CN118999990B - A battery system structure safety protection test method, equipment and medium - Google Patents
A battery system structure safety protection test method, equipment and medium Download PDFInfo
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- 238000009863 impact test Methods 0.000 claims description 4
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- G01M7/00—Vibration-testing of structures; Shock-testing of structures
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Abstract
The application discloses a method, equipment and medium for testing the safety protection of a battery system structure, and relates to the field of battery testing; the method comprises the steps of performing a second scene test to obtain a second test result, performing a third scene test to obtain a third test result, performing a fourth scene test to obtain a fourth test result, performing first, second, third and fourth scene tests on the battery system respectively, wherein the first, second and third directions are respectively an X-axis direction, a Y-axis direction and a Z-axis direction taking the battery system as an origin, the fourth direction is determined according to any two directions of the first, second and third directions, and weighting the four test results to obtain a final test result. The application can obtain more accurate and more realistic battery system protective performance test results.
Description
Technical Field
The present application relates to the field of battery testing, and in particular, to a method, apparatus, and medium for testing the safety protection of a battery system structure.
Background
With the rapid development of new energy technology, the requirements of various fields such as energy storage, automobiles and the like on batteries are more and more strong, and corresponding test systems need to be developed in order to meet the requirements of relevant research and development tests.
In the prior art, a single direction, such as X-direction extrusion and Y-direction extrusion, is mostly adopted for testing the protection performance of the battery system. In a complex real collision scene, the battery system is usually impacted and collided in a plurality of different directions, and even in the collision process in a certain direction, the battery system can be simultaneously subjected to acting forces in a plurality of directions. Therefore, the existing test scheme for the protection performance of the battery system cannot truly reflect the actual bumped scene, and the test result is inaccurate.
Disclosure of Invention
The application aims to provide a battery system structure safety protection testing method, equipment and medium, which can obtain more accurate and more realistic battery system protection performance testing results.
In order to achieve the above object, the present application provides the following.
In a first aspect, the present application provides a method for testing the safety protection of a battery system structure, including:
Executing a first scene test to obtain a first test result, executing a second scene test to obtain a second test result, executing a third scene test to obtain a third test result, and executing a fourth scene test to obtain a fourth test result;
The first scene test, the second scene test, the third scene test and the fourth scene test are respectively used for performing impact in a first direction, a second direction, a third direction and a fourth direction on the battery system; the first direction, the second direction and the third direction are respectively an X-axis direction, a Y-axis direction and a Z-axis direction which take the battery system as an origin, and the fourth direction is determined according to any two directions of the first direction, the second direction and the third direction;
and weighting the first test result, the second test result, the third test result and the fourth test result to obtain a final test result.
In a second aspect, the application provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the computer program to implement the battery system architecture safety protection testing method.
In a third aspect, the present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the battery system architecture safety protection testing method.
According to the specific embodiment of the application, the application discloses the following technical effects that the application provides the battery system structure safety protection testing method, the device and the medium, based on the real automobile field Jing Gongkuang, the collision risk scenes generated by the battery system in the process of driving the new energy automobile on a road from four different impact directions are simulated, and the situation of loss of the battery system is caused, and the four scenes are set for testing, so that the impact test in four different directions is realized, and four testing results are obtained. And then weighting the four obtained test results to obtain a more accurate and more realistic final test result so as to represent the impact resistance of the battery system.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is an application environment diagram of a battery system structure safety protection testing method according to an embodiment of the application.
Fig. 2 is a flow chart of a method for testing the safety protection of a battery system according to an embodiment of the application.
Fig. 3 is a schematic diagram illustrating the relative positions of a test platform, an obstacle, and a battery system according to an embodiment of the application.
Fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
According to the application, 4 different scenes are selected to carry out the dynamic safety test of the protection of the battery system, and each scene can be tested for multiple times, so that the safety performance of the protection of the battery system can be inspected from multiple dimensions. In one example, the test scene comprises a scene of performing structural protection safety test on the battery system from three directions of XYZ and an N-direction composite test working condition scene comprising an X direction and a Z direction. The test of the four scenes can further realize the real safety performance of the battery system in a complex vehicle environment. It is known that structural protection testing of a battery system alone from one direction does not represent its safety capability index against complex impacts on road surfaces.
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description.
The battery system structure safety protection testing method provided by the embodiment of the application can be applied to an application environment shown in fig. 1. Wherein the terminal 102 communicates with the server 104 via a network. The data storage system may store data that the server 104 needs to process. The data storage system may be provided separately, may be integrated on the server 104, or may be placed on a cloud or other server. The terminal 102 can send related instructions of the omnibearing safety protection performance test of the battery system to the server 104, the server 104 sends at least four scene test instructions to corresponding hardware structures after receiving the instructions, then receives corresponding test results, and the obtained four test results are weighted to obtain a final test result. The server 104 may feed back the obtained final test result to the terminal 102.
The terminal 102 may be, but is not limited to, various desktop computers, notebook computers, tablet computers, internet of things devices, and portable wearable devices. The portable wearable device may be a smart watch, smart bracelet, headset, or the like. The server 104 may be implemented as a stand-alone server or a server cluster composed of a plurality of servers, or may be a cloud server.
In an exemplary embodiment, as shown in fig. 2, a method for testing the safety protection of a battery system structure is provided, where the method is executed by a computer device, specifically, may be executed by a computer device such as a terminal or a server, or may be executed by the terminal and the server together, and in an embodiment of the present application, the method is applied to the server 104 in fig. 1, and is described as an example, and includes the following steps 201 to 202.
Step 201, performing a first scenario test to obtain a first test result, performing a second scenario test to obtain a second test result, performing a third scenario test to obtain a third test result, and performing a fourth scenario test to obtain a fourth test result.
The first scene test, the second scene test, the third scene test and the fourth scene test are respectively used for performing impact in a first direction, a second direction, a third direction and a fourth direction on the battery system; the first direction, the second direction and the third direction are respectively an X-axis direction, a Y-axis direction and a Z-axis direction which take the battery system as an origin, and the fourth direction is determined according to any two directions of the first direction, the second direction and the third direction.
In practical application, four test scenarios need to be determined for each battery system to be tested, and multiple tests can be performed for each test scenario. And selecting a fourth direction for multiple tests according to the test scene corresponding to the fourth direction, and then weighting the results obtained by the multiple tests to obtain a final fourth test result.
The first scenario test is as follows.
Firstly, setting relevant data parameters in a scene, wherein the scene comprises an obstacle, the contact end of the obstacle and a battery system (or a battery pack) is a cylindrical top with a diameter of 150mm (+ -1 mm) and a chamfer of R=50 mm (+ -1 mm), and the cylindrical top is made of #45 steel materials. In this scenario, the impact direction of the battery system is the positive X-axis direction. In general, the vehicle travel direction is the X-axis direction, and the other horizontal direction perpendicular to the travel direction is the Y-axis direction.
There are two alternative impact positions, one of which is the point of greatest risk of forward impact of the battery system provided by the manufacturing company, and the other of which is the 1/4 position of the front end of the battery system, depending on the structural arrangement of the battery system. One of them is selected as the impact position of the subsequent impact. Then, the impact speed was set to v=20 km/h (+ -1 km/h). The impact overlap amount is the overlap amount H=20 mm (-0 mm/+6 mm) of the highest point of the top of the barrier and the lowest point of the bottom of the battery system along the Z direction under the whole vehicle mass balance weight.
Finally, after the impact is completed according to the conditions, observing for 2 hours at the test environment temperature, and then obtaining a corresponding first test result.
The second scenario is tested as follows.
Firstly, setting relevant data parameters in a scene, namely, not setting an obstacle in the scene, and adopting an impact head instead. The impact head is made of steel, and the contact end of the impact head and the battery system is in a semi-cylindrical shape with the diameter of 130 mm. In this scenario, the impact direction of the battery system is the Y-axis positive direction.
One of the two alternative impact positions that have been described in the first scenario test above is selected as the impact position for the subsequent impact. Then, the impact speed was set to 15km/h and the impact mass to 2000kg.
Finally, after the impact is completed according to the conditions, observing for 2 hours at the test environment temperature, and then obtaining a corresponding second test result.
The third scenario is tested as follows.
Firstly, setting relevant data parameters in a scene, namely, setting no obstacle in the scene and adopting an impact head. The impact head is made of steel, and the contact end of the impact head and the battery system is hemispherical with the diameter of 30 mm. In this scenario, the impact direction of the battery system is the positive Z-axis direction.
The bottom protection risk point of the battery system at 3 is selected as the impact position (covering the front, middle and rear of the battery) according to the structural arrangement of the battery system. The impact energy was then set to 150J.
Finally, after the impact is completed according to the conditions, observing for 2 hours at the test environment temperature, and then obtaining a corresponding third test result. In addition, when impact testing is performed on the battery system, the body structure that protects the battery pack or system is allowed to participate in the test.
The fourth scenario test is as follows.
The method comprises the steps of determining a fourth direction, determining a scene test component based on the fourth direction, and performing fourth-direction impact test on the battery system based on the scene test component to obtain a fourth test result. Specifically, the fourth scene test is a composite impact scene, wherein the fourth direction is obtained by vector superposition according to any two of the first direction, the second direction and the third direction. In practical applications, the first direction and the second direction are generally selected for determination.
The scene test assembly comprises a test platform and an obstacle, wherein the obstacle is arranged on the test platform, the arrangement angle and the surface shape of the obstacle correspond to the fourth direction, so that when the battery system moves to the position where the obstacle is located, the battery system and the obstacle are overlapped, and the test platform is provided with a gradient which is used for simulating a pothole on a road. The gradient of the test platform ranges from 0 degrees to 5 degrees. Fig. 3 is a schematic diagram showing the relative positions of the test platform, the obstacle and the battery system.
In another practical application, the test platform comprises an ascending road section, a straight road section and a descending road section which are sequentially arranged. Whereas the position of the obstacle shown in fig. 3 above is on the downhill path.
In one practical test, the contact end of the barrier with the battery system was a spherical top with r=75 mm (+ -1 mm) and was made of #45 steel material. The height of the obstacle is such that a certain amount of overlap occurs between the top end thereof and the bottom end of the battery pack in a direction perpendicular to the ground. The impact direction still selects the positive direction of the X axis, and because the test platform has a gradient, even if the impact is carried out according to the positive direction of the X axis, the impact angle of the battery system cannot be affected, and the obstacle is impacted at the weakest position of the battery pack by adjusting the relative positions of the preset obstacle and the running platform such as the step.
There are two alternative impact positions, one of which is the point of greatest risk of forward impact of the battery system provided by the manufacturing company, and the other of which is the 1/4 position of the front end of the battery system, depending on the structural arrangement of the battery system. One of them is selected as the impact position of the subsequent impact. Then, the impact speed was set to v=20 km/h (+ -1 km/h). The impact overlap amount is the overlap amount H=20 mm (-0 mm/+6 mm) of the highest point of the top of the barrier and the lowest point of the bottom of the battery system along the Z direction under the whole vehicle mass balance weight.
According to the above conditions, the vehicle body structure including the battery system is caused to travel down from a platform such as a curb right-angle step of a certain height at a set speed, and the battery system is caused to collide with an obstacle, so that the impact is completed. Then, the test is carried out for 2 hours at the test environment temperature, and then a corresponding fourth test result is obtained.
Step 202, weighting the first test result, the second test result, the third test result and the fourth test result to obtain a final test result.
In one application example, the first test result, the second test result, the third test result, and the fourth test result each include three levels.
The first grade is represented by A=100, and the first grade represents that after the battery system is impacted, the insulativity of the battery system meets a first preset condition, and the air tightness of the battery system meets a second preset condition. And the second level is represented by B=80, and the second level represents that the insulativity of the battery system does not meet the first preset condition or the air tightness of the battery system does not meet the second preset condition after the battery system is impacted. And the third grade is represented by C=60, and the third grade represents that the insulativity of the battery system does not meet the first preset condition and the air tightness of the battery system does not meet the second preset condition after the battery system is impacted.
In order to fit the practical situation, the application sets the preset conditions that the insulation strength of the battery system is not lower than a preset insulation strength value, the preset insulation strength value ranges from 100 omega/V to 500 omega/V, the second preset condition that the gas leakage amount of the battery system is smaller than a preset leakage value, and the preset leakage value ranges from 0Pa/min to 100Pa/min. In different tests, the preset conditions can be adaptively changed.
In another application example, step 202 specifically includes the following four steps.
(1) And acquiring a historical damaged battery system data set within a preset duration. In practical application, the model of the battery system in the obtained historical damaged battery system dataset is consistent with the model of the battery system to be detected, and the conventional determination mode is determined according to the production company.
(2) And determining the number of the damaged battery systems in the first direction, the number of the damaged battery systems in the second direction, the number of the damaged battery systems in the third direction and the number of the damaged battery systems in the fourth direction according to the historical damaged battery system data set.
(3) Determining a first direction weight coefficient, a second direction weight coefficient, a third direction weight coefficient, and a fourth direction weight coefficient based on the first direction damaged battery system number, the second direction damaged battery system number, the third direction damaged battery system number, and the fourth direction damaged battery system number. Specifically, the corresponding weight coefficient may be determined according to the ratio of the number of damaged battery systems in different directions.
In addition, generally, the weight coefficients corresponding to different production companies or different preset durations are different.
(4) And weighting calculation is carried out on the first test result, the second test result, the third test result and the fourth test result based on the first direction weight coefficient, the second direction weight coefficient, the third direction weight coefficient and the fourth direction weight coefficient so as to obtain a final test result.
In a specific application example, as shown in the following table 1, the first scene test is performed by the item X, the second scene test is performed by the item Y, the third scene test is performed by the item Z, and the fourth scene test is performed by the item N, wherein the weight coefficients determined based on the above steps (1) - (3) are respectively 60% for the first direction weight coefficient, 30% for the second direction weight coefficient, 7% for the third direction weight coefficient, and 3% for the fourth direction weight coefficient, and the final test result is calculated by using the weighting formula s=s1×k1+s2×k2+s3×k3+s4×k4.
TABLE 1
It is known that the four direction weight coefficients K1, K2, K3, K4 fully consider the probability and difficulty of the collision of the whole vehicle in the actual collision process. Finally, threshold matching can be performed according to the final test result obtained in table 1, so as to obtain the corresponding performance advantages of the battery system.
In conclusion, the application provides a feasible scheme for dynamic safety evaluation of the bottom of the power battery pack of the electric automobile, and has positive promotion effect on promoting green and healthy development of new energy.
In an exemplary embodiment, a computer device, which may be a server or a terminal, is provided, and an internal structure thereof may be as shown in fig. 4. The computer device includes a processor, a memory, an Input/Output interface (I/O) and a communication interface. The processor, the memory and the input/output interface are connected through a system bus, and the communication interface is connected to the system bus through the input/output interface. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input/output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used for communicating with an external terminal through a network connection. The computer program when executed by a processor implements a battery system architecture safety protection testing method.
It will be appreciated by persons skilled in the art that the architecture shown in fig. 4 is merely a block diagram of some of the architecture relevant to the present inventive arrangements and is not limiting as to the computer device to which the present inventive arrangements are applicable, and that a particular computer device may include more or fewer components than shown, or may combine some of the components, or have a different arrangement of components. In an exemplary embodiment, a computer device is provided, comprising a memory and a processor, the memory having stored therein a computer program, the processor performing the steps of the method embodiments described above when the computer program is executed.
In an exemplary embodiment, a computer-readable storage medium is provided, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method embodiments described above.
It should be noted that, the user information (including but not limited to user equipment information, user personal information, etc.) and the data (including but not limited to data for analysis, stored data, presented data, etc.) related to the present application are both information and data authorized by the user or sufficiently authorized by each party, and the collection, use and processing of the related data are required to meet the related regulations.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magneto-resistive random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (PHASE CHANGE Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in various forms such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic RandomAccess Memory, DRAM), etc.
The databases referred to in the embodiments provided herein may include at least one of a relational database and a non-relational database. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processor referred to in the embodiments provided in the present application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, or the like, but is not limited thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The principles and embodiments of the present application have been described herein with reference to specific examples, which are intended to facilitate an understanding of the principles and concepts of the application and are to be varied in scope and detail by persons of ordinary skill in the art based on the teachings herein. In view of the foregoing, this description should not be construed as limiting the application.
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| CN113551925A (en) * | 2021-08-18 | 2021-10-26 | 中国第一汽车股份有限公司 | Power battery assembly bottom collision test device and test method |
| CN117367731A (en) * | 2023-09-16 | 2024-01-09 | 重庆师范大学 | Electric automobile battery package collision evaluation system |
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| KR102205317B1 (en) * | 2016-11-30 | 2021-01-20 | 주식회사 엘지화학 | Apparatus for Testing Safety of Battery Pack Against Impact |
| CN109910679B (en) * | 2019-04-23 | 2021-11-05 | 南京维思科汽车科技有限公司 | A battery pack collision intensity monitoring device |
| CN113588194A (en) * | 2021-07-26 | 2021-11-02 | 合肥国轩高科动力能源有限公司 | Battery cell module impact test device |
| CN116718340A (en) * | 2023-08-10 | 2023-09-08 | 中国汽车技术研究中心有限公司 | Battery pack bottom impact test system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113551925A (en) * | 2021-08-18 | 2021-10-26 | 中国第一汽车股份有限公司 | Power battery assembly bottom collision test device and test method |
| CN117367731A (en) * | 2023-09-16 | 2024-01-09 | 重庆师范大学 | Electric automobile battery package collision evaluation system |
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