Abnormal sound suppression method, device and equipment during deformation of battery pack box cover and medium

Abstract

The invention relates to the technical field of batteries, in particular to an abnormal sound suppression method and device during deformation of a battery pack box cover, equipment and a medium, and the method comprises the following steps: acquiring the current pressure of a battery pack; inputting the current pressure into a pressure-deformation prediction model to obtain a deformation prediction quantity of the battery pack box cover; and when the deformation prediction amount of the battery pack is greater than or equal to a preset threshold value, abnormal sound generated by deformation of the battery pack box cover is inhibited based on a preset elastic piece adding strategy. Therefore, the problems that in the prior art, a scheme for restraining abnormal sound generated by abnormal deformation of the box cover is high in cost and heavy in weight, and the abnormal sound cannot be effectively restrained when the deformation amount of the box cover is different are solved, the requirement for buffering materials is reduced, the rigidity and durability of the overall structure are improved, the requirements of various application scenes are met, the cost is low, and the practicability is high. Abnormal deformation of the box cover is effectively restrained, and abnormal sound and mechanical damage caused by collision with a vehicle bottom plate are avoided.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a method, device, equipment and medium for suppressing abnormal noise when a battery pack cover is deformed. Background Art

[0002] When the power battery is fast-charged at low temperatures, the thermal management system begins to heat up, and the battery also generates heat, causing the gas inside the battery compartment to expand, resulting in increased pressure (typically 0.2-1.5kPa). The battery compartment lid can deform outward by up to 10-30mm (the battery compartment lid is typically made of steel with a thickness of 0.7mm-1.0mm). The clearance between the vehicle floor and the battery pack is typically designed to be 6-10mm. This deformation of the battery compartment lid can exceed the clearance between the vehicle floor and the battery pack, resulting in momentary contact between the lid and the vehicle floor, causing NVH noise (sound pressure level up to 50-60dB).

[0003] Existing solutions use integral reinforcement ribs or thickened tank cover designs, which results in a 10%-15% increase in weight, which conflicts with the lightweight demand. At the same time, the cost of each piece will also increase, and it cannot adapt to different working conditions. In addition, simply increasing the stiffness of the tank cover cannot completely solve the abnormal noise problem during low-pressure charging.

[0004] Therefore, the existing solutions lack multi-physics field coupling analysis of gas production-pressure change-structural deformation of the battery pack system. The static structural design cannot match the pressure changes in the battery system box under various working conditions, which require the box cover to produce different deformation amounts. The existing filling materials (such as ordinary EVA and EPDM foam) have insufficient rebound rate (<50%) and poor material adaptability. It is difficult for existing filling materials to balance the requirements of rebound resilience, aging resistance and lightweight. Summary of the Invention

[0005] The present application provides a method, device, equipment and medium for suppressing abnormal noise caused by deformation of a battery pack cover, so as to solve the problems in the prior art of suppressing abnormal noise caused by abnormal deformation of the cover, such as high cost and heavy weight, and inability to effectively suppress abnormal noise when the deformation amount of the cover is different.

[0006] The first aspect of the present application provides a method for suppressing abnormal noise when a battery pack cover is deformed, comprising the following steps: obtaining the current pressure of the battery pack; inputting the current pressure into a pressure-deformation prediction model to obtain a predicted deformation of the battery pack cover; and when the predicted deformation of the battery pack is greater than or equal to a preset threshold, suppressing the abnormal noise generated by the deformation of the battery pack cover based on a preset strategy of adding elastic parts.

[0007] Optionally, the preset strategy of adding elastic parts to suppress the deformation of the battery pack cover and the generation of abnormal noise includes: using preset finite element software to simulate the deformation cloud map of different areas of the battery pack cover; determining the deformation amount of different areas based on the deformation cloud map, and locating the support point position of the elastic part in the battery pack cover according to the deformation amount of different areas and the preset threshold, and pasting the elastic part according to the support point position.

[0008] Optionally, the pressure-deformation prediction model is:

[0009]

[0010] Among them, δ max is the maximum deformation, α is the plate coefficient, P int is the internal pressure of the battery pack, P ext is the ambient atmospheric pressure, L is the length of the short side of the box cover, E is the elastic modulus of the box cover material, and t is the thickness of the box cover.

[0011] Optionally, after suppressing the deformation of the battery pack cover and generating abnormal noise based on a preset strategy of adding elastic parts, it includes: monitoring the compression of the elastic parts; and triggering an early warning signal when the compression of the elastic parts is greater than a preset threshold.

[0012] Optionally, the preset threshold is a gap value between the battery pack cover and the vehicle body floor.

[0013] Optionally, the thickness of the elastic member is determined by the deformation of the supporting point of the elastic member in the battery pack cover.

[0014] The second aspect of the present application provides a device for suppressing abnormal noise when a battery pack cover is deformed, including: an acquisition module for acquiring the current pressure of the battery pack; a prediction module for inputting the current pressure into a pressure-deformation prediction model to obtain a predicted deformation of the battery pack cover; and a control module for suppressing abnormal noise caused by deformation of the battery pack cover based on a preset strategy of adding elastic parts when the predicted deformation of the battery pack is greater than or equal to a preset threshold.

[0015] Optionally, the control module is also used to: use preset finite element software to simulate the deformation cloud map of different areas of the battery pack box cover; determine the deformation amount of different areas based on the deformation cloud map, and locate the support point position of the elastic part in the battery pack box cover according to the deformation amount of different areas and the preset threshold value, so as to paste the elastic part according to the support point position.

[0016] Optionally, the pressure-deformation prediction model is:

[0017]

[0018] Among them, δmax is the maximum deformation, α is the plate coefficient, P int is the internal pressure of the battery pack, P ext is the ambient atmospheric pressure, L is the length of the short side of the box cover, E is the elastic modulus of the box cover material, and t is the thickness of the box cover.

[0019] Optionally, after suppressing the deformation of the battery pack cover and generating abnormal noise based on a preset strategy of adding elastic parts, the control module is further used to: monitor the compression of the elastic part; and trigger an early warning signal when the compression of the elastic part is greater than a preset threshold.

[0020] Optionally, the preset threshold is a gap value between the battery pack cover and the vehicle body floor.

[0021] Optionally, the thickness of the elastic member is determined by the deformation of the supporting point of the elastic member in the battery pack cover.

[0022] A third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to implement the method for suppressing abnormal noise when the battery pack cover is deformed as described in the above embodiment.

[0023] The fourth embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the method for suppressing abnormal noise when the battery pack cover is deformed as described in the above embodiment.

[0024] In the above-described embodiment, the current pressure of the battery pack is obtained; the current pressure is input into a pressure-deformation prediction model to obtain a predicted deformation of the battery pack cover; and when the predicted deformation of the battery pack is greater than or equal to a preset threshold, the deformation of the battery pack cover and the resulting abnormal noise are suppressed based on a preset strategy of adding elastic members. This solves the problem that conventional solutions for suppressing abnormal deformation of the cover and the resulting abnormal noise are high in cost and weight, and cannot effectively suppress abnormal noise when the cover deformation varies. This solution reduces the need for cushioning materials, improves the rigidity and durability of the overall structure, and adapts to the needs of various application scenarios. It is low in cost and effectively suppresses abnormal deformation of the cover, preventing abnormal noise and mechanical damage caused by collision with the vehicle floor.

[0025] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0027] Figure 1 This is a flow chart of a method for suppressing abnormal noise when a battery pack cover is deformed according to an embodiment of the present application;

[0028] Figure 2 is a schematic diagram of a curve showing changes in temperature and pressure inside a battery pack according to one embodiment of the present application;

[0029] Figure 3 This is a schematic structural diagram of a battery pack and a vehicle body floor according to one embodiment of the present application;

[0030] Figure 4 This is a schematic diagram of a deformation cloud diagram of a box cover according to one embodiment of the present application;

[0031] Figure 5 This is a schematic diagram of support point positions according to one embodiment of the present application;

[0032] Figure 6 This is a flow chart of a method for suppressing abnormal noise when a battery pack cover is deformed according to one embodiment of the present application;

[0033] Figure 7 This is an example diagram of a device for suppressing abnormal noise when a battery pack cover is deformed according to an embodiment of the present application;

[0034] Figure 8 Schematic diagram of the structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0035] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0036] The following describes, with reference to the accompanying drawings, a method, device, apparatus, and medium for suppressing abnormal noise caused by deformation of a battery pack cover according to embodiments of the present application. To address the issues mentioned in the background art above regarding the high cost and weight of conventional solutions for suppressing abnormal noise caused by abnormal cover deformation, and their inability to effectively suppress the noise when the cover deformation varies, the present application provides a method for suppressing abnormal noise caused by deformation of a battery pack cover. In this method, the current pressure of the battery pack is obtained; the current pressure is input into a pressure-deformation prediction model to obtain a predicted deformation of the battery pack cover; and when the predicted deformation of the battery pack is greater than or equal to a preset threshold, the abnormal noise caused by deformation of the battery pack cover is suppressed based on a preset strategy of adding elastic members. This method solves the problems of conventional solutions for suppressing abnormal noise caused by abnormal cover deformation, such as the high cost and weight, and their inability to effectively suppress the noise when the cover deformation varies. The method reduces the need for cushioning materials, improves the rigidity and durability of the overall structure, and adapts to the needs of various application scenarios. It is low-cost and effectively suppresses abnormal deformation of the cover, preventing abnormal noise and mechanical damage caused by collision with the vehicle floor.

[0037] Specifically, Figure 1 This is a flow chart of a method for suppressing abnormal noise when a battery pack cover is deformed, provided in an embodiment of the present application.

[0038] like Figure 1 As shown, the method for suppressing abnormal noise when the battery pack cover is deformed includes the following steps:

[0039] In step S101 , the current pressure of the battery pack is obtained.

[0040] In step S102 , the current pressure is input into a pressure-deformation prediction model to obtain a predicted deformation of the battery pack cover.

[0041] Optionally, in some embodiments, the pressure-deformation prediction model is:

[0042]

[0043] Among them, δ max is the maximum deformation, α is the plate coefficient, P int is the internal pressure of the battery pack, P ext is the ambient atmospheric pressure, L is the length of the short side of the box cover, E is the elastic modulus of the box cover material, and t is the thickness of the box cover.

[0044] Specifically, distributed temperature sensors are arranged on the module data acquisition board inside the battery pack to collect the temperature changes of the battery cells under different working conditions. At the same time, a pressure sensor is installed inside the battery pack to monitor the pressure changes inside the battery pack in real time. The temperature sensor is a PT1000 thin film type with an accuracy of ±0.5°C. It is integrated on the CCS. The pressure sensor has a range of 0-5kPa and is set in the power battery energy area.

[0045] Furthermore, the pressure data at different temperatures inside the battery pack are collected by temperature sensors and pressure sensors. The pressure data at different temperatures are used as data for building a pressure-deformation prediction model. According to the different pressure and temperature data inside the battery pack, the curves of pressure changes at different temperatures are obtained, such as Figure 2 As shown, a pressure-deformation prediction model is obtained by simulation using a preset finite element simulation software (such as Abaqus), and a high-order hexahedral unit (size ≤ 2 mm) is used in the box cover area.

[0046] The current pressure is further input into the pressure-deformation prediction model to obtain the deformation prediction of the battery pack cover.

[0047] In step S103 , when the predicted deformation of the battery pack is greater than or equal to a preset threshold, the deformation of the battery pack cover to generate abnormal noise is suppressed based on a preset elastic member strategy.

[0048] In some embodiments, the preset threshold is the gap value between the battery pack cover and the vehicle body floor.

[0049] Specifically, the structural diagram of the battery pack cover and the vehicle body bottom plate is as follows: Figure 3 shown.

[0050] It is understandable that if the maximum deformation of the battery pack cover δ max If the maximum deformation of the battery pack cover is greater than or equal to the gap between the battery pack cover and the vehicle body floor, it is necessary to add elastic parts to the upper cover of the box to suppress the deformation of the box cover and prevent collision with the vehicle floor under low temperature and fast charging conditions. max If the gap is smaller than the gap between the battery pack cover and the vehicle body floor, there is no need to stick the elastic part.

[0051] Optionally, in some embodiments, the deformation of the battery pack cover and the generation of abnormal noise are suppressed based on a preset strategy of adding elastic parts, including: using preset finite element software to simulate the deformation cloud map of different areas of the battery pack cover; determining the deformation amount of different areas based on the deformation cloud map, and locating the support point position of the elastic part in the battery pack cover according to the deformation amount of different areas and the preset threshold value, and pasting the elastic part according to the support point position.

[0052] In some embodiments, the thickness of the elastic member is determined by the deformation of the supporting point of the elastic member in the battery pack cover.

[0053] In the embodiment of the present application, the elastic member is silicone foam.

[0054] Specifically, the finite element software is used to simulate the deformation cloud diagrams of different areas of the battery box cover according to the pressure-deformation prediction model, such as Figure 4 As shown, we can know the deformation of the upper cover area of ​​the electric vehicle under different low-temperature fast charging conditions. By analyzing the size of the deformation, we can help determine whether abnormal noise will occur and the resilience and thickness of the supporting materials used in different areas.

[0055] Based on the deformation cloud maps of different areas of the battery pack cover, the deformation of each area is determined. Silicone foam with appropriate density, compression ratio, and thickness is selected to suppress deformation of the cover and prevent contact with the vehicle's floor panel under high pressure. The thickness of the silicone foam varies depending on the deformation of different areas (adjustable range: 5-25mm).

[0056] Further, for the position arrangement of the silicone foam, the deformation of different areas is obtained according to the deformation cloud map. If the deformation of different areas is greater than or equal to the preset threshold, the support point position of the silicone foam is located to ensure the regional consistency of the box cover deformation under actual working conditions. The support point position is as follows: Figure 5 shown.

[0057] Furthermore, the deformation cloud map of different areas of the battery pack cover is mapped to the 3D model data of the battery pack cover, and the pasting position of the silicone foam is made corresponding to the 3D data position of the cover. This ensures that the silicone foam is accurately pasted in the area where deformation may occur.

[0058] Optionally, in some embodiments, after suppressing the deformation of the battery pack cover and generating abnormal noise based on a preset strategy of adding elastic parts, it includes: monitoring the compression of the elastic parts; and triggering a warning signal when the compression of the elastic parts is greater than a preset threshold.

[0059] Specifically, the displacement sensor collects the real-time compression of the silicone foam and transmits the real-time compression to the ECU.

[0060] The warning threshold for silicone foam compression is determined based on the material properties and durability requirements of the silicone foam and the design clearance of the battery pack. For example, the warning threshold can be set at 20% of the original thickness of the silicone foam (i.e., for a 10mm thick silicone foam, the warning threshold is 2mm). The warning threshold can be dynamically adjusted based on actual operating conditions and test data to optimize the sensitivity and accuracy of the warning system.

[0061] The ECU compares the real-time monitored silicone foam compression with the preset threshold.

[0062] When the compression of the silicone foam exceeds a preset threshold, the ECU triggers a warning signal. The warning signal can be displayed on the vehicle display, sounded, or sent to the vehicle display terminal or the owner's mobile phone app via remote communication methods (such as CAN bus, 4G / 5G network).

[0063] In order to enable those skilled in the art to further understand the method for suppressing abnormal noise when the battery pack cover is deformed according to the embodiment of the present application, the following is a detailed description with reference to specific embodiments. Figure 6 shown.

[0064] First, pressure sensors and temperature sensors are arranged inside the battery pack to collect pressure data at different temperatures.

[0065] Furthermore, a pressure-deformation prediction model is constructed using different pressure data inside the battery pack.

[0066] Compare the maximum deformation of the box cover with the preset threshold, and determine whether the maximum deformation of the box cover is less than the preset threshold (the preset threshold is the gap value between the battery pack box cover and the vehicle body floor).

[0067] Finally, if the maximum deformation of the box cover is less than the preset threshold, there is no need to paste the silicone foam. Otherwise, silicone foam of appropriate hardness is selected according to the size of the deformation, and the pressure-deformation prediction model is used to simulate the deformation cloud map of different areas of the box cover. The support point position is determined according to the deformation and the preset threshold, and the silicone foam is pasted according to the support point position.

[0068] In summary, the embodiments of the present application have the following advantages compared with the prior art:

[0069] ① The traditional solution uses integral reinforcement ribs or thickened cover design, which results in a 10%-15% weight increase, which conflicts with the lightweight demand and is also costly. ② The traditional cover is reinforced by thickness or formed ribs, and the strength of the cover is consistent. This is not suitable for all working conditions, and the pressure changes inside the battery pack affect the deformation of the cover.

[0070] This application:

[0071] 1. The pressure-deformation prediction model calculates the deformation of the box cover. Based on the simulated box cover deformation cloud map, the deformation area of ​​the cover can be accurately found and the position matrix of the supporting foam can be generated;

[0072] 2. Deploy support on demand: Only place support foam in the critical area (accounting for <30%) where δ_max > gap Δ, and control the weight increase within 0.2-0.3kg kg (traditional solutions are generally 0.8-1.2kg);

[0073] 3. Adaptive adjustment: Since the supporting foam has good compression resilience, it can adapt to the pressure changes inside the box under different working conditions and suppress the deformation of the upper cover;

[0074] 4. Since silicone foam is light, it meets the requirements of lightweight. Silicone foam has strong resistance to permanent deformation and can meet the durability requirements of the entire vehicle.

[0075] According to the method for suppressing abnormal noise when the battery pack cover is deformed, as proposed in an embodiment of the present application, the current pressure of the battery pack is obtained; the current pressure is input into a pressure-deformation prediction model to obtain a predicted deformation of the battery pack cover; when the predicted deformation of the battery pack is greater than or equal to a preset threshold, the deformation of the battery pack cover is suppressed based on a preset strategy of adding elastic members. This solves the problem that the existing solutions for suppressing abnormal noise caused by abnormal deformation of the cover are high in cost and weight, and cannot effectively suppress abnormal noise when the cover deformation varies. It also reduces the need for buffering materials, improves the rigidity and durability of the overall structure, adapts to the needs of various application scenarios, is low in cost, effectively suppresses abnormal deformation of the cover, and avoids abnormal noise and mechanical damage caused by collision with the vehicle floor.

[0076] Next, a device for suppressing abnormal noise when a battery pack cover is deformed according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0077] Figure 7 2 is a block diagram of a device for suppressing abnormal noise when a battery pack cover is deformed according to an embodiment of the present application.

[0078] like Figure 7 As shown, the abnormal noise suppression device 10 when the battery pack cover is deformed includes: an acquisition module 100, a prediction module 200 and a control module 300.

[0079] Among them, the acquisition module 100 is used to obtain the current pressure of the battery pack; the prediction module 200 is used to input the current pressure into the pressure-deformation prediction model to obtain the deformation prediction of the battery pack cover; the control module 300 is used to suppress the deformation of the battery pack cover and produce abnormal noise based on the preset elastic part addition strategy when the deformation prediction of the battery pack is greater than or equal to the preset threshold.

[0080] Optionally, in some embodiments, the control module 300 is further used to: simulate the deformation cloud map of different areas of the battery pack cover using preset finite element software; determine the deformation amount of different areas based on the deformation cloud map, and locate the support point position of the elastic part in the battery pack cover according to the deformation amount of different areas and the preset threshold value, so as to paste the elastic part according to the support point position.

[0081] Optionally, in some embodiments, the pressure-deformation prediction model is:

[0082]

[0083] Among them, δ max is the maximum deformation, α is the plate coefficient, P int is the internal pressure of the battery pack, P ext is the ambient atmospheric pressure, L is the length of the short side of the box cover, E is the elastic modulus of the box cover material, and t is the thickness of the box cover.

[0084] Optionally, in some embodiments, after suppressing the deformation of the battery pack cover and generating abnormal noise based on a preset strategy of adding elastic parts, the control module 300 is further used to: monitor the compression of the elastic parts; and trigger an early warning signal when the compression of the elastic parts is greater than a preset threshold.

[0085] Optionally, in some embodiments, the preset threshold is a gap value between the battery pack cover and the vehicle body floor.

[0086] Optionally, in some embodiments, the thickness of the elastic member is determined by the deformation of the supporting point of the elastic member in the battery pack cover.

[0087] It should be noted that the above explanation of the embodiment of the method for suppressing abnormal noise when the battery pack cover is deformed is also applicable to the device for suppressing abnormal noise when the battery pack cover is deformed in this embodiment, and will not be repeated here.

[0088] According to the device for suppressing abnormal noise when the battery pack cover is deformed, as proposed in an embodiment of the present application, the current pressure of the battery pack is obtained; the current pressure is input into a pressure-deformation prediction model to obtain a predicted deformation of the battery pack cover; and when the predicted deformation of the battery pack is greater than or equal to a preset threshold, the abnormal noise caused by deformation of the battery pack cover is suppressed based on a preset strategy of adding elastic members. This solves the problem that the conventional solution for suppressing abnormal noise caused by abnormal deformation of the cover is high in cost and weight, and cannot effectively suppress abnormal noise when the cover deformation varies. It also reduces the need for buffering materials, improves the rigidity and durability of the overall structure, adapts to the needs of various application scenarios, is low in cost, effectively suppresses abnormal deformation of the cover, and avoids abnormal noise and mechanical damage caused by collision with the vehicle floor.

[0089] Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device may include:

[0090] A memory 801 , a processor 802 , and a computer program stored in the memory 801 and executable on the processor 802 .

[0091] When the processor 802 executes the program, the method for suppressing abnormal noise when the battery pack cover is deformed provided in the above embodiment is implemented.

[0092] Furthermore, the electronic device further includes:

[0093] The communication interface 803 is used for communication between the memory 801 and the processor 802 .

[0094] The memory 801 is used to store computer programs that can be run on the processor 802.

[0095] The memory 801 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0096] If the memory 801, processor 802, and communication interface 803 are implemented independently, the communication interface 803, memory 801, and processor 802 can be interconnected via a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 8 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0097] Optionally, in a specific implementation, if the memory 801, the processor 802 and the communication interface 803 are integrated on a chip, the memory 801, the processor 802 and the communication interface 803 can communicate with each other through an internal interface.

[0098] The processor 802 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0099] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the method for suppressing abnormal noise when the battery pack cover is deformed as described above is implemented.

[0100] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0101] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, "N" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0102] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0103] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable storage medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable storage medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable storage media include the following: an electrical connection with one or N wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable storage medium may even be paper or other suitable medium on which the program is printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner as necessary, and then stored in a computer memory.

[0104] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiment, the N steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0105] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0106] In addition, the functional units in the various embodiments of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into a module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0107] The computer-readable storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application. Persons skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A method for suppressing abnormal noise when a battery pack cover is deformed, characterized in that: The following steps are involved: Get the current pressure of the battery pack; Inputting the current pressure into a pressure-deformation prediction model to obtain a predicted deformation of the battery pack cover; When the predicted deformation amount of the battery pack is greater than or equal to a preset threshold, the deformation of the battery pack cover to generate abnormal noise is suppressed based on a preset strategy of adding elastic parts.

2. The method according to claim 1, characterized in that The method of suppressing the deformation of the battery pack cover and generating abnormal noise based on the preset strategy of adding elastic members includes: Use the preset finite element software to simulate the deformation cloud map of different areas of the battery pack cover; The deformation amount of different areas is determined based on the deformation cloud map, and the support point position of the elastic part in the battery pack box cover is located according to the deformation amount of different areas and the preset threshold, and the elastic part is pasted according to the support point position.

3. The method according to claim 1, characterized in that The pressure-deformation prediction model is: Among them, δ max is the maximum deformation, α is the plate coefficient, P int is the internal pressure of the battery pack, P ext is the ambient atmospheric pressure, L is the length of the short side of the box cover, E is the elastic modulus of the box cover material, and t is the thickness of the box cover.

4. The method according to claim 1, wherein After suppressing the abnormal noise generated by deformation of the battery pack cover based on the preset strategy of adding elastic members, the method includes: Monitor the compression of elastic parts; When the compression amount of the elastic member is greater than a preset threshold, a warning signal is triggered.

5. The method according to claim 1, wherein The preset threshold is the gap value between the battery pack cover and the vehicle body floor.

6. The method according to claim 2, characterized in that The thickness of the elastic member is determined by the deformation of the supporting point of the elastic member in the battery pack cover.

7. A device for suppressing abnormal noise when a battery pack cover is deformed, characterized in that: include: The acquisition module is used to obtain the current pressure of the battery pack; A prediction module, configured to input the current pressure into a pressure-deformation prediction model to obtain a predicted deformation of the battery pack cover; The control module is used to suppress the deformation of the battery pack cover and generate abnormal noise based on a preset strategy of adding elastic parts when the predicted deformation of the battery pack is greater than or equal to a preset threshold.

8. The device according to claim 7, characterized in that The control module is further configured to: Use the preset finite element software to simulate the deformation cloud map of different areas of the battery pack cover; The deformation amount of different areas is determined based on the deformation cloud map, and the support point position of the elastic part in the battery pack box cover is located according to the deformation amount of different areas and the preset threshold value, so that the elastic part is pasted according to the support point position.

9. An electronic device, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the abnormal noise suppression method when the battery pack cover is deformed as described in any one of claims 1 to 6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the method for suppressing abnormal noise when the battery pack cover is deformed as described in any one of claims 1 to 6.

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