WELDING QUALITY INSPECTION DEVICE AND WELDING QUALITY INSPECTION METHOD

WIPO Patent Application WO/2022/191581

A1

The present specification relates to a welding quality inspection device with respect to a welding region of a secondary battery, and provides a welding quality inspection device comprising: a measurement part including a first resistance measurement member for directly contacting a first measurement point and measuring a resistance value, and a second resistance measurement member for directly contacting a second measurement point and measuring a resistance value; and a control part for sorting out a defective product by determining as a welding defect when a resistance value obtained from the measurement part exceeds a threshold resistance value, wherein the first measurement point is located on a first electrode terminal exposed to the outside of the secondary battery, the second measurement point is located on a welding portion of a first electrode collector plate provided inside the secondary battery, and the second resistance measurement member comes in contact on the welding portion of the first electrode collector plate existing inside the secondary battery, through a winding hole of an electrode assembly in an opposite side of the first electrode terminal.

LIM JAE WON (KR)
LEE JE JUN (KR)
KIM HAK KYUN (KR)
MUN HONG JAE (KR)

PCT/KR2022/003269

September 15, 2022

March 08, 2022

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LG ENERGY SOLUTION LTD (KR)

B23K31/12; B23K101/36; B23K103/10

WO2021020892A1

2021-02-04

JP2000268887A	2000-09-29
KR101887148B1	2018-08-09
KR20170110331A	2017-10-11
KR100922352B1	2009-10-21
KR20210030275A	2021-03-17

CHOI, Hee-Kyeong (KR)

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