Accurate detecting method for cavity leakage of lithium-ion battery and device thereof

A lithium-ion battery and battery cavity technology, which is used in measuring devices, using liquid/vacuum for liquid tightness measurement, and measuring the acceleration and deceleration rate of fluids, etc. Detection and other problems, to achieve the effect of improving detection accuracy, simple structure, and improving detection accuracy

Inactive Publication Date: 2007-09-12
TIANJIN LISHEN BATTERY
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Problems solved by technology

[0003] At present, the detection methods used in the production of enterprises are relatively primitive, basically using the liquid "bubbling" method, and some using some simple tooling and ordinary pressure

Method used

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  • Accurate detecting method for cavity leakage of lithium-ion battery and device thereof
  • Accurate detecting method for cavity leakage of lithium-ion battery and device thereof
  • Accurate detecting method for cavity leakage of lithium-ion battery and device thereof

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing and preferred embodiment, the specific embodiment, structure, feature of the method of the present invention and device thereof are described in detail as follows:

[0020] A precise detection method for lithium-ion battery cavity leakage, characterized in that the implementation steps are as follows:

[0021] (1) In the vacuuming stage, the time is controlled within T1: within 3 to 5 seconds, and the vacuum degree inside the battery cavity is pumped to a certain value P1; if the vacuum degree is within T1 time, the value of P1 cannot be reached , it means that the battery cavity has obvious leakage, which is judged as bad, where P1 is the set standard value: -75KPa~-95KPa;

[0022] (2) In the stage of maintaining balance, the time is controlled within T2: within 2-3 seconds, the seal of the battery cavity is kept, the vacuum degree is maintained, the gas path is stabilized, and interference is eliminated;

[0023] (3) In ...

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Abstract

This invention relates to a kind of precision test method of lithium ionizaation cell cavity leak and its device. The steps as follows: (1) vacuumize phase, time control at T1:3 to 5 second within, flip the inner vacuum of cell cavity to a certainty value P1;if vacuum degree within T1 can not achieve P1 value, it illustrate battery cavity has obvious leak, judge for badness; (2) keep balance phase: time control at T2:2 to 3 second within, keep cell cavity sealing, keep its vacuum level, stabilize gas path, suppress interference;(3) detection phase: clean display of initiating electron vacuum gauge, time control at T3:1 to 4 second within, detect cell cavity inner vacuum degree's variance delta P, if delta P greater than set value, then cell cavity has micro leak, judge for badness;(4) complete phase, time control at T4:0.2 to 0.5 second, restore cell cavity to normality. This device can proceed automatic discrimination to badness cell, advance detect precision and/or efficiency.

Description

technical field [0001] The invention relates to a lithium ion battery leakage detection method and a device thereof, in particular to a precise detection method and a device thereof for lithium ion battery cavity leakage. Background technique [0002] Japan's Sony Corporation and Sanyo Corporation began research on the practical application of lithium-ion secondary batteries in 1985 and 1988, respectively. All countries in the world have studied the application performance of lithium-ion secondary batteries in the field of communications, portable electronic products, electric vehicles, and aerospace. Great attention has been paid, and the performance of lithium-ion secondary batteries, especially the manufacturing process, has been continuously explored and improved. After the rapid development of lithium-ion batteries in recent years, its main development tends to be stable; such as the sealing of the square battery case and the cover, the early purely mechanical riveting ...

Claims

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Application Information

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IPC IPC(8): G01M3/26G01R31/36
Inventor 吉跃华刘志盛张明昆赵建尚利辉薛龙均
Owner TIANJIN LISHEN BATTERY
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