Title:
DISCONNECTION TESTING APPARATUS FOR ELECTRODE TAB OF BATTERY CELL
Document Type and Number:
WIPO Patent Application WO/2023/075273
Kind Code:
A1
Abstract:
A disconnection testing apparatus for an electrode tab of a battery cell, according to the present invention, comprises: a measurement unit which measures impedance values and impedance angles according to the frequency of a battery cell to be tested; a calculation unit which calculates real part resistance values of impedance according to the frequency of the battery cell to be tested, from the impedance values and the impedance angles; and a determination unit which tests whether or not an electrode tab of the battery cell to be tested is disconnected, by comparing real part resistance values of a real part resistance value domain in a resonance frequency domain of good-quality battery cells of the same type as the battery cell to be tested and the real part resistance values of the impedance of the battery cell to be tested in a frequency range of a domain which is the same as the resonance frequency domain.
Inventors:
LEE JU MI (KR)
KIM JU YOUNG (KR)
CHO IN HWAN (KR)
KIM JU YOUNG (KR)
CHO IN HWAN (KR)
Application Number:
PCT/KR2022/015899
Publication Date:
May 04, 2023
Filing Date:
October 18, 2022
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
G01R31/392; G01R1/073; G01R31/36; G01R31/367; G01R31/389; G01R31/52
Foreign References:
| KR20210107997A | 2021-09-02 | |||
| KR102151175B1 | 2020-09-03 | |||
| JPH11176465A | 1999-07-02 | |||
| KR20200023672A | 2020-03-06 | |||
| KR20120064630A | 2012-06-19 | |||
| KR20210142779A | 2021-11-25 | |||
| KR20200035594A | 2020-04-06 |
Attorney, Agent or Firm:
KIM, Hong Gyun (KR)
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