Airtightness detection method of soft package lithium battery

A soft-pack lithium battery and airtight detection technology, which is applied in the direction of detecting the appearance of fluid at the leakage point and using liquid/vacuum degree for liquid tightness measurement, etc., can solve the problems of low detection accuracy and easy misjudgment

Active Publication Date: 2021-03-30
HUNAN HONGYI TECH CO LTD
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Problems solved by technology

[0005] Based on this, it is necessary to provide an airtight detection method for soft-pack lithium batteries with high detection accuracy i

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  • Airtightness detection method of soft package lithium battery
  • Airtightness detection method of soft package lithium battery

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[0029] In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed it...

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Abstract

The invention relates to an airtightness detection method of a soft package lithium battery. The airtightness detection method of the soft package lithium battery comprises the following steps: putting a battery cell into a battery cell area, and putting an air bag into an air bag area; packaging a top sealing region, a side sealing region and a first sealing region; puncturing the air bag area, and pumping out air in the air bag area; extruding the air bag to break the air bag so as to release the detected gas; guidingthe detected gas released by the air bag to the battery cell area; packaging a secondary packaging area; and detecting whether the detected gas escapes from the soft package lithium battery or not. According to the airtightness detection method for the soft package lithium battery provided by the invention, the airbag internally containing the detected gas is placed in the airbag area of the aluminum-plastic shell, the airbag is crushed after the airbag area is subjectedto air exhaust, the detected gas is guided to the battery cell area, and then the secondary sealing area is packaged to obtain the soft package lithium battery, so that airtightness detection is carried out on the soft package lithium battery; the result of the packaging effect of the soft package lithium battery can be directly obtained, the detection precision is high, and the missed judgment phenomenon is avoided.

Description

technical field [0001] The invention relates to the technical field of battery airtightness detection, in particular to an airtightness detection method for a soft-pack lithium battery. Background technique [0002] Soft pack lithium battery is a common lithium battery, which has the advantages of good safety performance, light weight, large capacity, small internal resistance, and flexible shape design. [0003] The internal chemical system of lithium batteries is active, and it is very easy to have side reactions with external moisture and air, resulting in battery performance degradation or failure. Therefore, the airtightness of packaging is crucial to the reliability and safety of lithium batteries. How to effectively detect the airtightness of soft-pack lithium batteries and ensure that defective packaging products will not flow into the consumer market is of great significance. [0004] However, the existing leak detection methods for soft-pack lithium batteries cann...

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Application Information

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IPC IPC(8): G01M3/20
CPCG01M3/20
Inventor 胡忠汉
Owner HUNAN HONGYI TECH CO LTD
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