CN116467915A - Inspection method and device for wading seal of battery pack and electronic equipment - Google Patents
Inspection method and device for wading seal of battery pack and electronic equipment Download PDFInfo
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- CN116467915A CN116467915A CN202310458454.2A CN202310458454A CN116467915A CN 116467915 A CN116467915 A CN 116467915A CN 202310458454 A CN202310458454 A CN 202310458454A CN 116467915 A CN116467915 A CN 116467915A
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- 238000000034 method Methods 0.000 title claims abstract description 71
- 238000007689 inspection Methods 0.000 title claims description 13
- 230000006835 compression Effects 0.000 claims abstract description 131
- 238000007906 compression Methods 0.000 claims abstract description 131
- 239000006260 foam Substances 0.000 claims abstract description 129
- 238000007789 sealing Methods 0.000 claims abstract description 45
- 230000008569 process Effects 0.000 claims abstract description 18
- 238000004088 simulation Methods 0.000 claims abstract description 17
- 238000010168 coupling process Methods 0.000 claims abstract description 16
- 230000009471 action Effects 0.000 claims abstract description 14
- 239000007787 solid Substances 0.000 claims abstract description 13
- 230000015654 memory Effects 0.000 claims description 17
- 238000012360 testing method Methods 0.000 claims description 11
- 238000004590 computer program Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000036316 preload Effects 0.000 claims 2
- 238000004364 calculation method Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/10—Numerical modelling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/08—Fluids
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a method and a device for checking wading seal of a battery pack and electronic equipment, wherein the method comprises the following steps: simulating a process of applying a pretightening force to an upper cover plate bolt of a battery pack by adopting an implicit solver in finite element software to compress foam, and calculating a first compression rate of the foam under the action of the pretightening force; determining whether the compressed battery pack meets a preset sealing requirement or not based on the first compression rate of foam; importing the compression result into a display solver of finite element software, and simulating the wading working condition of the compressed battery pack at a preset speed by adopting a fluid-solid coupling method; under wading working conditions, calculating a second compression rate of the foam, and determining whether the compressed battery pack meets preset sealing requirements or not under the wading working conditions based on the second compression rate of the foam. According to the method for checking the wading seal of the battery pack, the tightness of the battery pack in the wading working condition can be checked in a simulation numerical calculation mode, and the cost is low.
Description
Technical Field
The invention relates to the technical field of battery packs, in particular to a method and a device for testing wading sealing of a battery pack and electronic equipment.
Background
At present, the technology of electric automobiles is mature increasingly, the battery pack is taken as a carrier of a battery module, the structural performance of the battery pack is very important, and the wading sealing capability of the battery pack is an important ring for ensuring the safety of batteries. Because of higher requirements of experimental conditions, greater cost is required to experimentally verify the wading tightness of the battery pack.
Therefore, the inspection of how to realize the wading seal of the battery pack at low cost is a technical problem to be solved at present.
Disclosure of Invention
In view of the above, the present invention aims to provide a method, a device and an electronic device for inspecting wading seal of a battery pack, so as to solve the technical problem that the wading seal inspection of the battery pack cannot be implemented with low cost in the prior art.
In a first aspect, an embodiment of the present invention provides a method for inspecting a wading seal of a battery pack, including:
simulating a process of applying a pretightening force to an upper cover plate bolt of a battery pack by adopting an implicit solver in finite element software to compress foam, and calculating a first compression rate of the foam under the pretightening force;
determining whether the compressed battery pack meets a preset sealing requirement or not based on the first compression rate of the foam;
importing the compression result into a display solver of the finite element software, and simulating the wading working condition of the compressed battery pack at a preset speed by adopting a fluid-solid coupling method;
and under the wading working condition, calculating a second compression rate of foam, and determining whether the compressed battery pack meets the preset sealing requirement or not under the wading working condition based on the second compression rate of the foam.
Further, the process of applying pretightening force to the upper cover plate bolt of the battery pack to compress foam is simulated by adopting an implicit solver in finite element software, and the method comprises the following steps:
constructing a finite element model of a battery pack, wherein the finite element model at least comprises: the upper cover plate, the bolts, the lower cover plate and the foam;
and applying a pretightening force to the bolt so as to enable the bolt to be pressed down for a preset distance, thereby completing the process of compressing the foam.
Further, calculating a first compression rate of the foam under the action of the pretightening force comprises:
under the action of the pretightening force, determining a first deformation amount at the position where the foam deformation is minimum;
and calculating the first compression rate of the foam according to the first deformation and the original length of the foam.
Further, determining whether the compressed battery pack meets a preset sealing requirement based on the first compression rate of the foam comprises:
judging whether the first compression rate of the foam is within a preset compression range or not;
if the first compression rate of the foam is within the preset compression range, determining that the compressed battery pack meets the preset sealing requirement;
if the first compression rate of the foam is not within the preset compression range, determining that the compressed battery pack does not meet the preset sealing requirement.
Further, simulating the wading condition of the compressed battery pack at a preset speed by adopting a fluid-solid coupling method comprises the following steps:
constructing a finite element model of water;
and setting the preset speed of the compressed battery pack so as to simulate the compressed battery pack to carry out wading at the preset speed.
Further, under the wading working condition, calculating a second compression rate of the foam, including:
under the wading working condition, determining a second deformation quantity at the position with the minimum deformation of the foam;
and calculating a second compression rate of the foam according to the second deformation and the original length of the foam.
Further, determining whether the compressed battery pack meets the preset sealing requirement under the wading working condition based on the second compression rate of the foam comprises:
judging whether the second compression rate of the foam is within a preset compression range or not;
if the second compression rate of the foam is within the preset compression range, determining that the compressed battery pack meets the preset sealing requirement under the wading working condition;
if the second compression rate of the foam is not in the preset compression range, determining that the compressed battery pack does not meet the preset sealing requirement under the wading working condition.
In a second aspect, an embodiment of the present invention further provides a device for inspecting a wading seal of a battery pack, including:
the pre-tightening force compression simulation unit is used for simulating a process of applying pre-tightening force to an upper cover plate bolt of the battery pack to compress foam by adopting an implicit solver in finite element software, and calculating a first compression rate of the foam under the action of the pre-tightening force;
the first determining unit is used for determining whether the compressed battery pack meets a preset sealing requirement or not based on the first compression rate of the foam;
the wading simulation unit is used for importing the compression result into a display solver of the finite element software, and simulating the wading working condition of the compressed battery pack at a preset speed by adopting a fluid-solid coupling method;
the second determining unit is used for calculating the second compression rate of the foam under the wading working condition and determining whether the compressed battery pack meets the preset sealing requirement under the wading working condition or not based on the second compression rate of the foam.
In a third aspect, an embodiment of the present invention further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the steps of the method according to any one of the first aspects when the processor executes the computer program.
In a fourth aspect, embodiments of the present invention also provide a computer-readable storage medium storing machine-executable instructions which, when invoked and executed by a processor, cause the processor to perform the method of any one of the first aspects.
In an embodiment of the invention, a method for inspecting wading seal of a battery pack is provided, which comprises the following steps: simulating a process of applying a pretightening force to an upper cover plate bolt of a battery pack by adopting an implicit solver in finite element software to compress foam, and calculating a first compression rate of the foam under the action of the pretightening force; determining whether the compressed battery pack meets a preset sealing requirement or not based on the first compression rate of foam; importing the compression result into a display solver of finite element software, and simulating the wading working condition of the compressed battery pack at a preset speed by adopting a fluid-solid coupling method; under wading working conditions, calculating a second compression rate of the foam, and determining whether the compressed battery pack meets preset sealing requirements or not under the wading working conditions based on the second compression rate of the foam. According to the method for testing the wading seal of the battery pack, disclosed by the invention, the tightness test of the battery pack in the wading working condition can be realized in a simulation numerical calculation mode, the cost is low, and the technical problem that the wading seal test of the battery pack cannot be realized at low cost in the prior art is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for inspecting wading seal of a battery pack according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing a comparison of the foam before and after compression according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a compressed battery pack according to an embodiment of the present invention under wading conditions;
fig. 4 is a schematic diagram of a testing device for wading seal of a battery pack according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The prior art cannot realize the wading sealing inspection of the battery pack with low cost.
Based on the method, in the method for checking the wading seal of the battery pack, the tightness of the battery pack in the wading working condition can be checked in a simulation numerical calculation mode, and the cost is low.
For the convenience of understanding the present embodiment, a method for inspecting a wading seal of a battery pack according to an embodiment of the present invention will be described in detail.
Embodiment one:
in accordance with an embodiment of the present invention, there is provided an embodiment of a method of inspecting a wading seal of a battery pack, it being noted that the steps shown in the flowchart of the figures may be performed in a computer system, such as a set of computer executable instructions, and that, although a logical sequence is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than what is shown herein.
Fig. 1 is a flowchart of a method for inspecting a wading seal of a battery pack according to an embodiment of the present invention, as shown in fig. 1, the method comprising the steps of:
step S102, simulating a process of applying pre-tightening force to an upper cover plate bolt of a battery pack to compress foam by adopting an implicit solver in finite element software, and calculating a first compression rate of the foam under the action of the pre-tightening force;
in the embodiment of the invention, the finite element software may be ABAQUS2018 software, and the implicit solver may be an implicit solver.
Step S104, determining whether the compressed battery pack meets a preset sealing requirement or not based on the first compression rate of foam;
step S106, the compression result is led into a display solver of finite element software, and a fluid-solid coupling method is adopted to simulate the wading working condition of the compressed battery pack at a preset speed;
specifically, the display solver may be an implicit display solver.
Step S108, under the wading working condition, calculating the second compression rate of the foam, and determining whether the compressed battery pack meets the preset sealing requirement or not under the wading working condition based on the second compression rate of the foam.
In an embodiment of the invention, a method for inspecting wading seal of a battery pack is provided, which comprises the following steps: simulating a process of applying a pretightening force to an upper cover plate bolt of a battery pack by adopting an implicit solver in finite element software to compress foam, and calculating a first compression rate of the foam under the action of the pretightening force; determining whether the compressed battery pack meets a preset sealing requirement or not based on the first compression rate of foam; importing the compression result into a display solver of finite element software, and simulating the wading working condition of the compressed battery pack at a preset speed by adopting a fluid-solid coupling method; under wading working conditions, calculating a second compression rate of the foam, and determining whether the compressed battery pack meets preset sealing requirements or not under the wading working conditions based on the second compression rate of the foam. According to the method for testing the wading seal of the battery pack, disclosed by the invention, the tightness test of the battery pack in the wading working condition can be realized in a simulation numerical calculation mode, the cost is low, and the technical problem that the wading seal test of the battery pack cannot be realized at low cost in the prior art is solved.
In an alternative embodiment of the invention, an implicit solver in finite element software is adopted to simulate a process of applying a pretightening force to an upper cover plate bolt of a battery pack to compress foam, and the method specifically comprises the following steps of:
(1) Constructing a finite element model of the battery pack, wherein the finite element model at least comprises: the upper cover plate, the bolts, the lower cover plate and the foam;
(2) And applying a pretightening force to the bolt so as to enable the bolt to be pressed down for a preset distance, and further completing the process of compressing the foam.
Specifically, referring to fig. 2, a schematic diagram of comparison of the foam before and after compression is shown, and the preset distance may be determined according to the requirements of the battery pack design.
In an alternative embodiment of the present invention, the method for calculating the first compression rate of foam under the action of the pretightening force specifically includes the following steps:
(1) Under the action of pretightening force, determining a first deformation amount at the position where foam deformation is minimum;
(2) And calculating the first compression rate of the foam according to the first deformation and the original length of the foam.
Specifically, the first compression ratio of the foam=the first deformation amount/the original length of the foam.
In an alternative embodiment of the present invention, determining whether the compressed battery pack meets a preset sealing requirement based on the first compression rate of the foam specifically includes the following steps:
(1) Judging whether the first compression rate of the foam is within a preset compression range or not;
the predetermined compression range may be 4.1% -30%.
(2) If the first compression rate of the foam is within a preset compression range, determining that the compressed battery pack meets a preset sealing requirement;
specifically, when the first compression rate of the foam is within the interval of 4.1% -30%, the compressed battery pack meets the requirement of preset tightness.
(3) If the first compression rate of the foam is not in the preset compression range, determining that the compressed battery pack does not meet the preset sealing requirement.
In an alternative embodiment of the present invention, a fluid-solid coupling method is adopted to simulate the wading condition of the compressed battery pack at a preset speed, and the method specifically includes the following steps:
(1) Constructing a finite element model of water;
(2) And setting the preset speed of the compressed battery pack to simulate the compressed battery pack to carry out the wading at the preset speed.
Specifically, referring to fig. 3, a schematic diagram of the compressed battery pack under the wading condition is shown, where the preset speed may be a speed set according to needs.
In an alternative embodiment of the present invention, under wading conditions, the second compression rate of the foam is calculated, and specifically includes the following steps:
(1) Under wading working conditions, determining a second deformation quantity at the position with the minimum foam deformation;
(2) And calculating the second compression rate of the foam according to the second deformation and the original length of the foam.
Specifically, the second compressibility of the foam = second deformation/original length of foam.
In an optional embodiment of the present invention, determining whether the compressed battery pack meets a preset sealing requirement under a wading condition based on the second compression rate of the foam specifically includes the following steps:
(1) Judging whether the second compression rate of the foam is within a preset compression range or not;
the predetermined compression range may be 4.1% -30%.
(2) If the second compression rate of the foam is within the preset compression range, determining that the compressed battery pack meets the preset sealing requirement under the wading working condition;
specifically, when the second compression rate of the foam is within the interval of 4.1% -30%, the compressed battery pack meets the requirement of preset tightness under the wading working condition.
(3) If the second compression rate of the foam is not in the preset compression range, determining that the compressed battery pack does not meet the preset sealing requirement under the wading working condition.
According to the method for checking the wading seal of the battery pack, the tightness of the battery pack in the wading working condition can be checked in a simulation numerical calculation mode, and the cost is low.
Embodiment two:
the embodiment of the invention also provides a device for checking the wading seal of the battery pack, which is mainly used for executing the method for checking the wading seal of the battery pack provided in the first embodiment of the invention, and the device for checking the wading seal of the battery pack provided in the embodiment of the invention is specifically introduced.
Fig. 4 is a schematic view of a testing device for wading seal of a battery pack according to an embodiment of the present invention, as shown in fig. 4, the device mainly includes: a pretightening force compression simulation unit 10, a first determination unit 20, a wading simulation unit 30, and a second determination unit 40, wherein:
the pretightening force compression simulation unit is used for simulating the process of applying pretightening force to the upper cover plate bolt of the battery pack to compress the foam by adopting an implicit solver in finite element software, and calculating the first compression rate of the foam under the action of the pretightening force;
the first determining unit is used for determining whether the compressed battery pack meets the preset sealing requirement or not based on the first compression rate of the foam;
the wading simulation unit is used for leading the compression result into a display solver of finite element software, and simulating the wading working condition of the compressed battery pack at a preset speed by adopting a fluid-solid coupling method;
the second determining unit is used for calculating the second compression rate of the foam under the wading working condition and determining whether the compressed battery pack meets the preset sealing requirement under the wading working condition or not based on the second compression rate of the foam.
In an embodiment of the present invention, there is provided a test device for wading seal of a battery pack, including: simulating a process of applying a pretightening force to an upper cover plate bolt of a battery pack by adopting an implicit solver in finite element software to compress foam, and calculating a first compression rate of the foam under the action of the pretightening force; determining whether the compressed battery pack meets a preset sealing requirement or not based on the first compression rate of foam; importing the compression result into a display solver of finite element software, and simulating the wading working condition of the compressed battery pack at a preset speed by adopting a fluid-solid coupling method; under wading working conditions, calculating a second compression rate of the foam, and determining whether the compressed battery pack meets preset sealing requirements or not under the wading working conditions based on the second compression rate of the foam. According to the above description, in the inspection device for wading seal of the battery pack, the tightness inspection of the battery pack in the wading working condition can be realized in a simulation numerical calculation mode, so that the cost is low, and the technical problem that the wading seal inspection of the battery pack cannot be realized at low cost in the prior art is solved.
Optionally, the pretension compression simulation unit is further configured to: constructing a finite element model of the battery pack, wherein the finite element model at least comprises: the upper cover plate, the bolts, the lower cover plate and the foam; and applying a pretightening force to the bolt so as to enable the bolt to be pressed down for a preset distance, and further completing the process of compressing the foam.
Optionally, the pretension compression simulation unit is further configured to: under the action of pretightening force, determining a first deformation amount at the position where foam deformation is minimum; and calculating the first compression rate of the foam according to the first deformation and the original length of the foam.
Optionally, the first determining unit is further configured to: judging whether the first compression rate of the foam is within a preset compression range or not; if the first compression rate of the foam is within a preset compression range, determining that the compressed battery pack meets a preset sealing requirement; if the first compression rate of the foam is not in the preset compression range, determining that the compressed battery pack does not meet the preset sealing requirement.
Optionally, the wading simulation unit is further configured to: constructing a finite element model of water; and setting the preset speed of the compressed battery pack to simulate the compressed battery pack to carry out the wading at the preset speed.
Optionally, the second determining unit is further configured to: under wading working conditions, determining a second deformation quantity at the position with the minimum foam deformation; and calculating the second compression rate of the foam according to the second deformation and the original length of the foam.
Optionally, the second determining unit is further configured to: judging whether the second compression rate of the foam is within a preset compression range or not; if the second compression rate of the foam is within the preset compression range, determining that the compressed battery pack meets the preset sealing requirement under the wading working condition; if the second compression rate of the foam is not in the preset compression range, determining that the compressed battery pack does not meet the preset sealing requirement under the wading working condition.
The device provided by the embodiment of the present invention has the same implementation principle and technical effects as those of the foregoing method embodiment, and for the sake of brevity, reference may be made to the corresponding content in the foregoing method embodiment where the device embodiment is not mentioned.
As shown in fig. 5, an electronic device 600 provided in an embodiment of the present application includes: the battery pack wading inspection method comprises a processor 601, a memory 602 and a bus, wherein the memory 602 stores machine-readable instructions executable by the processor 601, and when the electronic device is running, the processor 601 communicates with the memory 602 through the bus, and the processor 601 executes the machine-readable instructions to execute the steps of the battery pack wading inspection method.
Specifically, the above-mentioned memory 602 and the processor 601 can be general-purpose memories and processors, and are not particularly limited herein, and the above-mentioned inspection method of the battery pack wading seal can be performed when the processor 601 runs a computer program stored in the memory 602.
The processor 601 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in the processor 601 or instructions in the form of software. The processor 601 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), etc.; but may also be a digital signal processor (Digital Signal Processing, DSP for short), application specific integrated circuit (Application Specific Integrated Circuit, ASIC for short), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA for short), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application 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 a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory 602, and the processor 601 reads information in the memory 602 and performs the steps of the above method in combination with its hardware.
Corresponding to the above method for inspecting the battery pack wading seal, the embodiments of the present application also provide a computer-readable storage medium storing machine-executable instructions that, when invoked and executed by a processor, cause the processor to execute the steps of the above method for inspecting the battery pack wading seal.
The inspection device for the wading seal of the battery pack provided by the embodiment of the application can be specific hardware on equipment or software or firmware installed on the equipment. The device provided in the embodiments of the present application has the same implementation principle and technical effects as those of the foregoing method embodiments, and for a brief description, reference may be made to corresponding matters in the foregoing method embodiments where the device embodiment section is not mentioned. It will be clear to those skilled in the art that, for convenience and brevity, the specific operation of the system, apparatus and unit described above may refer to the corresponding process in the above method embodiment, which is not described in detail herein.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
As another example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments provided in the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in 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 computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing an electronic device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the vehicle marking method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
It should be noted that: like reference numerals and letters in the following figures denote like items, and thus once an item is defined in one figure, no further definition or explanation of it is required in the following figures, and furthermore, the terms "first," "second," "third," etc. are used merely to distinguish one description from another and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the foregoing examples are merely specific embodiments of the present application, and are not intended to limit the scope of the present application, but the present application is not limited thereto, and those skilled in the art will appreciate that while the foregoing examples are described in detail, the present application is not limited thereto. Any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or make equivalent substitutions for some of the technical features within the technical scope of the disclosure of the present application; such modifications, changes or substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application. Are intended to be encompassed within the scope of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A method of inspecting a wading seal of a battery pack, comprising:
simulating a process of applying a pretightening force to an upper cover plate bolt of a battery pack by adopting an implicit solver in finite element software to compress foam, and calculating a first compression rate of the foam under the pretightening force;
determining whether the compressed battery pack meets a preset sealing requirement or not based on the first compression rate of the foam;
importing the compression result into a display solver of the finite element software, and simulating the wading working condition of the compressed battery pack at a preset speed by adopting a fluid-solid coupling method;
and under the wading working condition, calculating a second compression rate of foam, and determining whether the compressed battery pack meets the preset sealing requirement or not under the wading working condition based on the second compression rate of the foam.
2. The method of claim 1, wherein simulating the process of compressing foam by applying a pre-load force to the top plate bolts of the battery pack using an implicit solver in finite element software comprises:
constructing a finite element model of a battery pack, wherein the finite element model at least comprises: the upper cover plate, the bolts, the lower cover plate and the foam;
and applying a pretightening force to the bolt so as to enable the bolt to be pressed down for a preset distance, thereby completing the process of compressing the foam.
3. The method of claim 1, wherein calculating a first compression rate of the foam under the preload force comprises:
under the action of the pretightening force, determining a first deformation amount at the position where the foam deformation is minimum;
and calculating the first compression rate of the foam according to the first deformation and the original length of the foam.
4. The method of claim 1, wherein determining whether the compressed battery pack meets a predetermined sealing requirement based on the first compression rate of the foam comprises:
judging whether the first compression rate of the foam is within a preset compression range or not;
if the first compression rate of the foam is within the preset compression range, determining that the compressed battery pack meets the preset sealing requirement;
if the first compression rate of the foam is not within the preset compression range, determining that the compressed battery pack does not meet the preset sealing requirement.
5. The inspection method of claim 1, wherein simulating the wading condition of the compressed battery pack at a predetermined speed using a fluid-solid coupling method comprises:
constructing a finite element model of water;
and setting the preset speed of the compressed battery pack so as to simulate the compressed battery pack to carry out wading at the preset speed.
6. The method of claim 1, wherein calculating a second compression rate of foam during the wading condition comprises:
under the wading working condition, determining a second deformation quantity at the position with the minimum deformation of the foam;
and calculating a second compression rate of the foam according to the second deformation and the original length of the foam.
7. The method of claim 1, wherein determining whether the compressed battery pack meets the preset sealing requirement under wading conditions based on the second compression rate of the foam comprises:
judging whether the second compression rate of the foam is within a preset compression range or not;
if the second compression rate of the foam is within the preset compression range, determining that the compressed battery pack meets the preset sealing requirement under the wading working condition;
if the second compression rate of the foam is not in the preset compression range, determining that the compressed battery pack does not meet the preset sealing requirement under the wading working condition.
8. A device for testing a wading seal of a battery pack, comprising:
the pre-tightening force compression simulation unit is used for simulating a process of applying pre-tightening force to an upper cover plate bolt of the battery pack to compress foam by adopting an implicit solver in finite element software, and calculating a first compression rate of the foam under the action of the pre-tightening force;
the first determining unit is used for determining whether the compressed battery pack meets a preset sealing requirement or not based on the first compression rate of the foam;
the wading simulation unit is used for importing the compression result into a display solver of the finite element software, and simulating the wading working condition of the compressed battery pack at a preset speed by adopting a fluid-solid coupling method;
the second determining unit is used for calculating the second compression rate of the foam under the wading working condition and determining whether the compressed battery pack meets the preset sealing requirement under the wading working condition or not based on the second compression rate of the foam.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method of any of the preceding claims 1 to 7 when the computer program is executed.
10. A computer readable storage medium storing machine executable instructions which, when invoked and executed by a processor, cause the processor to perform the method of any one of the preceding claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310458454.2A CN116467915A (en) | 2023-04-25 | 2023-04-25 | Inspection method and device for wading seal of battery pack and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310458454.2A CN116467915A (en) | 2023-04-25 | 2023-04-25 | Inspection method and device for wading seal of battery pack and electronic equipment |
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| Publication Number | Publication Date |
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| CN116467915A true CN116467915A (en) | 2023-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310458454.2A Pending CN116467915A (en) | 2023-04-25 | 2023-04-25 | Inspection method and device for wading seal of battery pack and electronic equipment |
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| Country | Link |
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| CN (1) | CN116467915A (en) |
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- 2023-04-25 CN CN202310458454.2A patent/CN116467915A/en active Pending
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