Battery module testing device and testing method

A test device and battery module technology, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the problems of long test cycle, difficult processing, high cost, etc., and achieve simple and convenient simulation method and short test time , the effect of force balance

Pending Publication Date: 2022-07-29
WANXIANG 123 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing battery expansion force and displacement measurement device is complex, time-consuming, and has no guiding significance for the initial design of the battery module. There are still the following problems:
[0005] 1. Hydraulic device measurement, the measurement device is complicated, the processing is difficult and costly, and the test process is cumbersome;
[0006] 2. Elastic device measurement, the measurement device is complex, the processing is difficult and costly, and the test process is cumbersome;
[0007] 3. The online test of battery charge and discharge cycle for a long time, the test cycle is long, it is difficult to obtain effective data in a short time

Method used

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  • Battery module testing device and testing method
  • Battery module testing device and testing method
  • Battery module testing device and testing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] like Figures 1 to 7 As shown, a battery module testing device includes:

[0041] Module housing 1; the module housing 1 is provided with two parallel expansion simulation structures, there is a gap between the two expansion simulation structures, and there is also a gap between the expansion simulation structure and the inner wall of the housing , the gap is used to place the electric core; the two sides of the module housing 1 are symmetrically provided with a plurality of pull rings 4, and the pull rings 4 are connected to the expansion simulation structure;

[0042] The pull rod 5 is connected with the pull ring 4 .

[0043] In the present invention, the battery cells placed in the module housing 1 are tested through the expansion simulation structure and the pull ring 4 connected to the expansion simulation structure, and a better simulation can be achieved only by applying a pulling force to the pull ring 4. In the state of battery expansion, the simulation meth...

Embodiment 2

[0064] like Figures 1 to 7 As shown, a test method, the test steps are as follows:

[0065] Step S1: Assemble the module shell 1, the fixing plate 31, the expansion simulation plate 32, the pull ring 4, the pull rod 5 and the gasket 6 in a fixed assembly sequence, and place the unfilled cells in the assembly process. in the gap;

[0066] Step S2: fixing the assembled test device to the test bench;

[0067] Step S3: connecting the third connecting parts 53 of the two pull rods 5 to the tension machine, and adjusting the position of the tension machine so that the pull rods 5 are in a horizontal but unstressed state;

[0068] Step S4: start the tensile machine, apply a tensile force to the test device at a set speed, and simulate the process of battery expansion;

[0069] The set speed is 0.1~0.5mm / s. Using this speed can better simulate the process of cell expansion, and can better reflect the relationship between expansion force and displacement.

[0070] Step S5: record ...

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Abstract

The invention discloses a battery module testing device and a testing method. The battery module testing device comprises a module shell; two parallel expansion simulation structures are arranged in the module shell, a gap exists between the two expansion simulation structures, a gap also exists between the expansion simulation structures and the inner wall of the shell, and the gap is used for placing a battery cell; a plurality of pull rings are symmetrically arranged on the two sides of the module shell, and the pull rings are connected to the expansion simulation structure; the pull rod is connected with the pull ring; the battery cell placed in the module shell is tested through the expansion simulation structure and the pull ring connected with the expansion simulation structure, the expansion state of the battery can be well simulated only by applying pulling force to the pull ring, the simulation method is simple and convenient, and the test time is short; and the pull rings are simultaneously pulled through the pull rods, so that the stress balance of each position of the battery module is ensured, and the relationship between the expansive force and the displacement can be more accurately measured.

Description

technical field [0001] The invention relates to the technical field of battery testing, in particular to a battery module testing device and a testing method. Background technique [0002] As a mobile power source, batteries are widely used in our production and life. In the process of battery use, the expansion force and displacement must be accompanied, and it has a huge impact on the capacity and life of the battery. [0003] During the charging and discharging cycle of the soft-packed lithium-ion battery, the thickness of the battery cell will increase and the volume will expand due to the following two reasons: first, the bulge caused by the change in the thickness of the battery pole piece; second, due to the oxidation and decomposition of the electrolyte. Bloating caused by gas. The cell expansion will have an extremely significant impact on its own cycle life and the structural reliability of the battery module. Therefore, it is very important to study the thickne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08
CPCG01N3/08G01N2203/0003G01N2203/0017G01N2203/0075G01N2203/0605G01N2203/0676G01N2203/0682
Inventor 姚京杨素丽
Owner WANXIANG 123 CO LTD
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