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Leakage detection device and leakage detection method for lithium ion battery

A lithium-ion battery and battery technology, applied in the direction of detecting the appearance of fluid at the leakage point, using liquid/vacuum degree for liquid tightness measurement, etc., can solve the problems of laser instability, explosion, effective screening, etc., and achieve reduction Detect the risk of missed judgment, improve the detection efficiency, and improve the effect of screening rate

Pending Publication Date: 2021-08-06
湖南领湃科技股份有限公司 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Usually, during the laser welding process, a weld seam will be formed between the cell cover plate and the shell. Due to factors such as laser instability, cover plate impurities, aluminum shell impurities, butt gap deviation, etc., leaks may occur at the weld joint The phenomenon
The formed leaks are usually on the micron scale, and micron-scale small leaks cannot be effectively screened by humans or inspection instruments during the manufacturing process. If they are assembled into the car, electrolyte leakage may occur, resulting in risk of fire or explosion

Method used

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  • Leakage detection device and leakage detection method for lithium ion battery
  • Leakage detection device and leakage detection method for lithium ion battery
  • Leakage detection device and leakage detection method for lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Please refer to figure 1 As shown, the leak detection device for a lithium ion battery includes a loading tray structure 100 on which a battery 300 is loaded, and the loading tray structure 100 is detachably mounted on a test platform 200 .

[0049] Such as image 3As shown, the test platform 200 is provided with a test hole corresponding to the battery, and a test paper 400 is provided in the test hole. The loading tray structure 100 loaded with the battery 300 is installed forward or turned over and installed on the test platform 200, so that the battery 300 is turned upside down and in contact with the test paper 400 and closely adhered to it. The test paper 400 detects whether the welding seam of the battery 300 has leakage holes Leakage of electrolyte.

[0050] In one embodiment of the present invention, as image 3 As shown, the loading tray structure 100 includes a loading tray 1 , and a clamping assembly is provided on the loading tray 1 , and the clamping as...

Embodiment 2

[0060] This specific embodiment provides a leak detection method for a lithium-ion battery. By using the leak detection device in Example 1, the lithium-ion battery is installed upside down on the loading tray structure 100, and then the loading tray structure 100 is installed forward on the test The detection on the platform 200 specifically includes the following steps:

[0061] S1. Install several batteries 300 upside down on the loading tray structure 100 in sequence.

[0062] Specifically:

[0063] Firstly, turn several batteries 300 upside down in turn by the manipulator, so that the poles of the batteries 300 are placed downwards at the loading and buffering station;

[0064] Secondly, the inverted battery 300 is sequentially grasped by the manipulator and placed in the clamping area formed by the adjacent clamping blocks 5;

[0065] Again, the inserting block 3 is clamped by the manipulator and installed on the loading tray 1, so that the clamping block 5 clamps the ...

Embodiment 3

[0076] This specific embodiment provides a leak detection method for a lithium-ion battery. By adopting the leak detection device of Embodiment 1, the difference between this embodiment and Embodiment 2 is that this embodiment uses the lithium-ion battery forward (pole upward direction) on the loading tray structure 100, and then install the loading tray structure 100 on the test platform 200 for testing after turning over the loading tray structure 100, which specifically includes the following steps:

[0077] S1. Install several batteries 300 on the loading tray structure 100 sequentially in the forward direction (the poles of the batteries are upward).

[0078] Specifically:

[0079] Firstly, the battery 300 is grabbed and placed in the clamping area formed by the adjacent clamping blocks 5 sequentially by the manipulator;

[0080] Again, the inserting block 3 is clamped by the manipulator and installed on the loading tray 1, so that the clamping block 5 clamps the battery...

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Abstract

The invention provides a leakage detection device for a lithium ion battery, which comprises a loading disc structure, a battery is loaded on the loading disc structure, the loading disc structure is detachably mounted on a test platform, a test hole corresponding to the battery is formed in the test platform, and test paper is arranged in the test hole. The loading disc structure loaded with the battery is mounted on the test platform after being positively mounted or turned over, so that the battery is in contact with and clings to the test paper after being inverted, and the test paper is used for detecting whether a leak hole exists in a welding seam of the battery to cause electrolyte leakage or not. The leakage detection device is used for conveniently, quickly and efficiently screening the lithium ion batteries subjected to laser welding and screening the unqualified lithium ion batteries with leakage holes in welding seams, so that the risk of combustion or explosion caused by electrolyte leakage is avoided.

Description

technical field [0001] The invention belongs to the technical field of battery manufacturing, and relates to a lithium-ion battery detection technology, in particular to a lithium-ion battery leak detection device and a leak detection method. Background technique [0002] With the development of science and technology, lithium batteries are used in more and more equipment such as new energy vehicles, electric vehicles, and mobile phones. Laser welding the package to form a complete battery. [0003] Usually, during the laser welding process, a weld seam will be formed between the cell cover plate and the shell. Due to factors such as laser instability, cover plate impurities, aluminum shell impurities, butt gap deviation, etc., leaks may occur at the weld joint The phenomenon. The formed leaks are usually on the micron scale, and micron-scale small leaks cannot be effectively screened by humans or inspection instruments during the manufacturing process. If they are assembl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/20
CPCG01M3/20
Inventor 杜博炎崔立丰
Owner 湖南领湃科技股份有限公司
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