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Testing method and device for performance of hot melt adhesive layer of lithium ion battery and lithium ion battery

A lithium-ion battery and hot-melt adhesive layer technology, applied in the direction of measuring devices, mechanical devices, instruments, etc., can solve the problems of strong subjectivity and the inability to provide effective data for hot-melt adhesive layer design, and achieve low execution difficulty, The effect of large industrial application value and high data reliability

Active Publication Date: 2021-04-30
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the evaluation of the hot melt adhesive layer bonding effect often uses manual peeling of the hot melt adhesive layer, and judges according to the performance of the hot melt adhesive layer during peeling Due to the strong subjectivity of the bonding effect of the hot-melt adhesive layer, it is often impossible to provide effective data for the design of the hot-melt adhesive layer during battery design

Method used

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  • Testing method and device for performance of hot melt adhesive layer of lithium ion battery and lithium ion battery
  • Testing method and device for performance of hot melt adhesive layer of lithium ion battery and lithium ion battery
  • Testing method and device for performance of hot melt adhesive layer of lithium ion battery and lithium ion battery

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Experimental program
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Effect test

Embodiment 1

[0168] The actual shear force F1 of obtaining the lithium-ion battery hot melt adhesive layer of the present embodiment specifically includes the following steps:

[0169] 1. Prepare 3 lithium-ion battery samples of type A and make them into actual shear force test samples of the hot-melt adhesive layer of lithium-ion batteries;

[0170] Among them, the cell mass of type A lithium-ion battery is 0.082kg, and the area S1 of the hot melt adhesive layer is 720mm 2 , the first inner surface of the lithium-ion battery packaging layer is connected to the first surface of the battery cell through a hot melt adhesive layer, and the first outer surface is opposite to the first inner surface;

[0171] 2. Use the upper clamp of the tensile machine to clamp the clamping end of the packaging layer of the actual shear force test sample of the hot melt adhesive layer of the lithium-ion battery to be tested, and the lower clamp to clamp the clamping end of the battery cell;

[0172] 3. Set t...

Embodiment 2

[0179] The operation steps for obtaining F1 in this embodiment 2 are basically the same as the operation steps for obtaining F1 in embodiment 1. The only difference is that in this embodiment 2, a type B lithium-ion battery is used, the battery cell mass is 0.075kg, and the hot melt adhesive layer Area S1 is 900mm 2 , measured F1 = 108.5N;

[0180] The operation steps of obtaining F2 in the second embodiment are the same as those in the first embodiment, and the measured F2=82.08N.

Embodiment 3

[0182] The operation steps of this embodiment 3 are basically the same as that of embodiment 1, the only difference is that in this embodiment 3 a type C lithium-ion battery is used, the mass of the battery cell is 0.065kg, and the area S1 of the hot melt adhesive layer is 840mm 2 , measured F1 = 67.7N;

[0183] The operation steps for obtaining F2 in Embodiment 3 are consistent with the operation steps for obtaining F2 in Embodiment 1, and it is measured that F2=71.14N.

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Abstract

The invention provides a testing method and device for the performance of a hot melt adhesive layer of a lithium ion battery and the lithium ion battery. The testing method provided by the invention comprises the following steps: acquiring an actual shearing force F1 of the hot melt adhesive layer of the lithium ion battery; acquiring a drop shear force F2 of the hot melt adhesive layer of the lithium ion battery; when F1 is greater than F2, judging that the bonding performance of the hot melt adhesive layer of the lithium ion battery is qualified; and when F1 is less than or equal to F2, judging that the bonding performance of the hot melt adhesive layer of the lithium ion battery is unqualified. According to the method, the F1 and the F2 are obtained, and whether the bonding performance of the hot melt adhesive layer of the lithium ion battery is qualified or not is judged according to the size relationship between the F1 and the F2, so that the influence of subjective factors during evaluation of the performance of the hot melt adhesive layer is reduced; the performance of the hot melt adhesive layer of the lithium ion battery is scientifically and reasonably evaluated, so that the design of the hot melt adhesive layer of the lithium ion battery can be guided. The lithium ion battery F1 is greater than F2, so that the lithium ion battery has good safety performance.

Description

technical field [0001] The invention relates to a test method and device for the performance of a lithium-ion battery hot-melt adhesive layer and a lithium-ion battery, belonging to the field of lithium-ion batteries. Background technique [0002] Lithium-ion batteries have become an indispensable part of our lives. Lithium-ion batteries are indispensable for mobile phones, notebook computers, digital cameras, etc. that people use in daily life. With the development of science and technology, the demand for lithium-ion batteries in all walks of life is increasing, and the requirements for the safety performance of lithium-ion batteries are also getting higher and higher. [0003] The battery cell is one of the core components of the lithium-ion battery. When the battery cell falls, there is a dislocation of the internal pole piece of the battery cell, which may cause a serious short circuit or even an explosion risk. Therefore, it is often necessary to use a hot melt adhesiv...

Claims

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Application Information

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IPC IPC(8): G01N19/04
CPCG01N19/04Y02E60/10
Inventor 郭飞全小林邹浒
Owner ZHUHAI COSMX BATTERY CO LTD
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