CN111947871A - Battery pack durability testing method and device and computer equipment - Google Patents
Battery pack durability testing method and device and computer equipment Download PDFInfo
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- CN111947871A CN111947871A CN202010771394.6A CN202010771394A CN111947871A CN 111947871 A CN111947871 A CN 111947871A CN 202010771394 A CN202010771394 A CN 202010771394A CN 111947871 A CN111947871 A CN 111947871A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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Abstract
The embodiment of the invention provides a method and a device for testing the durability of a battery pack and computer equipment, and relates to the field of electric vehicle testing. The method for testing the durability of the battery pack comprises the steps of firstly determining the maximum distance between the battery pack and the whole vehicle during assembly; then, simulating based on the maximum distance to obtain a vibration test working condition for testing the durability of the battery pack in the limit loading state; the vibration test working condition is an assembly working condition when the stress of the battery pack is maximum. The embodiment of the invention can simulate the endurance test of the electric vehicle with the battery pack in the limit loading state, and compared with the test mode of directly carrying out the vibration test on the battery pack on the battery vibration table in the prior art, the test method can simulate the whole vehicle motion working condition of the battery pack in the limit loading state, carry out targeted whole vehicle vibration test on the battery pack, improve the test accuracy and shorten the test period.
Description
Technical Field
The invention relates to the field of electric vehicles, in particular to a method and a device for testing the durability of a battery pack and computer equipment.
Background
On the premise of environmental protection and sustainable development of energy utilization, the oil-powered electric vehicle is different from the traditional fuel-powered vehicle which takes petroleum as energy and the electric vehicle which takes a power battery as energy, and a power battery high-voltage system and some special low-voltage electric systems are added. The electric automobile becomes a hot point of current automobile field research due to the characteristics of environmental protection and energy conservation, and is also a direction of future automobile science and technology development.
At present, for the durability test of the battery PACK, a battery vibration table is mainly used for carrying out a simple vibration test of a battery cell or a battery PACK (PACK) in the prior art.
However, the above prior art mainly has the following problems: the performance of the actual loading state cannot be reflected, so that the test accuracy is low, multiple times of adjustment and test are needed, and the test period is long.
Disclosure of Invention
The invention aims to provide a battery pack durability testing method, a battery pack durability testing device and computer equipment, which are used for solving the problems of long testing period and low testing accuracy in the prior art.
In a first aspect, an embodiment of the present invention provides a method for testing durability of a battery pack, where the method includes:
determining the maximum distance between the battery pack and the whole vehicle during assembly;
simulating based on the maximum distance to obtain a vibration test working condition for testing the durability of the battery pack in the limit loading state; and the vibration test working condition is an assembly working condition when the stress of the battery pack is maximum.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the step of determining a maximum distance between a battery pack and a finished vehicle when the battery pack is assembled with the finished vehicle includes:
acquiring a first tolerance of a battery pack lifting lug and a second tolerance of the whole vehicle;
and calculating the maximum distance between the battery pack and the whole vehicle when the battery pack is assembled on the basis of the first tolerance and the second tolerance.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the step of performing simulation based on the maximum distance to obtain a vibration test condition for a durability test of the battery pack in an extreme loading state includes:
inputting the maximum distance into a computer aided engineering for battery pack simulation analysis to carry out simulation, and obtaining the position of the maximum stress point of the battery pack;
and generating the vibration test working condition based on the position of the maximum stress point of the battery pack.
With reference to the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the method further includes:
designing a battery pack vibration tool to simulate the vibration test working condition;
and carrying out a vibration test under the vibration test working condition to determine whether the battery pack meets the durability of the whole vehicle.
With reference to the third possible implementation manner of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where designing a battery pack vibration tool to simulate the vibration test working condition includes:
and adjusting the distance between the battery pack and the vibration platform in a manner of adding the gasket, and enabling the distance between the battery pack and the vibration platform to be the maximum distance.
With reference to the fourth possible implementation manner of the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, wherein the vibration platform is made of a rigid material.
With reference to the third possible implementation manner of the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where the vibration test condition includes a location of a battery stress maximum point;
carry out the vibration test under the vibration test operating mode, include:
arranging a stress sensor at the position of the maximum stress point of the battery pack;
vibration tests were carried out according to GB/T31467.3.
With reference to the sixth possible implementation manner of the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, where the method further includes:
when the shell of the battery pack is not damaged after the vibration test and the numerical value of the stress sensor is smaller than the tensile strength of the material, the battery pack is judged to meet the durability of the whole vehicle.
In a second aspect, an embodiment of the present invention provides a device for testing durability of a battery pack, where the device includes:
the determining module is used for determining the maximum distance between the battery pack and the whole vehicle during assembly;
the simulation module is used for carrying out simulation based on the maximum distance to obtain a vibration test working condition for testing the durability of the battery pack in the limit loading state; and the vibration test working condition is an assembly working condition when the stress of the battery pack is maximum.
In a third aspect, an embodiment of the present invention provides a computer device, which is applied to simulation of a vibration test of a battery pack complete vehicle, and includes a processor and a machine-readable storage medium, where the machine-readable storage medium stores machine-executable instructions that can be executed by the processor, and the processor executes the machine-executable instructions to implement the method described in any one of the foregoing embodiments.
In a fourth aspect, embodiments of the invention provide a machine-readable storage medium having stored thereon machine-executable instructions that, when invoked and executed by a processor, cause the processor to implement a method as in any one of the preceding embodiments.
According to the method, the device, the computer equipment and the machine-readable storage medium for testing the durability of the battery pack, provided by the embodiment of the invention, the maximum distance between the battery pack and the whole vehicle during assembly is firstly determined; then, simulating based on the maximum distance to obtain a vibration test working condition for testing the durability of the battery pack in the limit loading state; the vibration test working condition is an assembly working condition when the stress of the battery pack is maximum. The embodiment of the invention can simulate the endurance test of the electric vehicle with the battery pack in the limit loading state, and compared with the test mode of directly carrying out the vibration test on the battery pack on the battery vibration table in the prior art, the test method can simulate the whole vehicle motion working condition of the battery pack in the limit loading state, carry out targeted whole vehicle vibration test on the battery pack, improve the test accuracy and shorten the test period.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a flowchart illustrating a method for testing durability of a battery pack according to an embodiment of the present invention;
fig. 2 is a flow chart illustrating another method for testing the durability of a battery pack according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a device for testing durability of a battery pack according to an embodiment of the present invention;
fig. 4 shows a schematic diagram of a computer device provided by an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
At present, for the durability test of the battery pack, the battery vibration table is mainly used for carrying out a simple vibration test on the battery pack or a battery monomer in the prior art, which is greatly different from an actual road vibration test carried on a whole vehicle by the battery pack, and the whole vehicle performance of the electric vehicle cannot be accurately reflected.
Based on this, the embodiment of the invention provides a method and a device for testing the durability of a battery pack and computer equipment, which can solve the problems of long test period and low test accuracy in the prior art, shorten the test period and improve the test accuracy.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Fig. 1 shows a flowchart of a method for testing durability of a battery pack according to an embodiment of the present invention. Referring to fig. 1, the present embodiment provides a method for testing durability of a battery pack, including the following steps:
step S101, determining the maximum distance between a battery pack and the whole vehicle during assembly;
the maximum distance refers to the limit installation distance of the installation surface when the battery pack and the whole vehicle are assembled; for example, the maximum distance between the battery pack and the whole vehicle when the battery pack is assembled or the maximum distance between the battery pack and the whole vehicle when the battery pack is assembled, which receives the user input, can be obtained through calculation.
In an alternative embodiment, the step S101 mainly includes the following steps:
1. acquiring a first tolerance of a battery pack lifting lug and a second tolerance of the whole vehicle;
2. and calculating the maximum distance between the battery pack and the whole vehicle when the battery pack is assembled on the basis of the first tolerance and the second tolerance.
And calculating to obtain the maximum distance between the battery pack and the whole vehicle during assembly through the tolerance of the lifting lug and the whole vehicle body on the mounting surface.
Consider the problem of how to calculate the maximum spacing for different numbers of lugs of the battery pack.
In an alternative embodiment, the method further comprises: acquiring the installation number and the installation position of battery pack lifting lugs;
when only one lug is installed to the battery package, above-mentioned confirm PACK and the biggest clearance of whole car assembly, include: and acquiring the lower tolerance of the mounting surface of the lifting lug and the upper tolerance of the mounting surface of the whole vehicle body, and calculating to obtain the maximum distance based on the lower tolerance of the lifting lug and the upper tolerance of the whole vehicle.
When at least three adjacent lifting lugs (such as 3, 5, 7 and the like) are installed on the battery pack, acquiring the lower tolerance of the middle lifting lug installation surface, the upper tolerance of the whole vehicle body installation surface corresponding to the middle lifting lug, the upper tolerances of the lifting lug installation surfaces on two sides and the lower tolerances of the whole vehicle body installation surface corresponding to the lifting lugs on two sides respectively; and obtaining the maximum distance based on the tolerances, for example, adding all the tolerances to obtain the maximum distance or taking the distance between the middle lifting lug and the whole vehicle body when being assembled as the maximum distance.
Step S102, carrying out simulation based on the maximum distance to obtain a vibration test working condition for testing the durability of the battery pack in the limit loading state; the vibration test working condition is an assembly working condition when the stress of the battery pack is maximum.
The limit loading state refers to a state when the battery pack and the whole vehicle are assembled at the maximum distance; the vibration test condition comprises the position of the stress maximum point of the battery pack, and the position of the stress maximum point of the battery pack can be the installation position of a stress maximum lifting lug in the battery pack.
In an alternative embodiment, the step S102 may be performed by:
inputting the maximum distance into a Computer Aided Engineering (CAE) for battery pack simulation analysis to simulate to obtain the position of the maximum stress point of the battery pack;
computer Aided Engineering (CAE) for battery pack simulation analysis, where the position of the stress maximum point of the battery pack refers to the mounting position of the stress maximum lifting lug in the battery pack.
In order to avoid errors of the simulation result, the simulation result is more reliable and accurate. In an optional embodiment, when performing CAE simulation, the method may further include: acquiring the material of the battery pack on the mounting surface (such as the material of a lifting lug), the material of the whole vehicle body on the mounting surface and the maximum torque of a bolt for fixing the battery pack on the whole vehicle by using the bolt; and then inputting the maximum torque of the bolt, the material of the whole vehicle body on the mounting surface, the material of the battery pack on the mounting surface and the maximum distance into a built CAE model as input parameters, and outputting the mounting position of a lifting lug with the maximum stress in the battery pack by the CAE.
The mounting position of the lifting lug with the maximum stress in the battery pack is not necessarily the same as the position of the lifting lug with the maximum distance between the mounting surfaces of the whole vehicle body; in addition, it should be understood that the specific process of CAE simulation may be performed with reference to the prior art, and will not be described in detail herein.
And B, generating a vibration test working condition based on the position of the maximum stress point of the battery pack.
In other embodiments, the vibration test conditions may include the maximum torque of the bolt, the distance between all lifting lugs and the vehicle body, the lifting lug material, and the like, in addition to the position of the maximum stress point of the battery pack.
The method for testing the durability of the battery pack comprises the steps of determining the maximum distance between the battery pack and the whole vehicle during assembly; carrying out simulation based on the maximum distance to obtain a vibration test working condition for testing the durability of the battery pack in the limit loading state; the vibration test working condition is the assembly working condition when the stress of the battery pack is maximum, the embodiment of the invention can simulate the endurance test of the electric automobile with the battery pack in the limit loading state, and compared with the test mode that the battery pack is directly subjected to the vibration test on the battery vibration table in the prior art, the test accuracy is improved and the test period is shortened because the whole automobile motion working condition of the battery pack in the limit loading state can be simulated, so that the vibration test is designed for the vibration tool to carry out the targeted whole automobile vibration test (under the limit working condition) on the battery pack in the vibration test.
Fig. 2 is a flowchart illustrating another method for testing the durability of a battery pack according to an embodiment of the present invention.
Referring to fig. 2, the method for testing the durability of the battery pack includes:
step S201, determining the maximum distance between a battery pack and the whole vehicle during assembly;
step S202, carrying out simulation based on the maximum distance to obtain a vibration test working condition for testing the durability of the battery pack in the limit loading state; the vibration test working condition is an assembly working condition when the stress of the battery pack is maximum;
step S203, designing a battery pack vibration tool to simulate vibration test working conditions;
in an alternative embodiment, the step S203 includes:
a, adjusting the distance between the battery pack and the vibration platform in a mode of adding the gasket, and enabling the distance between the battery pack and the vibration platform to be the maximum distance.
The gasket is mainly used for adjusting the distance between the battery pack and the vibration platform so as to ensure that the durability test environment is matched with the vibration test working condition.
Considering that different vehicle body materials are different, how to improve the reliability and the adaptability of the endurance test result to a real scene.
In an optional embodiment, the vibration platform is made of a rigid material, and the vibration platform is designed to be the rigid platform, so that a vibration test of the vibration platform is performed in a harsher environment due to the fact that the rigid platform is not deformed, and the durability of the whole battery pack is higher.
And step S204, performing a vibration test under the vibration test working condition to determine whether the battery pack meets the durability of the whole vehicle.
Wherein the vibration test working condition comprises the position of the maximum stress point of the battery.
In an alternative embodiment, the step S204 may be performed by:
1) arranging a stress sensor at the position of the maximum stress point of the battery pack;
stress values of the battery pack at a maximum stress point (a dangerous point easy to damage) of the battery pack in a vibration test process are collected through a stress sensor and used as indexes for judging whether the battery pack meets the requirement of durability in a limit loading state.
In an alternative embodiment, the stress sensor described above may be a strain gauge.
2) Vibration tests were carried out according to GB/T31467.3.
Whether the battery pack meets the durability requirement of the whole vehicle in the limit loading state can be judged according to the vibration test result.
And S205, judging that the battery pack meets the durability of the whole vehicle when the shell of the battery pack is not damaged after the vibration test and the numerical value of the stress sensor is smaller than the tensile strength of the material.
The tensile strength of the material refers to the tensile strength of the material of the lug with the highest stress on the mounting surface.
Specifically, after the vibration test, firstly determining whether the inside and the outside of the battery pack are damaged, for example, judging whether the outside of the battery pack is damaged or not through appearance, judging whether the inside of the battery pack is damaged or not through a sealing test, if the airtightness is good, the inside is not damaged, opening a battery pack shell to confirm whether internal parts are damaged again, and if the battery pack is not damaged and a pressure value detected by a stress sensor is smaller than the tensile strength of a material, judging that the durability condition of the whole vehicle is met in the limit loading state of the battery pack; otherwise, the durability condition of the whole vehicle is not met.
According to the battery PACK durability testing method provided by the embodiment of the invention, whether the durability condition of the whole vehicle is met under the PACK limit loading state is verified by designing the vibration tool and performing the vibration test on the vibration platform according to the vibration test working condition (limit working condition) obtained by simulation, the test result can reflect the whole vehicle performance of the electric vehicle under the limit loading state, and the test result is more reliable.
On the basis of the above embodiments, the embodiment of the present invention further provides a device for testing durability of a battery pack, as shown in fig. 3, the device includes a determining module 301 and a simulating module 302.
The determining module 301 is configured to determine a maximum distance between the battery pack and the whole vehicle during assembly;
the simulation module 302 is used for performing simulation based on the maximum distance to obtain a vibration test working condition for durability test of the battery pack in an extreme loading state; and the vibration test working condition is an assembly working condition when the stress of the battery pack is maximum.
In an alternative embodiment, the determining module 301 is configured to obtain a first tolerance of a lifting lug of the battery pack and a second tolerance of the finished vehicle when determining the maximum distance between the battery pack and the finished vehicle during assembly; and calculating the maximum distance between the battery pack and the whole vehicle when the battery pack is assembled on the basis of the first tolerance and the second tolerance.
In an optional embodiment, the simulation module 302 is configured to, when performing simulation based on the maximum distance to obtain a vibration test working condition for a durability test of the battery pack in an extreme loading state, input the maximum distance to a computer aided engineering for simulation analysis of the battery pack to perform simulation to obtain a position of a maximum stress point of the battery pack; and generating the vibration test working condition based on the position of the maximum stress point of the battery pack.
In an alternative embodiment, the apparatus further comprises: the vibration test module is used for designing a battery pack vibration tool to simulate the vibration test working condition; and carrying out a vibration test under the vibration test working condition to determine whether the battery pack meets the durability of the whole vehicle.
In an optional implementation mode, the vibration test module is used for adjusting the distance between the battery pack and the vibration platform in a manner of adding a gasket when the battery pack vibration tool is designed to simulate the vibration test working condition, and the distance between the battery pack and the vibration platform is the maximum distance.
In an alternative embodiment, the vibration table is made of a rigid material.
In an alternative embodiment, the vibration test condition comprises a location of a point of maximum stress of the battery;
in an optional embodiment, the vibration test module is used for arranging the stress sensor at the position of the maximum stress point of the battery pack when performing a vibration test under the vibration test working condition; vibration tests were carried out according to GB/T31467.3.
In an alternative embodiment, the apparatus further comprises: and the judging module is used for judging whether the shell of the battery pack is damaged or not after the vibration test and judging whether the numerical value of the stress sensor is smaller than the tensile strength of the material or not when the shell of the battery pack is not damaged after the vibration test.
The following briefly describes the operation of the device for testing the durability of a battery pack according to an embodiment of the present invention: firstly, calculating the maximum gap between PACK and the assembly limit of the whole vehicle; simulating the PACK and the CAE of the maximum clearance assembly of the vehicle body; the CAE judges the assembly working condition when the PACK stress is maximum, and the working condition is taken as the vibration test working condition; through the process, a theoretical result of the battery pack in the limit loading state is obtained through simulation.
Designing a vibration tool, and simulating the assembly working condition obtained by theoretical simulation by adding a gasket; and the stress sensor is arranged at the simulated stress maximum point; and vibration test is carried out according to GB 31467.3; the shell is not damaged after vibration, the numerical value of the strain gauge is less than the tensile strength of the material, and the pre-judged PACK meets the durability of the whole vehicle, otherwise, the PACK does not meet the durability.
The device for testing the durability of the battery pack provided by the embodiment of the invention can be specific hardware on equipment or software or firmware installed on the equipment. The device provided by the embodiment of the present invention has the same implementation principle and technical effect as the method embodiments, and for the sake of brief description, reference may be made to the corresponding contents in the method embodiments without reference to the device embodiments.
Referring to fig. 4, an embodiment of the present invention further provides a computer device 400, including: a processor 401, a memory 402, a bus 403 and a communication interface 404, wherein the processor 401, the communication interface 404 and the memory 402 are connected through the bus 403; the memory 402 is used to store programs; the processor 401 is configured to call a program stored in the memory 402 through the bus 403 to execute the vehicle control method of the above-described embodiment.
The Memory 402 may include a high-speed Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface 404 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, and the like can be used.
Bus 403 may be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 4, but that does not indicate only one bus or one type of bus.
The memory 402 is used for storing a program, the processor 401 executes the program after receiving an execution instruction, and the method executed by the apparatus defined by the flow process disclosed in any of the foregoing embodiments of the present invention may be applied to the processor 401, or implemented by the processor 401.
The processor 401 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 401. The Processor 401 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 402, and the processor 401 reads the information in the memory 402 and completes the steps of the method in combination with the hardware.
Embodiments of the present invention also provide a machine-readable storage medium storing machine-executable instructions that, when invoked and executed by a processor, cause the processor to implement a vehicle control method as above.
In the description of the present invention, it should be noted that the terms "first", "second", "third", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (11)
1. A method for testing the durability of a battery pack is characterized by comprising the following steps:
determining the maximum distance between the battery pack and the whole vehicle during assembly;
simulating based on the maximum distance to obtain a vibration test working condition for testing the durability of the battery pack in the limit loading state; and the vibration test working condition is an assembly working condition when the stress of the battery pack is maximum.
2. The method of claim 1, wherein the step of determining the maximum distance between the battery pack and the finished vehicle when assembled comprises:
acquiring a first tolerance of a battery pack lifting lug and a second tolerance of the whole vehicle;
and calculating the maximum distance between the battery pack and the whole vehicle when the battery pack is assembled on the basis of the first tolerance and the second tolerance.
3. The method of claim 1, wherein the step of performing a simulation based on the maximum separation distance to obtain a vibration test condition for a durability test of the battery pack in an extreme loading state comprises:
inputting the maximum distance into a computer aided engineering for battery pack simulation analysis to carry out simulation, and obtaining the position of the maximum stress point of the battery pack;
and generating the vibration test working condition based on the position of the maximum stress point of the battery pack.
4. The method of claim 1, further comprising:
designing a battery pack vibration tool to simulate the vibration test working condition;
and carrying out a vibration test under the vibration test working condition to determine whether the battery pack meets the durability of the whole vehicle.
5. The method of claim 4, wherein the step of designing a battery pack vibration tool to simulate the vibration test conditions comprises:
and adjusting the distance between the battery pack and the vibration platform in a manner of adding the gasket, and enabling the distance between the battery pack and the vibration platform to be the maximum distance.
6. The method of claim 5, wherein the vibration table is made of a rigid material.
7. The method of claim 4, wherein the vibration test condition comprises a location of a point of maximum battery stress;
the step of performing the vibration test under the vibration test working condition comprises the following steps:
arranging a stress sensor at the position of the maximum stress point of the battery pack;
vibration tests were carried out according to GB/T31467.3.
8. The method of claim 7, further comprising:
when the shell of the battery pack is not damaged after the vibration test and the numerical value of the stress sensor is smaller than the tensile strength of the material, the battery pack is judged to meet the durability of the whole vehicle.
9. A battery pack durability testing apparatus, comprising:
the determining module is used for determining the maximum distance between the battery pack and the whole vehicle during assembly;
the simulation module is used for carrying out simulation based on the maximum distance to obtain a vibration test working condition for testing the durability of the battery pack in the limit loading state; and the vibration test working condition is an assembly working condition when the stress of the battery pack is maximum.
10. A computer device for use in simulation of a vibration test of a battery pack cart, the computer device comprising a processor and a machine-readable storage medium having stored thereon machine-executable instructions executable by the processor to perform the method of any one of claims 1 to 8.
11. A machine-readable storage medium having stored thereon machine-executable instructions which, when invoked and executed by a processor, cause the processor to implement the method of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010771394.6A CN111947871B (en) | 2020-08-04 | 2020-08-04 | Battery pack durability testing method and device and computer equipment |
Applications Claiming Priority (1)
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