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A leak detection device before lithium battery injection

A lithium battery liquid injection and leak detection technology, which is applied in the field of lithium ion batteries, can solve the problems of low detection sensitivity, influence of subsequent processes, and long detection time, and achieve the effects of high detection sensitivity, improved efficiency, and short detection time

Active Publication Date: 2021-01-29
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

This method mainly has the following defects: 1. A certain pressure is charged inside the battery during detection, which will cause the battery to bulge, which will affect the subsequent process; 2. The detection sensitivity is not high, which directly causes the detection time to be too long and the efficiency is low

Method used

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  • A leak detection device before lithium battery injection

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Embodiment Construction

[0019] refer to figure 1 , a leak detection device before liquid injection of a lithium battery proposed in this disclosure, including: a cavity 10, a battery positioning assembly 20, a leak detection cylinder assembly, a sealed cylinder assembly, a helium source 601, a helium hose 603, a compressed air Source 701, helium detector 80 and vacuum pump 901.

[0020] The sealing cylinder assembly includes: a sealing cylinder 501 , a sealing guide rod 502 , a sealing push plate 503 and a sealing cover 504 . The sealing push plate 503 is installed on the sealing cylinder 501 through the sealing guide rod 502, and the sealing cylinder 501 is used to drive the sealing push plate 503 to move up and down. The seal cover 504 is installed on the side of the seal push plate 503 away from the seal cylinder 501 and moves up and down following the seal push plate 503 . When the sealing cover 504 is moved down, it cooperates with the cavity 10 to form a sealed cavity, which provides a sealed...

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Abstract

The disclosure proposes a leak detection device before liquid injection of a lithium battery, including: a cavity, a battery positioning assembly, a leak detection cylinder assembly, a sealed cylinder assembly, a helium source, a helium hose, a compressed air source, and a helium detection instrument and vacuum pump. The disclosure proposes a leak detection device for a lithium battery before liquid injection, which forms an openable sealed negative pressure environment through the cavity and the sealing cover, so that a small amount of helium gas is injected into the battery under the negative pressure environment, and passes through the detection cavity. The helium composition of the battery can be used to judge whether the battery is leaking.

Description

technical field [0001] The disclosure relates to the technical field of lithium-ion batteries, in particular to a leak detection device before liquid injection of the lithium battery. Background technique [0002] After the lithium-ion battery is assembled and the cover plate is welded, it needs to be tested for air tightness before the electrolyte is injected to ensure the sealing qualification of the lithium-ion battery. [0003] At present, the differential pressure airtight detection method is often used: a certain amount of pure nitrogen is charged inside the battery and the pressure is maintained, and then the gas leakage of the battery is detected by a differential pressure airtight leak detector. This method mainly has the following defects: 1. A certain pressure is charged inside the battery during detection, which will cause the battery to bulge, which will have an impact on the subsequent process; 2. The detection sensitivity is not high, which directly causes the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/22
CPCG01M3/226
Inventor 高冲王晨旭
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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