DOUBLE-VACUUM FOUR-CAVITY AIR TIGHTNESS TESTING METHOD AND TESTER FOR SQUARE SHELL BATTERY

WIPO Patent Application WO/2024/007732

A1

The present invention provides a double-vacuum four-cavity air-tightness testing method and tester for a square shell battery. The tester comprises a loading apparatus, four cavity apparatuses, four cavity cover apparatuses, four transfer apparatuses, two vacuum apparatuses, a testing apparatus, and an unloading apparatus; the cavity apparatuses and the cavity cover apparatuses can be combined into sealed compartments, and two sealed compartments are predetermined for each vacuum apparatus. During simultaneous operation, the four sealed compartments are sequentially subjected to loading for 8 s, vacuum pumping for 10 s and then air-tightness testing for 5 s (a total of 15 s), and unloading for 8 s, and the takt time is shortened to 8 s; the production cycle is shortened to 32 s; and the production efficiency of air-tightness testing is improved to 15 PPM according to two batteries/cavities. Moreover, according to the present invention, one pump is used for one sealed compartment to implement a minimal vacuum system, and after a sealed compartment is contaminated by a tracer gas leaked from a battery under test, only the parts related to said sealed compartment need to be cleaned, so that downtime losses caused by cleaning can be minimum.

CHEN XI (CN)
LIU YANGDONG (CN)
DENG QIAOBING (CN)
PEI DOUDOU (CN)

PCT/CN2023/093763

January 11, 2024

May 12, 2023

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SHENZHEN UTIMES INTELLIGENT EQUIPMENT CO LTD (CN)

G01M3/20

CN115096516A	2022-09-23
CN108237089A	2018-07-03
CN108584359A	2018-09-28
CN106885656A	2017-06-23
CN105327863A	2016-02-17
CN112471247A	2021-03-12
CN209167511U	2019-07-26
CN216784870U	2022-06-21
US4748094A	1988-05-31

ZHEJIANG XIUYUAN LAW FIRM (CN)

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