Power battery mounting point load analysis method, device and equipment and storage medium

Abstract

The present application belongs to the field of automobile technology, and specifically relates to a power battery mounting point load analysis method, device, equipment and storage medium. The method comprises the following steps: step one, determining input conditions; step two, simplifying a simulation analysis model; step three, defining working conditions; step four, determining constraint conditions; step five, applying loads; and step six, outputting results, finally obtaining power battery mounting point load data. The present application simplifies a power battery whole package model, simplifies a mounting point model, formulates constraint conditions, applies loads to the simplified model, and finally obtains the load conditions of the power battery under various working conditions and decomposed to each mounting point. The method can provide indispensable condition input for the number, arrangement position and structure design of subsequent mounting points, ensure that the power battery assembly can meet the durability and safety requirements, and fill the blank of the related design of mounting points in the industry.

Description

Technical Field

[0001] This invention belongs to the field of automotive technology, specifically to a method, apparatus, equipment, and storage medium for analyzing the load at the mounting point of a power battery. Background Technology

[0002] With the increasing number of cars, especially electric vehicles, the application of power batteries has become more and more widespread. The safety of power batteries has attracted widespread attention. Currently, power batteries are generally assembled into the vehicle chassis as independent components. Most of the industry adopts the overall simulation analysis of the entire pack for the structural design and simulation analysis of power battery mounting points. There is no clear method for calculating and analyzing the load of power battery mounting points. Summary of the Invention

[0003] This invention provides a method, apparatus, equipment, and storage medium for load analysis of power battery mounting points based on CATIA simulation analysis. By simplifying the power battery pack model and mounting point model, defining constraints, and applying loads to the simplified model, the load conditions of the power battery under various operating conditions, decomposed to each mounting point, are obtained. This method can provide indispensable input conditions for the subsequent design of the number, layout, and structure of mounting points, ensuring that the power battery assembly can meet durability and safety requirements, and filling the gap in the industry regarding mounting point-related design.

[0004] The technical solution of this invention is described below in conjunction with the accompanying drawings:

[0005] In a first aspect, embodiments of the present invention provide a method for analyzing the load at the mounting point of a power battery, comprising the following steps:

[0006] Step 1: Determine the input conditions;

[0007] Step 2: Simplify the simulation analysis model;

[0008] Step 3: Define the operating conditions;

[0009] Step 4: Determine the constraints;

[0010] Step 5: Apply load;

[0011] Step 6: Output the results and finally obtain the load data of the power battery mounting point.

[0012] Furthermore, in step one, the input conditions include mass characteristics and mount point coordinates;

[0013] The quality characteristics refer to the mass of the power battery assembly and the coordinates of the center of mass of the power battery assembly, which are obtained through synthesis and coordinate transformation.

[0014] The coordinates of the mounting point are obtained directly through three-dimensional data measurement.

[0015] Furthermore, the specific method for step two is as follows:

[0016] 21) The power battery assembly structure is omitted, and the power battery is simplified to a single point mass;

[0017] 22) Simplify the mounting point and bolt connection structure as a whole, and select the center point between the upper and lower mounting surfaces of the mounting point as the simplified coordinates of the mounting point.

[0018] Furthermore, the specific method for step three is as follows:

[0019] Operating Condition 1: X-axis -11g superimposed on Z-axis -1g;

[0020] Condition 2: 11g in the X direction superimposed with -1g in the Z direction;

[0021] Operating Condition 3: Y-axis -3g superimposed on Z-axis -1g;

[0022] Operating Condition 4: 3g in the Y direction superimposed with -1g in the Z direction;

[0023] Operating Condition 5: Z-axis -11g;

[0024] Operating condition 6: Z-direction 9g.

[0025] Furthermore, the specific method for step four is as follows:

[0026] Add a six-degree-of-freedom fixed constraint to the simplified coordinates of the mounting point; add a rigid connection between the simplified coordinates of the mounting point and the center of mass of the power battery assembly.

[0027] Furthermore, the specific method for step five is as follows:

[0028] The load is applied to the battery particles according to the actual load value of the power battery under each working condition.

[0029] Furthermore, the specific method for step six is ​​as follows:

[0030] Based on the data output from the simulation analysis, the forces in the X, Y, and Z directions of each mounting point are statistically analyzed. The forces in the X and Y directions are combined according to the installation direction of the standard parts to obtain the radial load; the forces in the Z direction are combined to obtain the axial load, and finally the load data of the power battery mounting point is obtained.

[0031] Secondly, embodiments of the present invention also provide a power battery mounting point load analysis device, comprising:

[0032] The input module is used to determine the input conditions;

[0033] A simplification module is used to simplify the simulation analysis model;

[0034] Define the module, used to define operating conditions;

[0035] The constraint module is used to determine the constraint conditions;

[0036] The application module is used to apply loads;

[0037] The output module is used to output the results, ultimately obtaining the load data of the power battery mounting point.

[0038] Thirdly, embodiments of the present invention also provide a computer device, including 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 a power battery mounting point load analysis method as described in any of the embodiments of the present invention.

[0039] Fourthly, embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a power battery mounting point load analysis method as described in any of the embodiments of the present invention.

[0040] The beneficial effects of this invention are as follows:

[0041] This invention simplifies the overall power battery pack model and the mounting point model, sets constraints, and applies loads to the simplified model to obtain the load conditions of the power battery at each mounting point under various operating conditions. This method can provide indispensable input conditions for the subsequent design of the number, layout, and structure of mounting points, ensuring that the power battery assembly can meet durability and safety requirements, and filling the gap in the industry regarding mounting point design. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a flowchart of a power battery mounting point load analysis method according to the present invention;

[0044] Figure 2 This is a schematic diagram of the extreme working condition of the power battery load decomposition.

[0045] Figure 3 A schematic diagram showing the coordinates of the center of mass and mounting point of the power battery assembly;

[0046] Figure 4 A simplified schematic diagram showing the coordinates of the center of mass and mounting point of the power battery assembly;

[0047] Figure 5 This is a schematic diagram of the structure of the power battery mounting point load analysis device described in this invention;

[0048] Figure 6 This is a schematic diagram of the structure of an electronic device. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0051] Example 1

[0052] Figure 1 This is a flowchart of a method for calculating and analyzing the load at the mounting point of a power battery, provided in Embodiment 1 of the present invention. This embodiment is applicable to the analysis of the load at the mounting point of a power battery. This method can be executed by the power battery mounting point load analysis device in this embodiment, which can be implemented in software and / or hardware, such as... Figure 1 As shown, the method specifically includes the following steps:

[0053] Step 1: Determine the input conditions, as follows:

[0054] Input conditions include mass characteristics and mount point coordinates;

[0055] The quality characteristics refer to the mass of the power battery assembly and the coordinates of the center of mass of the power battery assembly, i.e., the vehicle coordinate system, which are obtained through synthesis and coordinate transformation.

[0056] Wherein, the centroid coordinate of the power battery assembly is equal to the mass-weighted average of all points of the power battery assembly with respect to each coordinate.

[0057] The coordinates of the mounting point are obtained directly through three-dimensional data measurement.

[0058] See Figure 3 and Figure 4Step 2: To simplify the simulation analysis model and improve the equipment's calculation speed, the mounting points are simplified in the simulation analysis model, as follows:

[0059] 21) The ultimate goal of load decomposition at mounting points is to obtain the stress conditions at each mounting point. Since the mass distribution of the power battery assembly is relatively uniform, the weight of the power battery assembly is the load on the mounting point. Therefore, the structure of the power battery assembly is not highly correlated with the calculation results. Thus, the structure of the power battery assembly is omitted, and the power battery is simplified to a point mass.

[0060] 22) Simplify the mounting point and bolt connection structure as a whole, and select the center point between the upper and lower mounting surfaces of the mounting point as the simplified coordinates of the mounting point.

[0061] The selection of the center point is a built-in function of CATIA; theoretically, there are countless points connecting the upper and lower mounting surfaces, but apart from the center point, all of them are meaningless.

[0062] The simplification does not affect the results. In a normal bolted connection structure, there is relative slippage, elastic deformation of the bolt, and elastic deformation of the mounting point itself. Elastic deformation can disperse stress concentration. However, after simplification to the center point, it can be assumed that there is no elastic deformation. The analysis environment is more stringent than the actual situation, so the simplification can be considered not to affect the calculation results.

[0063] Step 3: Define the operating conditions;

[0064] Drawing on automotive industry experience, specific limits for load decomposition in power batteries have been defined. These limits include, for example, the load decomposition limits for power batteries. Figure 2 As shown, the specific operating conditions are as follows:

[0065] Operating Condition 1: X-axis -11g superimposed on Z-axis -1g;

[0066] Condition 2: 11g in the X direction superimposed with -1g in the Z direction;

[0067] Operating Condition 3: Y-axis -3g superimposed on Z-axis -1g;

[0068] Operating Condition 4: 3g in the Y direction superimposed with -1g in the Z direction;

[0069] Operating Condition 5: Z-axis -11g;

[0070] Operating condition 6: Z-direction 9g.

[0071] The six extreme operating conditions defined in this step represent the extreme stress conditions of the power battery in the X, Y, and Z directions under the whole vehicle environment, and can cover the extreme operating conditions of the power battery.

[0072] Step 4: Determine the constraints, the specific method is as follows:

[0073] For the load decomposition calculation of the power battery mounting point, during the analysis process, a six-degree-of-freedom fixed constraint is added to the simplified coordinates of the mounting point in step two, and a rigid connection is added between the simplified coordinates of the mounting point and the centroid of the power battery assembly. This constraint condition can clearly and easily describe the connection relationship between the power battery mounting point and the power battery assembly.

[0074] Step 5: Apply load, the specific method is as follows:

[0075] After setting the constraints, load the model. Based on the actual weight of the power battery assembly, refer to... Figure 2 The load decomposition limit conditions of the power battery are used to calculate the loads in the X, Y, and Z directions. Based on the actual load values ​​under each condition, the loads are applied to the power battery particles.

[0076] The acceleration shown in the extreme condition multiplied by the weight of the assembly particle is the load corresponding to the current condition.

[0077] Step Six: Output Results. The final result is the load data at the power battery mounting point. The specific method is as follows:

[0078] Based on the data output from the simulation analysis, the forces in the X, Y, and Z directions of each mounting point are statistically analyzed. The forces in the X and Y directions are combined according to the installation direction of the standard parts to obtain the radial load; the forces in the Z direction are combined to obtain the axial load, and finally the load data of the power battery mounting point is obtained.

[0079] In summary, this invention simplifies the overall power battery pack model and the mounting point model, establishes constraints, and applies loads to the simplified model. Ultimately, it obtains the load conditions of the power battery at each mounting point under various operating conditions. This method can provide indispensable input conditions for the subsequent design of the number, layout, and structure of mounting points, ensuring that the power battery assembly can meet durability and safety requirements, and filling the gap in the industry regarding mounting point design.

[0080] Example 2

[0081] Figure 5 This is a schematic diagram of a power battery mounting point load analysis device provided in Embodiment 2 of the present invention. This embodiment is applicable to power battery mounting point load analysis. The device can be implemented using software and / or hardware, and can be integrated into any device that provides power battery mounting point load analysis functionality. Specifically, it includes:

[0082] The input module is used to determine the input conditions;

[0083] A simplification module is used to simplify the simulation analysis model;

[0084] Define the module, used to define operating conditions;

[0085] The constraint module is used to determine the constraint conditions;

[0086] The application module is used to apply loads;

[0087] The output module is used to output the results, ultimately obtaining the load data of the power battery mounting point.

[0088] The above-described products can perform the methods provided in any embodiment of the present invention, and have the corresponding functional modules and beneficial effects for performing the methods.

[0089] Example 3

[0090] Figure 6 This is a schematic diagram of the structure of a computer device according to Embodiment 3 of the present invention. Figure 6 A block diagram of an exemplary computer device 12 suitable for implementing embodiments of the present invention is shown. Figure 6 The computer device 12 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of the present invention.

[0091] like Figure 6 As shown, the computer device 12 is represented in the form of a general-purpose computing device. The components of the computer device 12 may include, but are not limited to: one or more processors or processing units 16, system memory 28, and a bus 18 connecting different system components (including system memory 28 and processing unit 16).

[0092] Bus 18 represents one or more of several bus architectures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the various bus architectures. For example, these architectures include, but are not limited to, the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnect (PCI) bus.

[0093] Computer device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by computer device 12, including volatile and non-volatile media, removable and non-removable media.

[0094] System memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. Computer device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 34 may be used to read and write non-removable, non-volatile magnetic media (…). Figure 4 Not shown; usually referred to as a "hard drive"). Although Figure 6 Not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk") and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 via one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of the present invention.

[0095] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28. Such program modules 42 include—but are not limited to—an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. Program modules 42 typically perform the functions and / or methods described in the embodiments of the present invention.

[0096] The computer device 12 can also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), and with one or more devices that enable a user to interact with the computer device 12, and / or with any device that enables the computer device 12 to communicate with one or more other computing devices (e.g., network card, modem, etc.). This communication can be performed via the input / output (I / O) interface 22. Furthermore, in this embodiment, the display 24 of the computer device 12 is not an independent entity, but is embedded in a mirror, so that when the display surface of the display 24 is not displayed, the display surface of the display 24 and the mirror surface visually blend together. Moreover, the computer device 12 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via the network adapter 20. As shown, the network adapter 20 communicates with other modules of the computer device 12 via the bus 18. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with computer device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0097] The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, such as implementing a power battery mounting point load analysis method provided in the embodiments of the present invention.

[0098] Example 4

[0099] Embodiment 4 of the present invention provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a power battery mounting point load analysis method as provided in all embodiments of the present application.

[0100] Any combination of one or more computer-readable media may be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: 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 or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.

[0101] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including—but not limited to—electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of transmitting, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0102] The program code contained on a computer-readable medium may be transmitted using any suitable medium, including—but not limited to—wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0103] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0104] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method for analyzing the load at the mounting point of a power battery, characterized in that, Includes the following steps: Step 1: Determine the input conditions; Step 2: Simplify the simulation analysis model; Step 3: Define the operating conditions; Step 4: Determine the constraints; Step 5: Apply load; Step 6: Output the results, and finally obtain the load data of the power battery mounting point; In step one, the input conditions include mass characteristics and mount point coordinates; The quality characteristics refer to the mass of the power battery assembly and the coordinates of the center of mass of the power battery assembly, which are obtained through synthesis and coordinate transformation. The coordinates of the mounting point are obtained directly through three-dimensional data measurement. The specific method for step two is as follows: 21) Omit the power battery assembly structure and simplify the power battery to a single point mass; 22) Simplify the mounting point and bolt connection structure as a whole, and select the center point between the upper and lower mounting surfaces of the mounting point as the simplified coordinates of the mounting point; The specific method for step four is as follows: Add a six-degree-of-freedom fixed constraint to the simplified coordinates of the mounting point; add a rigid connection between the simplified coordinates of the mounting point and the center of mass of the power battery assembly.

2. The method for analyzing the load at the mounting point of a power battery according to claim 1, characterized in that, The specific method for step three is as follows: Operating Condition 1: X-axis -11g superimposed on Z-axis -1g; Condition 2: 11g in the X direction superimposed with -1g in the Z direction; Operating Condition 3: Y-axis -3g superimposed on Z-axis -1g; Operating Condition 4: 3g in the Y direction superimposed with -1g in the Z direction; Operating Condition 5: Z-axis -11g; Operating condition 6: Z-direction 9g.

3. The method for analyzing the load at the mounting point of a power battery according to claim 1, characterized in that, The specific method for step five is as follows: The load is applied to the battery particles according to the actual load value of the power battery under each working condition.

4. The method for analyzing the load at the mounting point of a power battery according to claim 1, characterized in that, The specific method for step six is ​​as follows: Based on the data output from the simulation analysis, the forces in the X, Y, and Z directions of each mounting point are statistically analyzed. The forces in the X and Y directions are combined according to the installation direction of the standard parts to obtain the radial load; the forces in the Z direction are combined to obtain the axial load, and finally the load data of the power battery mounting point is obtained.

5. The method for analyzing the load at the mounting point of a power battery according to claim 1, characterized in that, This is achieved through a power battery mounting point load analysis device, including: The input module is used to determine the input conditions; A simplification module is used to simplify the simulation analysis model; Define the module, used to define operating conditions; The constraint module is used to determine the constraint conditions; The application module is used to apply loads; The output module is used to output the results, ultimately obtaining the load data of the power battery mounting point.

6. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the power battery mounting point load analysis method as described in claim 1.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the power battery mounting point load analysis method as described in claim 1.

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