Title:
NON-DESTRUCTIVE INSPECTION METHOD FOR INTERNAL CRACK IN POUCH-TYPE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2022/235032
Kind Code:
A1
Abstract:
A non-destructive inspection method for an internal crack in a pouch-type secondary battery, according to the present invention, comprises an input signal transmission step, an output signal reception step, a first signal pattern detection step, a second signal pattern detection step, a first crack state determination step, and a second crack state determination step. In the input signal transmission step, an input signal is transmitted toward an inspection area. In the output signal reception step, an output signal that is transformed while passing through the inspection area is received. In the first signal pattern detection step, the output signal and a preset reference signal are compared, and a first difference value between the output signal and the reference signal is detected, the first difference value caused by asymmetry between a first output signal area of the output signal disposed on one side and a second output signal area of the output signal disposed on the other side with respect to the center line of the reference signal. In the second signal pattern detection step, the output signal and the reference signal are compared, and a second difference value between the center value of the reference signal positioned on the center line of the reference signal and the center value of the output signal positioned on the center line of the output signal is detected. In the first crack state determination step, the first difference value and a preset first tolerance value are compared to determine whether a partial crack is present in the inspection area. In the second crack state determination step, the second difference value and a preset second tolerance value are compared to determine whether a complete crack is present in the inspection area.
Inventors:
CHOI BAEK YOUNG (KR)
KIM SEUNG GON (KR)
KOO SANG MOON (KR)
KIM JUNG WON (KR)
KIM SEUNG GON (KR)
KOO SANG MOON (KR)
KIM JUNG WON (KR)
Application Number:
PCT/KR2022/006240
Publication Date:
November 10, 2022
Filing Date:
May 02, 2022
Export Citation:
Assignee:
INNEREYE CO LTD (KR)
International Classes:
H01M10/42; G01N27/90
Foreign References:
| KR102023739B1 | 2019-09-20 | |||
| KR20040045936A | 2004-06-05 | |||
| KR102227538B1 | 2021-03-15 | |||
| JPH09297074A | 1997-11-18 | |||
| JP2014211455A | 2014-11-13 |
Attorney, Agent or Firm:
KIM, Tae Wan (KR)
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