Leak testing device and method for battery case

A battery case and leak detection technology, which is used in liquid/vacuum measurement for liquid tightness, and by measuring the acceleration and deceleration rate of fluid, etc. Simple, short leak detection time, and the effect of ensuring the pass rate
CN102297752AInactive Publication Date: 2011-12-28CHERY AUTOMOBILE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHERY AUTOMOBILE CO LTD
Publication Date
2011-12-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a leak detection device and a leakage detection method for a battery shell, belonging to the field of power battery development. The leak detection equipment includes a plugging head and a vacuum system, the liquid injection port of the battery to be tested is connected to the plugging head, the vacuum system includes a pipeline, the plugging head is connected to the pipeline, the There is a vacuum pressure gauge on the pipeline. The present invention improves the sensitivity of battery casing leak detection by using a vacuum pressure gauge to test pressure changes, so that small leaks can also be detected, ensuring the pass rate of the battery casing, and at the same time has the advantages of simple operation and easy observation of detection results , Leak detection time is short and so on.
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Description

technical field

[0001] The invention relates to the field of power battery development, in particular to a leak detection device for detecting leakage points after welding of battery shells. Background technique

[0002] In today's rapidly developing society, traditional energy sources such as oil, coal, and natural gas are decreasing as people increasingly exploit them. Clean, efficient, and large-capacity batteries such as lithium-ion batteries and fuel cells have become an effective way to solve environmental and energy problems faced by modern civilization. , and has been widely used in notebook computers, camcorders, digital cameras, mobile phones and power tools and other products.

[0003] Large-capacity battery casings are mostly made of steel and closed by welding. Under harsh conditions such as extremely low temperature, thin air pressure, and high-power discharge power drive, the sealing performance of the large-capacity battery case is very high, so the battery ...

Claims

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