A power battery box cover pressing test simulation method, device, equipment and medium

Abstract

The application relates to the technical field of engineering design simulation, and provides a power battery box cover pressing test simulation method, device, equipment and medium, the method comprises the following steps: acquiring frame design parameters and cover design parameters of a power battery box; generating a power battery box simulation frame according to the frame design parameters; generating a power battery box simulation cover by simulating cover stamping on a preset flat plate cover material according to the cover design parameters; assembling the power battery box simulation frame and the power battery box simulation cover to obtain a power battery box simulation model; and performing pressing simulation on the power battery box simulation model according to preset pressing parameters to obtain a pressing simulation result. The method can quickly predict whether the battery pack has a pressing rebound abnormal sound problem before the battery pack is produced and manufactured, has high analysis precision for the abnormal sound problem of the battery pack, and can reduce the abnormal sound analysis cost.

Description

Technical Field

[0001] This application relates to the field of engineering design simulation technology, specifically to a simulation method, device, equipment, and medium for testing the pressure of a power battery box cover. Background Technology

[0002] As the market share of new energy vehicles increases year by year, the performance of power batteries has become an increasingly important concern. As an integral part of the vehicle assembly, the performance of the power battery pack significantly impacts the overall vehicle performance, such as NVH (Noise, Vibration, and Harshness) performance. For example, if the power battery pack cover itself exhibits a metallic rebound noise when pressed, it can cause the vehicle, when subjected to external impacts, torsional loads, and bending loads while driving, to produce this metallic rebound sound. This sound can be transmitted through the air to the passenger compartment, affecting not only the comfort of the occupants and driver but also potentially leading to misjudgments by the driver. Furthermore, the metallic rebound caused by stress can reduce the lifespan of the power battery pack. Failure to detect this metallic rebound through unusual noises from the cover can compromise the safety of the occupants and driver.

[0003] Existing methods for testing abnormal pressing noises mostly involve detecting noises from a physical device. For example, Chinese patent CN110967175A discloses a system, method, control device, and storage medium for testing abnormal pressing noises. The system includes a base plate, a pressing device, a sound acquisition device, and a control device. The pressing device is mounted on the base plate and is used to press the terminal under test placed on the base plate. The sound acquisition device is mounted on the base plate and is used to collect sound information generated when the terminal under test is pressed by the pressing device. The control device is used to determine whether the terminal under test exhibits abnormal pressing noises based on the sound information. Chinese patent CN204160361U discloses an adjustable clamp for testing abnormal pressing noises, including an upper clamp and a lower clamp, which are hinged together. The upper clamp includes a first holding part and a first handle part, and the lower clamp includes a second holding part and a second handle part. A spring connects the first handle part and the second handle part. One end of the spring is connected to the first handle part via a first adjusting bolt, and the other end of the spring is connected to the second handle part via a second adjusting bolt. The aforementioned existing technologies all detect abnormal noises by inspecting the physical device, but do not analyze the abnormal noises in the manufacturing process of the device. In addition, because different physical devices will produce different abnormal noise phenomena due to the influence of the manufacturing process, it would be very costly to inspect each physical device.

[0004] Therefore, how to efficiently and cost-effectively detect abnormal noises from the power battery box cover is an urgent problem that needs to be solved. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this application is to provide a simulation method, device, equipment and medium for pressing test of power battery box cover, so as to solve the problem of how to detect abnormal noise of power battery box cover in a high-efficiency and low-cost manner in the prior art.

[0006] To achieve the above and other related objectives, this application provides a simulation method for pressing a power battery box cover, the method comprising:

[0007] Obtain the frame design parameters and cover design parameters of the power battery box;

[0008] Based on the framework design parameters, a power battery box simulation framework is generated;

[0009] Based on the design parameters of the cover, a simulated cover stamping process is performed on the preset flat cover material to generate a simulated cover for the power battery box.

[0010] The power battery box simulation frame and the power battery box simulation cover are assembled to obtain the power battery box simulation model.

[0011] Based on the preset pressing parameters, the pressing simulation model of the power battery box is subjected to pressing simulation to obtain pressing simulation results.

[0012] In one embodiment of this application, the power battery box simulation cover includes an upper power battery box simulation cover and a lower power battery box simulation cover. After obtaining the power battery box simulation model, the method further includes:

[0013] Obtain the local protrusions on the upper power battery box simulation cover and / or the lower power battery box simulation cover;

[0014] The local protrusion is set as the target pressing area to simulate pressing through the target pressing area.

[0015] 3. The power battery box cover pressing test simulation method according to claim 2, characterized in that, pressing simulation is performed on the power battery box simulation model according to preset pressing parameters, including:

[0016] Based on the preset pressing parameters, a simulated pressing load is generated;

[0017] The simulated pressing load is applied to the target pressing area to perform a pressing simulation.

[0018] In one embodiment of this application, after obtaining the pressing simulation result, the method further includes:

[0019] Obtain the deformation parameters of the target pressing area and the deformation parameters of the surrounding area within a preset range. The deformation parameters of the target pressing area and the deformation parameters of the surrounding area within a preset range are included in the pressing simulation results.

[0020] Based on the deformation parameters of the target pressing area and the deformation parameters of the surrounding area within the preset range, a curve is plotted between the pressing load and the abnormal noise displacement of the box cover.

[0021] If there is a plateau region in the curve between the pressing load and the abnormal noise displacement of the cover, then it is determined that the simulated cover of the power battery box will emit abnormal noise.

[0022] In one embodiment of this application, the step of performing simulated box cover stamping on a preset flat box cover material according to the box cover design parameters includes:

[0023] Based on the design parameters of the battery box cover, a simulation mold of the power battery box cover is generated;

[0024] The flat box cover material is matched and brought into contact with the power battery box cover simulation mold to obtain the simulated joint component to be stamped;

[0025] According to the preset stamping simulation step size, a stamping simulation load is applied to the stamping simulation combined component to simulate the stamping of the box cover.

[0026] In one embodiment of this application, after generating the simulated power battery box cover, the method further includes:

[0027] According to the preset first pressure holding simulation step, a pressure holding simulation load is continuously applied to the power battery box simulation box cover in the power battery box simulation box cover mold to reduce the dynamic oscillation of the stamping.

[0028] In one embodiment of this application, after generating the simulated power battery box cover, the method further includes:

[0029] According to the preset springback simulation step length, the punch mold that applies the pressure holding simulation load is separated from the power battery box simulation cover to achieve surface springback of the power battery box simulation cover.

[0030] In one embodiment of this application, after obtaining the power battery box simulation model, the method further includes:

[0031] Based on the preset second pressure-holding simulation step size and damping coefficient, a pressure-holding simulation load is applied to the power battery box simulation model to reduce the vibration of the power battery box simulation model.

[0032] In one embodiment of this application, assembling the power battery box simulation frame and the power battery box simulation cover includes:

[0033] Based on the frame design parameters and the box cover design parameters, a rigid installation simulation shim is generated, which matches the box cover mounting holes.

[0034] The battery box simulation cover is placed between the rigid mounting simulation pad and the preset rigid mounting simulation surface, and the battery box simulation cover is installed on the battery box simulation frame by a preset friction coefficient.

[0035] In one embodiment of this application, a power battery box cover pressing test simulation device is also provided, the device comprising:

[0036] The parameter acquisition module is used to acquire the frame design parameters and cover design parameters of the power battery box.

[0037] The framework generation module is used to generate a power battery box simulation framework based on the framework design parameters.

[0038] The stamping module is used to perform simulated box cover stamping on the preset flat box cover material according to the box cover design parameters to generate a simulated box cover for the power battery box.

[0039] An assembly module is used to assemble the power battery box simulation frame and the power battery box simulation cover to obtain a power battery box simulation model.

[0040] The pressing simulation module is used to perform pressing simulation on the power battery box simulation model according to preset pressing parameters, and obtain pressing simulation results.

[0041] In one embodiment of this application, an electronic device is also provided, the electronic device comprising:

[0042] One or more processors;

[0043] A storage device for storing one or more programs, which, when executed by one or more processors, cause the electronic device to implement the power battery box cover press test simulation method as described above.

[0044] In one embodiment of this application, a computer-readable storage medium is also provided, on which a computer program is stored. When the computer program is executed by the processor of a computer, the computer performs the power battery box cover pressing test simulation method as described above.

[0045] The beneficial effects of this invention are:

[0046] First, the frame design parameters and cover design parameters of the power battery box are obtained. Then, based on the frame design parameters, a power battery box simulation frame is generated. Next, based on the cover design parameters, a simulated cover stamping process is performed on a preset flat cover material to generate a simulated power battery box cover. Then, the power battery box simulation frame and the simulated power battery box cover are assembled to obtain a power battery box simulation model. Finally, based on preset pressing parameters, a pressing simulation is performed on the power battery box simulation model to obtain the pressing simulation results. In this invention, dynamic display dynamic simulation can be used to simulate the stamping process of the power battery box cover, and the power battery box cover is assembled based on the results of the stamping process simulation. Finally, a pressing simulation is performed in the assembled state, and the pressing simulation results are used to determine whether the power battery box cover will emit abnormal noise. The method described in this invention simulates the stamping process of thin metal sheets on a stamping die, and simulates the springback deformation of the power battery box cover after stamping. This includes the residual deformation from the springback of the power battery box cover in the simulation results. Based on these simulation results, the power battery box is installed, taking into account the overall load-bearing effect of the deformation at each mounting point of the power battery box cover after springback during installation. Then, a pressing simulation is performed on the assembled power battery box simulation model. This allows for efficient and rapid prediction of whether the power battery box will have pressing and springback noise issues before manufacturing. Furthermore, the noise analysis results can provide optimization solutions to avoid these noise problems. In addition, the noise simulation analysis method in this invention has high analytical accuracy for power battery box noise issues and can reduce the cost of noise analysis.

[0047] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0048] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0049] Figure 1 This is a schematic diagram illustrating the implementation environment of a power battery box cover pressing test simulation method, as shown in an exemplary embodiment of this application.

[0050] Figure 2 This is a schematic flowchart illustrating a power battery box cover press test simulation method according to an exemplary embodiment of this application;

[0051] Figure 3This is a schematic diagram illustrating the relationship between pressing load and abnormal noise displacement of the box cover, as shown in an exemplary embodiment of this application.

[0052] Figure 4 This is a schematic diagram of the assembly of the power battery box cover, illustrating an exemplary embodiment of this application;

[0053] Figure 5 This is a flowchart illustrating a simulation method for pressing a power battery box cover, as shown in another exemplary embodiment of this application.

[0054] Figure 6 This is a block diagram illustrating a power battery box cover press test simulation device, as shown in an exemplary embodiment of this application.

[0055] Figure 7 A schematic diagram of the structure of a computer system suitable for an electronic device according to an embodiment of this application is shown. Detailed Implementation

[0056] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0057] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0058] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the invention.

[0059] First, it's important to note that the structure of a power battery pack mainly includes the power cells, the battery pack frame, the cooling system, the battery pack cover, and the control system. The upper and lower covers of the power battery pack are mostly stamped from thin metal sheets and then fastened to the battery pack frame with screws. Because the stamping process itself involves significant springback deformation, the absolute flatness of the stamped upper and lower covers cannot be guaranteed. When the upper and lower covers are installed onto the battery pack frame, some localized bulges will appear on the battery pack covers. These bulges will produce a metallic rebound sound under a pressing load of up to 300N. Consequently, the entire vehicle will exhibit this metallic rebound noise while driving on the road.

[0060] If the battery box cover in its design state is directly used for pressing simulation, the pressing noise problem cannot be simulated because there are no local bulges and no residual energy storage from the stamping process in the design state. Therefore, the manufacturing process needs to be considered as a prerequisite for pressing simulation. This application addresses the above problem by performing stamping simulation on the upper and lower battery box covers, and then assembling the entire battery box covers based on the results of the stamping simulation. Finally, pressing simulation is performed in the assembled state, and the presence of pressing metal rebound noise in the upper and lower battery box covers is evaluated through local pressing load-displacement curves. The pressing test simulation method for the battery box cover in this application performs a full-process chain pressing simulation analysis of the battery box manufacturing process, fully considering the actual installation state of the upper and lower battery box covers.

[0061] The following explains the technical terms used in this application:

[0062] Stamping: Stamping is a metal processing method that is based on the plastic deformation of metal. It uses dies and stamping equipment to apply loads to sheet metal, causing the sheet metal to undergo plastic deformation or separation, thereby obtaining parts (stamped parts) with certain shapes, dimensions and properties.

[0063] Pressure holding: Controlling the pressure holding load is crucial for reducing flash and preventing mechanical damage. Effective pressure holding load control helps reduce product shrinkage and improves the product's appearance quality.

[0064] Springback: Metal materials always undergo elastic deformation during plastic bending. Therefore, after the bending moment is removed, the bending radius of the bent part becomes inconsistent with the mold size. This phenomenon is called springback.

[0065] Figure 1 This is a schematic diagram illustrating the implementation environment of a power battery box cover pressing test simulation method, as shown in an exemplary embodiment of this application.

[0066] Reference Figure 1As shown, the implementation environment may include a power battery box cover pressing test simulation terminal 101, an interactive terminal 102, and a server 103. The technical solution provided in this application embodiment can be applied to the power battery box cover pressing test simulation terminal 101. The power battery box cover pressing test simulation terminal 101 is used to obtain the frame design parameters and cover design parameters of the power battery box output by the interactive terminal 102, so as to realize the power battery box cover pressing test simulation method in this invention. After obtaining the simulation analysis results, the simulation analysis results are transmitted to the server 103 for storage or further abnormal noise optimization analysis.

[0067] In one embodiment of this application, the power battery box cover pressing test simulation terminal 101 acquires the frame design parameters and cover design parameters of the power battery box; generates a power battery box simulation frame according to the frame design parameters; performs simulated cover stamping on a preset flat cover material according to the cover design parameters to generate a power battery box simulation cover; assembles the power battery box simulation frame and the power battery box simulation cover to obtain a power battery box simulation model; and performs pressing simulation on the power battery box simulation model according to preset pressing parameters to obtain pressing simulation results. In this embodiment, dynamic display dynamic simulation can be used to simulate the stamping and forming of the power battery box cover, and assemble the power battery box cover based on the results of the stamping and forming simulation. Finally, pressing simulation is performed in the assembled state, and the pressing simulation results are used to determine whether the power battery box cover will make abnormal noises. The method described in this invention simulates the stamping process of thin metal sheets on a stamping die, and simulates the springback deformation of the power battery box cover after stamping. This includes the residual deformation from the springback of the power battery box cover in the simulation results. Based on these simulation results, the power battery box is installed, taking into account the overall load-bearing effect of the deformation at each mounting point of the power battery box cover after springback during installation. Then, a pressing simulation is performed on the assembled power battery box simulation model. This allows for efficient and rapid prediction of whether the power battery box will have pressing and springback noise issues before manufacturing. Furthermore, the noise analysis results can provide optimization solutions to avoid these noise problems. In addition, the noise simulation analysis method in this invention has high analytical accuracy for power battery box noise issues and can reduce the cost of noise analysis.

[0068] The above section introduced the exemplary implementation environment of the technical solution of this application. Next, we will continue to introduce the simulation method for pressing the power battery box cover of this application.

[0069] To address the problem of how to efficiently and cost-effectively detect abnormal noises from power battery box covers in existing technologies, embodiments of this application propose a power battery box cover pressing test simulation method, a power battery box cover pressing test simulation device, an electronic device, a computer-readable storage medium, and a computer program product. These embodiments will be described in detail below.

[0070] Please see Figure 2 , Figure 2 This is a schematic flowchart illustrating a simulation method for pressing a power battery box cover, as shown in an exemplary embodiment of this application. This method can be applied to... Figure 1 The implementation environment is shown. It should be understood that this method can also be applied to other exemplary implementation environments and specifically executed by devices in other implementation environments. This embodiment does not limit the implementation environment to which the method is applicable.

[0071] like Figure 2 As shown, in an exemplary embodiment, the power battery box cover pressing test simulation method includes at least steps S210 to S250, which are described in detail below:

[0072] In step S210, the frame design parameters and cover design parameters of the power battery box are obtained.

[0073] For example, the user presses the power battery box frame design parameters and box cover design parameters into the power battery box cover press test simulation terminal 101 via the interactive terminal 102, and then performs a press simulation through the dynamic display dynamic simulation environment in the power battery box cover press test simulation terminal 101.

[0074] In step S220, a simulation framework for the power battery box is generated based on the framework design parameters.

[0075] In step S230, according to the design parameters of the cover, the preset flat cover material is used to perform simulated cover stamping to generate a simulated cover for the power battery box.

[0076] In step S240, the power battery box simulation frame and the power battery box simulation cover are assembled to obtain the power battery box simulation model.

[0077] In step S250, the power battery box simulation model is subjected to a pressing simulation based on preset pressing parameters to obtain the pressing simulation results.

[0078] For example, the simulation results include the deformation parameters of the local protrusion and its surrounding area. The simulation results can generate a load-displacement relationship curve, and then the relationship curve can be used to determine whether the box cover makes abnormal noise.

[0079] As can be seen from the above steps S210 to S250, the solution proposed in this embodiment can use dynamic display dynamic simulation to simulate the stamping and forming of the power battery box cover, and assemble the power battery box cover based on the results of the stamping and forming simulation. Finally, in the assembled state, a pressing simulation is performed, and the power battery box cover is judged to make any abnormal noise based on the pressing simulation results. The method described in this invention simulates the stamping process of thin metal sheets on a stamping die, and simulates the springback deformation of the power battery box cover after stamping. This includes the residual deformation from the springback of the power battery box cover in the simulation results. Based on these simulation results, the power battery box is installed, taking into account the overall load-bearing effect of the deformation at each mounting point of the power battery box cover after springback during installation. Then, a pressing simulation is performed on the assembled power battery box simulation model. This allows for efficient and rapid prediction of whether the power battery box will have pressing and springback noise issues before manufacturing. Furthermore, the noise analysis results can provide optimization solutions to avoid these noise problems. In addition, the noise simulation analysis method in this invention has high analytical accuracy for power battery box noise issues and can reduce the cost of noise analysis.

[0080] In one embodiment of this application, the power battery box simulation cover includes an upper power battery box simulation cover and a lower power battery box simulation cover. After obtaining the power battery box simulation model, the method further includes:

[0081] Obtain the local protrusions on the upper power battery box simulation cover and / or the lower power battery box simulation cover;

[0082] The local protrusion is set as the target pressing area to simulate pressing through the target pressing area.

[0083] For example, since the abnormal noise when pressing the upper and lower covers of the power battery box usually occurs at localized protrusions, these protrusions are not the intended protrusions, but rather localized protrusions that appear after the stamping and springback process and installation onto the power battery box frame. Therefore, this invention simulates the stamping process of thin metal sheets on a stamping die and simulates the springback deformation of the power battery box cover after stamping. In this way, the residual deformation of the power battery box cover after stamping and springback is included in the simulation results. The power battery box is then installed based on the stamping and springback results, taking into account the overall load during the installation process caused by the deformation of each mounting point of the power battery box cover after stamping and springback.

[0084] In one embodiment of this application, a pressing simulation is performed on the power battery box simulation model according to preset pressing parameters, including:

[0085] Based on the preset pressing parameters, a simulated pressing load is generated;

[0086] The simulated pressing load is applied to the target pressing area to perform a pressing simulation.

[0087] For example, a 300N load simulation was performed on a localized protrusion on the battery pack cover caused by stamping and installation. The results of the pressing load and displacement were read and plotted as a load-displacement curve. If the curve has a plateau region with respect to the load, meaning the load increases very little but the displacement increases to a certain extent, it is considered that there is a localized instability and rebound phenomenon in that area. This phenomenon will lead to abnormal rebound noise from the pressing load on the battery pack cover in the future, and consequently, to abnormal metallic rebound noise when the new energy vehicle is driven on impact, torsion, or curved roads.

[0088] In one embodiment of this application, after obtaining the pressing simulation results, the method further includes:

[0089] Obtain the deformation parameters of the target pressing area and the deformation parameters of the surrounding area within a preset range. The deformation parameters of the target pressing area and the deformation parameters of the surrounding area within a preset range are included in the pressing simulation results.

[0090] Based on the deformation parameters of the target pressing area and the deformation parameters of the surrounding area within the preset range, a curve is plotted between the pressing load and the abnormal noise displacement of the box cover.

[0091] If there is a plateau region in the curve between the pressing load and the abnormal noise displacement of the cover, then it is determined that the simulated cover of the power battery box will emit abnormal noise.

[0092] For example, see Figure 3 , Figure 3 This is a schematic diagram illustrating the relationship between pressing load and abnormal noise displacement of the box cover, as shown in an exemplary embodiment of this application. Based on the simulation of pressing load on the local protruding part, the pressing load and the deformation results around the pressing are read to draw the relationship curve between pressing load (i.e., force) and displacement. If there is a plateau region in the pressing load and displacement curve, it proves that there is a local instability in that region, which will produce abnormal noise due to metal instability and rebound.

[0093] In one embodiment of this application, according to the lid design parameters, a simulated lid stamping process is performed on a preset flat lid material, including:

[0094] Based on the design parameters of the battery box cover, a simulation mold of the power battery box cover is generated;

[0095] The flat box cover material is matched and brought into contact with the power battery box cover simulation mold to obtain the simulated joint component to be stamped;

[0096] According to the preset stamping simulation step size, a stamping simulation load is applied to the stamping simulation combined component to simulate the stamping of the box cover.

[0097] For example, dynamic display dynamics simulation is used to simulate the process of stamping the power battery box cover from flat steel into the designed shape, establish the contact relationship between the stamping die and the stamped power battery box cover, and the stamping simulation step size is 0.1s.

[0098] In one embodiment of this application, after generating the simulated power battery box cover, the method further includes:

[0099] According to the preset first pressure holding simulation step, a pressure holding simulation load is continuously applied to the power battery box simulation box cover in the power battery box simulation box cover mold to reduce the dynamic oscillation of the stamping.

[0100] For example, after applying a stamping simulation load to the stamping simulation combined component, the first holding simulation step of the applied holding simulation load is maintained to ensure that the contact load is established smoothly and to minimize the dynamic oscillations of the stamping process.

[0101] In one embodiment of this application, after generating the simulated power battery box cover, the method further includes:

[0102] According to the preset springback simulation step length, the punch mold that applies the pressure holding simulation load is separated from the power battery box simulation cover to achieve surface springback of the power battery box simulation cover.

[0103] For example, springback simulation involves retracting the punch from the die and allowing the battery box cover to rest freely on the die. The simulation step is 0.1 seconds. The springback process is achieved through the retraction of the punch and the failure of contact between the punch and the battery box cover. Because the results of the springback simulation include residual deformation from the stamping process, the shape of the battery box cover in this state will differ significantly from the designed shape. The main differences are the overall deformation of the battery box cover edge and the local bulges in the battery box cover.

[0104] In one embodiment of this application, after obtaining the power battery box simulation model, the method further includes:

[0105] Based on the preset second pressure-holding simulation step size and damping coefficient, a pressure-holding simulation load is applied to the power battery box simulation model to reduce the vibration of the power battery box simulation model.

[0106] For example, the main function of the installation pressure holding simulation process is to stabilize the vibration during the installation of the power battery box cover. Since the entire power battery box cover pressing test simulation uses dynamic simulation, applying dynamic simulation analysis to the static installation process will generate additional kinetic energy. In order to reduce the self-vibration of the power battery box cover after installation, this installation pressure holding process is set, and a damping coefficient is set to allow the power battery box cover to quickly and smoothly stabilize. The simulation step size of the installation pressure holding process is 0.1s.

[0107] In one embodiment of this application, assembling the power battery box simulation frame and the power battery box simulation cover includes:

[0108] Based on the frame design parameters and the box cover design parameters, a rigid installation simulation shim is generated, which matches the box cover mounting holes.

[0109] The battery box simulation cover is placed between the rigid mounting simulation pad and the preset rigid mounting simulation surface, and the battery box simulation cover is installed on the battery box simulation frame by a preset friction coefficient.

[0110] Exemplary, exemplary, see Figure 4 , Figure 4 This is a schematic diagram illustrating the assembly of a power battery box cover, as shown in an exemplary embodiment of this application. Installation simulation describes the process of installing the power battery box cover onto the power battery box frame. To realize this process in a virtual simulation, some approximations are required. For example... Figure 4 As shown, a rigid mounting simulation shim and a rigid mounting simulation surface are established. The rigid mounting simulation shim needs to be established based on the actual mounting hole position of the power battery box cover plate, and is located 1mm below the upper surface of the stamping die. The mounting surface of the power battery box cover plate needs to consider the overall springback deformation to ensure that the mounting surface of the power battery box cover plate can exceed the stamping deformation power battery box mounting surface by 1mm. During the simulation process, the power battery box cover plate will be moved to the rigid mounting simulation surface, and the mounting hole will be positioned and installed by setting a friction coefficient of 0.5. The simulation step size of the installation process is 0.1s.

[0111] In one embodiment of this application, see Figure 5 , Figure 5This is a flowchart illustrating a simulation method for a power battery box cover pressing test, as shown in another exemplary embodiment of this application. The simulation of the power battery box cover pressing test requires six processes: stamping, holding pressure, springback, installation, holding pressure again, and pressing. These six processes are performed according to the actual manufacturing process sequence; that is, the simulation proceeds from stamping to installation to pressing, with each process using a time step of 0.1 seconds. The simulation of abnormal noise from the entire power battery box metal cover across the entire manufacturing chain is ultimately evaluated using the load and displacement curves of the pressing test. If the curve shows a significant plateau region related to the load, it indicates that the power battery box cover has an abnormal noise problem. This invention provides a high-precision, low-cost simulation analysis method for power battery box cover abnormal noise problems, encompassing the entire manufacturing process, solving the problems that cannot be avoided by design and cannot be evaluated by manufacturing process alone.

[0112] See Figure 6 , Figure 6 This is a block diagram illustrating a power battery box cover pressure test simulation device according to an exemplary embodiment of this application. The device can be applied to... Figure 1 The implementation environment shown is not limited to this embodiment. This device can also be applied to other exemplary implementation environments and specifically configured in other devices. This embodiment does not limit the implementation environment to which the device is applicable.

[0113] like Figure 6 As shown, the exemplary power battery box cover press test simulation device includes:

[0114] The parameter acquisition module 601 is used to acquire the frame design parameters and cover design parameters of the power battery box;

[0115] The frame generation module 602 is used to generate a power battery box simulation frame according to the frame design parameters.

[0116] The stamping module 603 is used to perform simulated box cover stamping on the preset flat box cover material according to the box cover design parameters to generate a simulated box cover for the power battery box.

[0117] Assembly module 604 is used to assemble the power battery box simulation frame and the power battery box simulation cover to obtain a power battery box simulation model.

[0118] The pressing simulation module 605 is used to perform pressing simulation on the power battery box simulation model according to preset pressing parameters, and obtain pressing simulation results.

[0119] In this exemplary power battery box cover pressing test simulation device, dynamic display dynamic simulation can be used to simulate the stamping and forming of the power battery box cover, and the power battery box cover can be assembled based on the results of the stamping and forming simulation. Finally, pressing simulation is performed in the assembled state, and the power battery box cover will make abnormal noise based on the pressing simulation results. The method described in this invention simulates the stamping process of thin metal sheets on a stamping die, and simulates the springback deformation of the power battery box cover after stamping. This includes the residual deformation from the springback of the power battery box cover in the simulation results. Based on these simulation results, the power battery box is installed, taking into account the overall load-bearing effect of the deformation at each mounting point of the power battery box cover after springback during installation. Then, a pressing simulation is performed on the assembled power battery box simulation model. This allows for efficient and rapid prediction of whether the power battery box will have pressing and springback noise issues before manufacturing. Furthermore, the noise analysis results can provide optimization solutions to avoid these noise problems. In addition, the noise simulation analysis method in this invention has high analytical accuracy for power battery box noise issues and can reduce the cost of noise analysis.

[0120] It should be noted that the power battery box cover pressing test simulation device provided in the above embodiments and the power battery box cover pressing test simulation method provided in the above embodiments belong to the same concept. The specific operation methods of each module and unit have been described in detail in the method embodiments, and will not be repeated here. In practical applications, the power battery box cover pressing test simulation device provided in the above embodiments can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. This is not a limitation here.

[0121] Embodiments of this application also provide an electronic device, including: one or more processors; and a storage device for storing one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the power battery box cover pressing test simulation method provided in the above embodiments.

[0122] Figure 7 A schematic diagram of a computer system suitable for an electronic device according to an embodiment of this application is shown. It should be noted that... Figure 7 The computer system 700 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0123] like Figure 7As shown, the computer system 700 includes a Central Processing Unit (CPU) 701, which can perform various appropriate actions and processes based on programs stored in Read-Only Memory (ROM) 702 or programs loaded from Storage Unit 708 into Random Access Memory (RAM) 703, such as performing the methods described in the above embodiments. The RAM 703 also stores various programs and data required for system operation. The CPU 701, ROM 702, and RAM 703 are interconnected via a bus 704. An Input / Output (I / O) interface 705 is also connected to the bus 704.

[0124] The following components are connected to the I / O interface 705: an input section 706 including a keyboard, mouse, etc.; an output section 707 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 708 including a hard disk, etc.; and a communication section 709 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 709 performs communication processing via a network such as the Internet. A drive 710 is also connected to the I / O interface 705 as needed. A removable medium 711, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on the drive 710 as needed so that computer programs read from it can be installed into the storage section 708 as needed.

[0125] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program including a computer program for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 709, and / or installed from removable medium 711. When the computer program is executed by central processing unit (CPU) 701, it performs various functions defined in the system of this application.

[0126] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying a computer-readable computer program. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0127] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0128] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0129] Another aspect of this application provides a computer-readable storage medium storing a computer program thereon, which, when executed by a computer's processor, causes the computer to perform the power battery box cover pressing test simulation method as described above. This computer-readable storage medium may be included in the electronic device described in the above embodiments, or it may exist independently and not assembled into the electronic device.

[0130] Another aspect of this application provides a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the power battery box cover pressing test simulation method provided in the various embodiments above.

[0131] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A simulation method for pressing test of a power battery box cover, characterized in that, The method includes: Obtain the frame design parameters and cover design parameters of the power battery box; Based on the framework design parameters, a power battery box simulation framework is generated; According to the design parameters of the cover, a simulated cover stamping process is performed on a preset flat cover material to generate a simulated cover for the power battery box. This process includes: generating a simulated mold for the power battery box cover according to the design parameters; matching and contacting the flat cover material with the simulated mold to obtain a simulated component to be stamped; and applying a simulated stamping load to the simulated component according to a preset stamping simulation step size to simulate cover stamping. The power battery box simulation frame and the power battery box simulation cover are assembled to obtain the power battery box simulation model. Based on the preset pressing parameters, the pressing simulation model of the power battery box is subjected to pressing simulation to obtain pressing simulation results.

2. The simulation method for pressing the power battery box cover according to claim 1, characterized in that, The power battery box simulation cover includes an upper power battery box simulation cover and a lower power battery box simulation cover. After obtaining the power battery box simulation model, it also includes: Obtain the local protrusions on the upper power battery box simulation cover and / or the lower power battery box simulation cover; The local protrusion is set as the target pressing area to simulate pressing through the target pressing area.

3. The simulation method for pressing the power battery box cover according to claim 2, characterized in that, Based on preset pressing parameters, a pressing simulation is performed on the power battery box simulation model, including: Based on the preset pressing parameters, a simulated pressing load is generated; The simulated pressing load is applied to the target pressing area to perform a pressing simulation.

4. The simulation method for pressing the power battery box cover according to claim 2, characterized in that, After obtaining the pressure simulation results, the following is also included: Obtain the deformation parameters of the target pressing area and the deformation parameters of the surrounding area within a preset range. The deformation parameters of the target pressing area and the deformation parameters of the surrounding area within a preset range are included in the pressing simulation results. Based on the deformation parameters of the target pressing area and the deformation parameters of the surrounding area within the preset range, a curve is plotted between the pressing load and the abnormal noise displacement of the box cover. If there is a plateau region in the curve between the pressing load and the abnormal noise displacement of the cover, then it is determined that the simulated cover of the power battery box will emit abnormal noise.

5. The simulation method for pressing the power battery box cover according to claim 4, characterized in that, After generating the simulated cover for the power battery box, the following is also included: According to the preset first pressure holding simulation step, a pressure holding simulation load is continuously applied to the power battery box simulation box cover in the power battery box simulation box cover mold to reduce the dynamic oscillation of the stamping.

6. The simulation method for pressing the power battery box cover according to claim 5, characterized in that, After generating the simulated cover for the power battery box, the process also includes: According to the preset springback simulation step length, the punch mold that applies the pressure holding simulation load is separated from the power battery box simulation cover to achieve surface springback of the power battery box simulation cover.

7. The simulation method for pressing the power battery box cover according to claim 1, characterized in that, After obtaining the simulation model of the power battery box, the following is also included: Based on the preset second pressure-holding simulation step size and damping coefficient, a pressure-holding simulation load is applied to the power battery box simulation model to reduce the vibration of the power battery box simulation model.

8. The simulation method for pressing the power battery box cover according to claim 1, characterized in that, The assembly of the power battery box simulation frame and the power battery box simulation cover includes: Based on the frame design parameters and the box cover design parameters, a rigid installation simulation shim is generated, which matches the box cover mounting holes. The battery box simulation cover is placed between the rigid mounting simulation pad and the preset rigid mounting simulation surface, and the battery box simulation cover is installed on the battery box simulation frame by a preset friction coefficient.

9. A simulation device for testing the pressing of a power battery box cover, characterized in that, The device includes: The parameter acquisition module is used to acquire the frame design parameters and cover design parameters of the power battery box. The framework generation module is used to generate a power battery box simulation framework based on the framework design parameters. The stamping module is used to perform simulated box cover stamping on a preset flat box cover material according to the box cover design parameters to generate a simulated box cover for a power battery box. The module includes: generating a simulated mold for the power battery box cover according to the box cover design parameters; matching and contacting the flat box cover material with the simulated mold to obtain a simulated component to be stamped; and applying a simulated stamping load to the simulated component according to a preset stamping simulation step size to simulate box cover stamping. An assembly module is used to assemble the power battery box simulation frame and the power battery box simulation cover to obtain a power battery box simulation model. The pressing simulation module is used to perform pressing simulation on the power battery box simulation model according to preset pressing parameters, and obtain pressing simulation results.

10. An electronic device, characterized in that, The electronic device includes: One or more processors; A storage device for storing one or more programs, which, when executed by one or more processors, cause the electronic device to implement the power battery box cover press test simulation method as described in any one of claims 1 to 8.

11. A computer-readable storage medium, characterized in that, It stores a computer program, which, when executed by the computer's processor, causes the computer to perform the power battery box cover pressing test simulation method as described in any one of claims 1 to 8.

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