glue overflow groove ranges from 2.5 mm to 3.5 mm.

[0081] The purpose of the glue overflow groove is to ensure that the glue does not overflow and affect the functions of other components during the installation of the battery cell. By designing a U-shaped glue overflow groove on the edge of the end face where the battery cell contacts the end plate, excess colloid can be effectively controlled. Assuming that the width of the glue overflow groove is 3mm, the depth is 1.5mm, and the range of the glue overflow groove that shrinks according to the length and width of the battery cell is 15mm to 20mm, when the end plate is in squeeze contact with the battery cell, the glue overflow groove opened on the end plate is located on the inner side of the edge of the battery cell, and the glue overflow groove is 15mm to 20mm away from the edge of the battery cell. In this embodiment, the glue overflow groove is 20mm away from the edge of the battery cell. It is opened around the contact end face of the battery cell to form a U-shaped structure to ensure that during the installation process, all excess glue is concentrated in the glue overflow groove and does not flow to other unnecessary areas.

[0082] Furthermore, the corners of the overflow glue groove are chamfered so that the four corners of the overflow glue groove are all arc-shaped, so that the glue at the corners of the overflow glue groove can be better transitioned, thereby improving the ability of the corners of the overflow glue groove to accommodate glue.

[0083] In some embodiments, the step of performing structural enhancement processing on the first model to obtain the second model includes:

[0084] A reinforcing rib structure is formed on the first model to obtain a second model.

[0085] In the design of the battery module end plate, ensuring the strength of the structure is the key. By simulating the stress conditions of the first model in actual use and calculating the stress of the first model, the weak points or stress concentration areas of the first model structure are output. Then, by adding a reinforcing rib structure in these areas, the stress can be effectively dispersed and the overall strength of the end plate can be improved. This design can not only prevent deformation or damage caused by mechanical stress, but also ensure that the end plate remains stable and reliable during long-term use. In detail, first, the stress conditions of the first model are simulated, and finite element analysis or other simulation tools are usually used to simulate the actual working conditions of the end plate in use. These working conditions may include mechanical loads, vibrations, temperature changes, etc. Through simulation calculations, the stress concentration areas in the model can be calculated, that is, in these areas, the stress borne by the material exceeds that of other parts, which may cause deformation or damage. According to the results of the simulation calculation, reinforcing ribs are designed in the stress concentration areas. The reinforcing ribs are usually convex or groove structures added along the end face or weak area of ​​the model, the purpose of which is to disperse or transfer stress by increasing the material thickness or changing the material distribution. The specific shape and size of the reinforcing ribs depend on the simulation calculation results of the stress. For example, if the stress concentration area is a linear area, it may be necessary to design a strip-shaped reinforcement rib; if the stress is concentrated at a certain point, it may be necessary to thicken the material near the point or design a grid-shaped reinforcement structure.

[0086] In this embodiment, a strip reinforcement rib with a thickness of 2 mm is designed for the stress concentration area, and multiple reinforcement ribs are arranged on the end face of the first model away from the battery cell, and multiple reinforcement ribs are connected to each other to form a continuous reinforcement structure. Through this design, the stress concentration degree of the end face can be significantly reduced, thereby improving the compressive strength of the entire first model, and obtaining the second model.

[0087] In some embodiments, the step of adding a construction structure to the second model to obtain a third model includes:

[0088] According to the preset parameters of the automatic lifting holes, a plurality of first lifting holes are formed on the second model;

[0089] According to the preset parameters of the manual lifting holes, a plurality of second lifting holes are formed on the second model to obtain a third model.

[0090] In the design of the battery module end plate, considering the actual construction and installation needs, it is necessary to design lifting holes for the end plate so that the battery module can be safely and conveniently moved and positioned during production, transportation and installation. Automatic lifting holes are suitable for mechanized operations, while manual lifting holes are used for manual operations. Designing these two types of lifting holes on the same end plate can make the end plate have good lifting adaptability in different scenarios.

[0091] Automatic lifting holes are usually used for mechanized handling and installation. First, the weight and size of the end plate need to be determined in order to design lifting holes of appropriate size and position. Assuming that the weight of the second model is 50kg, two automatic lifting holes need to be designed on the upper part of the second model. The diameter of each lifting hole can be designed to be 20mm, or other sizes, as long as the lifting hole can adapt to the size of the lifting equipment. The position of the hole needs to be symmetrical on the end plate to maintain balance during automatic lifting. These lifting holes will be connected to the mechanical lifting equipment to ensure that the end plate is stable during handling and installation. In this embodiment, the first lifting hole is located in the middle of the end face of the second model away from the battery cell, and multiple first lifting holes are symmetrically arranged to ensure the balance of the end plate during lifting.

[0092] The manual lifting holes are mainly used for manual handling. They are usually designed on the end face of the second model away from the battery cell, and are located at the edge of the end face or designed on both sides of the second model to facilitate manual operation by workers. Two manual lifting holes are designed on both sides of the end plate, and the diameter of the holes can be designed to be 15mm. The location of the manual lifting holes should take into account the comfort and safety of workers during handling. They are usually placed in the middle of both sides of the end plate to facilitate workers to hold with both hands or connect with tools. When designing these holes, the mechanical balance of workers during handling must also be considered to ensure that the end plate is not easily tilted or flipped.

[0093] In some embodiments, the step of simulating and verifying the third model, outputting simulation results, and modifying the third model according to the simulation results to obtain the end plate model includes:

[0094] The design parameters of the third model are imported into the simulation software to establish a simulation model.

[0095] First, the design parameters of the third model need to be input into the simulation software. These parameters usually include the physical properties of the material (such as density, elastic modulus, yield strength, etc.), geometric dimensions (such as thickness, aperture, etc.) and boundary conditions (such as fixed support points, force positions, etc.). In this embodiment, the design parameters include the size and position of the limit groove, the size and position of the installation positioning hole, the size and position of the overflow groove, the size and position of the reinforcing rib, the size and position of the first lifting hole and the second lifting hole, the size, tensile strength, yield strength and elastic modulus of the third model.

[0096] Through these parameters, the simulation software can generate a three-dimensional simulation model, which can simulate various working conditions on the computer and reflect the stress, deformation and other performance indicators in actual use.

[0097] According to the preset constraints, verify whether the simulation model meets the design requirements.

[0098] Pre-constraints are set in the simulation software, which may include loads, temperature changes, vibration frequencies, etc., and then simulations are run to calculate the stress distribution, displacement changes, and other data of the model under these conditions. Through simulation verification, it can be determined whether the third model meets the design requirements. For example, if the simulation results show that the stress value in certain areas exceeds the yield strength of the material, it means that the structural strength of the area is insufficient and structural optimization is required.

[0099] In this embodiment, the step of verifying whether the simulation model meets the design requirements according to the preset constraint conditions includes:

[0100] According to the design parameters of the simulation model, it is determined whether the design parameters meet the preset constraints.

[0101] Furthermore, the preset constraints include a first constraint, a second constraint and a third constraint; the first constraint is whether the preload force of the battery module installed through the installation positioning hole in the simulation model is within the preset preload force range; the second constraint is whether the design parameters of the simulation model are all within the preset design parameter range; the third constraint is whether the expansion force range and deformation range of the battery cell are within the force range and deformation range of the simulation model.

[0102] First, input the design parameters of the simulation model, including the size and position of the limit groove, the size and position of the installation positioning hole, the size and position of the overflow groove, the size and position of the reinforcing rib, the size and position of the first lifting hole and the second lifting hole, the size, tensile strength, yield strength and elastic modulus of the third model. These parameters are set in the early design and simulation model establishment stage. Verify whether these design parameters are within the preset constraints. For example, the yield strength of the material must be greater than a preset value, the geometric dimensions must be within the specified tolerance range, and the boundary conditions must meet the requirements of the actual application scenario. If the design parameters do not meet these conditions, the model may not perform as expected in actual applications. In this embodiment, the preload range of the battery module fixed by the installation positioning hole and bolt is 18Nm to 20Nm, so M8 steel bolts are used to fix the installation positioning hole, and the preload force of the M8 steel bolts fixed to the installation positioning hole is 20Nm. The strap is a steel strap, and the physical parameters between it and the third model are set as follows: the strap is a SUS201 stainless steel strap, with a tensile strength of 1350MPa, a yield strength of 1050MPa, and an elastic modulus of 200GPa; the tensile strength of the third model is 240MPa, the yield strength is 160MPa, and the elastic modulus is 71GPa.

[0103] If satisfied, the simulation model is calculated and the Mises stress and maximum displacement of the simulation model are output.

[0104] If the design parameters are verified, the simulation can be run. The simulation software will calculate the mechanical response of the model based on the set design parameters. Among them, Mises stress is a stress criterion widely used in structural mechanics to determine the strength of materials under complex stress states. The maximum displacement reflects the degree of deformation of the model under load. These results can intuitively reflect the stress and deformation of the model under actual working conditions.

[0105] According to the Mises stress and maximum displacement of the simulation model, it is verified whether the simulation model meets the design requirements.

[0106] After the simulation is completed, the Mises stress and maximum displacement of the model are extracted and compared with the preset design requirements. If the Mises stress exceeds the yield strength of the material, or the maximum displacement exceeds the allowable deformation range, it indicates that the model may fail in actual use and needs further optimization.

[0107] If the design requirements are met, the end plate model is output; if the design requirements are not met, the data that the simulation model does not meet the design requirements is output, and the simulation model is modified according to the data, and then the simulation model is re-verified whether it meets the design requirements. This cycle is repeated until the simulation model meets the design requirements and the end plate model is output.

[0108] In detail, if the simulation results do not meet the design requirements, it is necessary to analyze the root cause of the problem and perform structural optimization. For example, the performance of the model can be improved by adjusting the distribution of materials, adding reinforcing ribs, or changing the geometric shape. For example, after discovering that the stress in the middle area of ​​the end face of the third model that deviates from the battery cell is concentrated, consider adding reinforcing ribs in this area, while reducing the material thickness at the edge to balance the weight, and perform simulation verification again. The results show that the stress distribution is uniform, the maximum stress is reduced to 60% of the yield strength, and the deformation is also within an acceptable range. After the structural optimization is completed, perform simulation verification again to ensure that the modified model can meet the design requirements under all preset conditions. If it still does not meet the requirements, continue to optimize until the simulation results meet the expected goals.

[0109] This embodiment establishes a simulation model and uses computer simulation technology to simulate the mechanical behavior and performance of the end plate under actual working conditions in a virtual environment. Simulation verification can help identify potential problems in model design, such as insufficient strength and excessive deformation, and then further improve the design through structural optimization, thereby reducing the trial and error cost in the actual manufacturing process and improving design efficiency and product quality.

[0110] In some embodiments, before the step of simulating and verifying the third model to obtain a simulation result, the method further includes:

[0111] forming a weight-reducing structure on the third model;

[0112] The corners of the third model are rounded or chamfered.

[0113] According to the actual situation, the requirements of the third model for weight and shape are known. For example, if the third model is a cube with multiple corners, the corners of the third model can be rounded or chamfered to improve the processing technology of the third model and reduce stress concentration points. By rounding or chamfering the corners of the third model, not only can stress concentration be reduced, but also the overall appearance can be improved and the processing difficulty can be reduced. For example: according to the current weight requirements of the third model and its actual weight, the third model is reduced in material to reduce its weight. Of course, when reducing the weight of the third model, the three constraints mentioned above need to be considered, that is, while reducing the weight of the third model, the constraints need to be met. The weight reduction can be specifically achieved by opening a weight reduction groove, combined with the setting of reinforcing ribs, multiple weight reduction grooves can be opened on the end face of the third model away from the battery cell, and then reinforcing ribs are set between adjacent weight reduction grooves to compensate for the strength reduction caused by the opening of the weight reduction grooves.

[0114] See also Figure 2 , an embodiment of the present application provides an end plate model processing device, comprising:

[0115] An acquisition generation module 301 is used to acquire the size of the end plate model to be generated, and generate an initial model matching the size of the end plate model to be generated;

[0116] A first model generation module 302 is used to perform basic structure processing on the initial model according to the end plate target function to obtain a first model;

[0117] The second model generation module 303 is used to perform structural enhancement processing on the first model to obtain a second model, wherein the structural strength of the second model is not less than a preset strength;

[0118] A third model generation module 304 is used to add a construction structure to the second model to obtain a third model;

[0119] A simulation verification module 305 is used to perform simulation verification on the third model and output simulation results;

[0120] The modification module 306 is used to modify the third model according to the simulation results to obtain the end plate model.

[0121] See also Figure 3 and Figure 4 The embodiment of the present application provides a battery module end plate 11. The battery module end plate 11 includes a plate body 111, a first side portion 112 and a second side portion 113. The two sides of the plate body 111 are respectively connected to the first side portion 112 and the second side portion 113. The first end surface 1111 of the plate body 111 for contacting the battery cell 12 is formed with a glue overflow groove 1112. The second end surface 1113 of the plate body 111 is provided with a plurality of first hoisting holes 1114, a plurality of weight-reducing grooves 1115 and a plurality of reinforcing ribs 1116. The plurality of reinforcing ribs 1116 connect the plurality of weight-reducing grooves 1115, and the plurality of first hoisting holes 1114 are connected to the plurality of weight-reducing grooves 1115. 14 is connected, the second end face 1113 is arranged opposite to the first end face 1111, the first side portion 112 and the second side portion 113 are both provided with installation positioning holes 116, and the two installation positioning holes 116 respectively penetrate the first side portion 112 and the second side portion 113 along the width direction of the battery module end plate 11, the first side portion 112 and the second side portion 113 are both provided with second lifting holes 114 on the sides opposite to the first end face 1111, and the first side portion 112 and the second side portion 113 are both provided with a plurality of limiting grooves 115.

[0122] The plate body 111 is the main structure of the end plate, which is usually made of high-strength metal materials, such as aluminum alloy, to ensure that it has sufficient strength and durability. The first side portion 112 and the second side portion 113 are connected to the two sides of the plate body 111, respectively. These two sides not only enhance the structural integrity of the end plate, but also provide space and support for the subsequent design of the limit groove 115 and the installation positioning hole 116. The overflow glue groove 1112 is located on the first end surface 1111 of the plate body 111, and is distributed in a round shape or other closed shapes along the edge of the end surface. The groove is used to control the overflow of glue when the battery cell 12 is installed to prevent excess glue from affecting other components or electrical connections. The design of the overflow glue groove 1112 needs to take into account the size of the battery cell 12 and the characteristics of the glue. The groove width is usually 2.5mm to 3.5mm and the depth is 1mm to 1.5mm. The first hoisting hole 1114 is set on the second end surface 1113 of the plate body 111 for mechanized hoisting. It is usually designed as a circular hole with a larger diameter to meet the connection requirements of the hoisting equipment. The second hoisting hole 114 is arranged on the opposite side of the first side portion 112 and the second side portion 113 for manual hoisting. The weight-reducing groove 1115 is located on the second end surface 1113 of the plate body 111. The plurality of weight-reducing grooves 1115 are generally formed in a grid shape to reduce the overall weight of the end plate while maintaining sufficient structural strength. The reinforcing rib 1116 connects the plurality of first hoisting holes 1114 and the weight-reducing groove 1115, and is generally arranged along the force direction of the plate body 111 to disperse the stress during hoisting and prevent the plate body 111 from bending or deforming. The width and thickness of the reinforcing rib 1116 need to be designed according to the material of the plate body 111 and the expected force conditions. The installation positioning hole 116 passes through the first side portion 112 and the second side portion 113 along the width direction of the plate body 111 to ensure that the battery module 1 can be accurately positioned and fixed during installation. The limiting groove 115 is generally opened on the first side portion 112 and the second side portion 113 to fix the strap 13 to prevent the strap 13 from falling due to gravity.

[0123] See also Figure 5, an embodiment of the present application provides a battery module 1, comprising a plurality of battery cells 12, a plurality of binding straps 13 and two battery module end plates 11 as described in the above embodiments. The two battery module end plates 11 are arranged opposite to each other, the plurality of battery cells 12 are arranged between the two battery module end plates 11, and the adjacent battery cells 12 are in contact with each other, and the first end surface 1111 of the battery module end plate 11 is in contact with the battery cell 12. The binding strap 13 surrounds the battery module end plate 11 and the plurality of battery cells 12 so that the battery module end plate 11 and the battery cell 12 are located in a ring surrounded by the binding strap 13, and the binding strap 13 contacts and squeezes the battery module end plate 11 and the battery cell 12 so that the battery module end plate 11 and the plurality of battery cells 12 can be bound into one module. When the strap 13 is binding the battery module end plate 11, the portion of the strap 13 that contacts the battery module end plate 11 is disposed in the limiting groove 115, which is used to limit the movement of the strap 13 along the width direction of the battery module end plate 11, thereby strengthening the binding effect and preventing the strap 13 from sliding down under the action of gravity.

[0124] In another embodiment, the battery module includes multiple battery cells 12, multiple straps 13 and two battery module end plates 11 prepared using the end plate model generation method described in the previous embodiment. The structure of the battery module 1 is the same as that of the battery module of the previous embodiment and will not be repeated here.

[0125] The present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or multiple times in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0126] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more application embodiments, in the above description of the embodiments of this application, multiple features are sometimes merged into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

Claims

1. A method for generating an end plate model, characterized in that: include: Acquire the size of the end plate model to be generated, and generate an initial model matching the size of the end plate model to be generated; Performing basic structural processing on the initial model according to the end plate target function to obtain a first model; Performing structural enhancement processing on the first model to obtain a second model, wherein the structural strength of the second model is not less than a preset strength; Adding an engineering structure to the second model to obtain a third model; Performing simulation verification on the third model and outputting simulation results; According to the simulation results, the third model is modified to obtain an end plate model.

2. The end plate model generation method according to claim 1, characterized in that: The step of performing basic structure processing on the initial model according to the end plate target function to obtain the first model comprises: Obtaining the size and quantity of the preset binding straps, and providing the initial model with limiting grooves for binding the binding straps; Opening a plurality of installation positioning holes on the initial model; A glue overflow groove is formed on one end surface of the initial model to obtain the first model.

3. The end plate model generation method according to claim 2, characterized in that: The width of the limiting groove is greater than the width of the binding strap, and the difference between the width of the limiting groove and the width of the binding strap is in a range of 0.5 mm to 1.5 mm; the depth of the limiting groove is equal to the thickness of the binding strap.

4. The end plate model generation method according to claim 2, characterized in that: The overflow glue groove is in a U-shape along the edge of the end surface, the depth of the overflow glue groove ranges from 1 mm to 1.5 mm, and the width of the overflow glue groove ranges from 2.5 mm to 3.5 mm.

5. The end plate model generation method according to claim 2, characterized in that: The step of performing structural enhancement processing on the first model to obtain the second model comprises: A reinforcing rib structure is formed on the first model to obtain the second model.

6. The method for generating an end plate model according to claim 5, characterized in that: The step of adding an engineering structure to the second model to obtain a third model comprises: According to the preset parameters of the automatic hoisting holes, a plurality of first hoisting holes are formed on the second model; According to the preset parameters of the manual lifting holes, a plurality of second lifting holes are formed on the second model to obtain the third model.

7. The method for generating an end plate model according to claim 6, characterized in that: The step of simulating and verifying the third model, outputting simulation results, and modifying the third model according to the simulation results to obtain the end plate model includes: Importing the design parameters of the third model into simulation software to establish a simulation model; According to the preset constraints, verify whether the simulation model meets the design requirements; If the design requirements are met, the end plate model is output; if the design requirements are not met, the data indicating that the simulation model does not meet the design requirements is output, and the simulation model is modified according to the data, and then the simulation model is re-verified whether it meets the design requirements, and this cycle is repeated until the simulation model meets the design requirements and the end plate model is output.

8. The method for generating an end plate model according to claim 7, characterized in that: The design parameters include the size and position of the limit groove, the size and position of the installation positioning hole, the size and position of the glue overflow groove, the size and position of the reinforcing rib, the size and position of the first lifting hole and the second lifting hole, the size, tensile strength, yield strength and elastic modulus of the third model.

9. The method for generating an end plate model according to claim 7, characterized in that: The step of verifying whether the simulation model meets the design requirements according to the preset constraint conditions includes: According to the design parameters of the simulation model, determining whether the design parameters meet the preset constraint conditions; If satisfied, the simulation model is calculated, and the Mises stress and maximum displacement of the simulation model are output; Based on the Mises stress and maximum displacement of the simulation model, it is verified whether the simulation model meets the design requirements.

10. The method for generating an end plate model according to claim 9, characterized in that: The preset constraint conditions include a first constraint condition, a second constraint condition and a third constraint condition; The first constraint condition is whether the preload force of the battery module installed through the installation positioning hole in the simulation model is within the range of the preset preload force; The second constraint condition is whether the design parameters of the simulation model are all within a preset design parameter range; The third constraint condition is whether the expansion force range and deformation range of the battery cell are within the force range and deformation range of the simulation model.

11. The method for generating an end plate model according to claim 1, characterized in that: Before the step of simulating and verifying the third model and outputting the simulation result, the method further includes: forming a weight-reducing structure on the third mold; The corners of the third model are rounded or chamfered.

12. An end plate model processing device, characterized in that: include: An acquisition generation module is used to acquire the size of the end plate model to be generated, and generate an initial model matching the size of the end plate model to be generated; A first model generation module, configured to perform basic structure processing on the initial model according to the end plate target function to obtain a first model; A second model generating module, used for performing structural enhancement processing on the first model to obtain a second model, wherein the structural strength of the second model is not less than a preset strength; A third model generating module, used for adding a construction structure to the second model to obtain a third model; A simulation verification module, used for performing simulation verification on the third model and outputting simulation results; A modification module is used to modify the third model according to the simulation results to obtain an end plate model.

13. A battery module end plate, characterized in that: The battery module of claim 1, wherein the first and second sides of the battery module are connected to each other via a plurality of first and second mounting holes, the first and second sides of the battery module being configured to have a plurality of first and second mounting holes, and the first and second sides of the battery module being configured to have a plurality of first and second mounting holes.

14. A battery module, characterized in that: Comprising the battery module end plate as claimed in claim 13.

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