Method for detecting leakage of lithium ion battery

A lithium-ion battery and detection method technology, applied in the direction of liquid tightness measurement, measuring device, instrument, etc. using liquid/vacuum degree, can solve problems such as leakage of electrolyte, loss of charge and discharge function, etc., to improve effectiveness, Easy operation and high detection accuracy

Inactive Publication Date: 2011-05-18
TIANJIN LISHEN BATTERY
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

If the adhesive layer of the aluminum-plastic packaging film is poorly bonded and the internal and external environments are connected, the electrolyte inside the battery will leak (leakage), and air will enter the battery to cause the battery to bulge and lose the charge and discharge function.

Method used

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  • Method for detecting leakage of lithium ion battery

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Experimental program
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Embodiment Construction

[0020] Referring to the accompanying drawings, a lithium-ion battery leakage detection device of the present invention includes a casing 4 for containing the lithium-ion battery to be tested, the top of the casing 1 has an air outlet, and the air outlet is covered with an inverted funnel 3, The detection head 2 of the organic compound component detector 1 is placed at the opening on the top of the funnel 3 , and the detector 1 is fixed on the outer wall of the box body 1 through a bracket 5 .

[0021] The box 1 can realize the heating of the battery and promote the volatilization of the electrolyte; the volatile components of the electrolyte diffuse to the detection head of the tester through the gas collection device, causing the response of the tester to make a judgment on whether there is battery leakage .

[0022] In the test environment, record the environmental organic component content detected by the display instrument at continuous intervals of 1 minute, calculate the...

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Abstract

The invention discloses a method for detecting leakage of a lithium ion battery, comprising the following steps: a) placing a lithium ion battery to be detected into a space the top of which is provided with an air outlet; b) heating the lithium ion battery to be detected; c) collecting gas at the air outlet; d) detecting the content of organic compound component in the collected gas; and e) determining whether the leakage of the lithium ion battery is existed or not by comparing the content of the organic compound component with a threshold. In the invention, variation of the external environment caused by the leakage of the lithium ion battery is detected, and inspection on the sealing effect of the lithium ion battery is realized, thus avoiding loss of leakage and ballooning safety potential caused by poor sealing property of the battery to a customer.

Description

technical field [0001] The invention relates to a detection method for the sealing effect of a lithium ion battery, in particular to a detection method for evaluating the sealing effect of the lithium ion battery by detecting gas leaked inside the battery. Background technique [0002] Polymer flexible packaging lithium-ion batteries have the advantages of high voltage, high specific energy, many cycle times, and long storage time. They are not only widely used in portable electronic devices such as mobile phones, digital cameras and laptop computers, but also widely used in electric vehicles. Large and medium-sized electric equipment such as automobiles, electric bicycles, and electric tools. [0003] Compared with square and circular lithium-ion batteries, polymer soft-pack lithium-ion batteries have better appearance flexibility, so they are more used in various electronic devices that pursue beauty and fashion. The internal working environment of the lithium-ion battery...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/02G01N33/00
Inventor 李梁张政涛贾学恒
Owner TIANJIN LISHEN BATTERY
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