Title:
DISCONNECTION TESTING DEVICE AND DISCONNECTION TESTING METHOD FOR ELECTRODE TAB OF BATTERY CELL
Document Type and Number:
WIPO Patent Application WO/2023/014056
Kind Code:
A1
Abstract:
A disconnection testing device for an electrode tab of a battery cell according to the present invention comprises: a measurement unit for measuring impedance values and impedance angles in accordance with the frequency of a battery cell to be tested; a calculation unit for calculating real part resistance values of impedance in accordance with the frequency of the battery cell to be tested, from the impedance values and the impedance angles; and a determination unit for testing whether or not an electrode tab of the battery cell to be tested is disconnected, by comparing the real part resistance values of a real part resistance value domain in the 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)
PARK SANG DAE (KR)
KIM JU YOUNG (KR)
CHO IN HWAN (KR)
PARK SANG DAE (KR)
KIM JU YOUNG (KR)
CHO IN HWAN (KR)
Application Number:
PCT/KR2022/011408
Publication Date:
February 09, 2023
Filing Date:
August 02, 2022
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
H01M10/42; G01R31/389; G01R31/52
Foreign References:
| KR20200035594A | 2020-04-06 | |||
| KR20180002224A | 2018-01-08 | |||
| KR20190048000A | 2019-05-09 | |||
| KR20130012569A | 2013-02-04 | |||
| KR100770727B1 | 2007-10-30 | |||
| KR20210104021A | 2021-08-24 | |||
| KR20200035594A | 2020-04-06 |
Other References:
See also references of EP 4220812A4
Attorney, Agent or Firm:
KIM, Hong Gyun (KR)
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