Title:
METHOD FOR INSPECTING STATE OF WELDS IN BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/287078
Kind Code:
A1
Abstract:
The present invention provides a method for inspecting the state of welds in a battery, the state of welds being inspected for a battery having: a tap or current collection plate welded to a current collector of an electrode assembly in which the current collector and separation film have been wound or stacked; and a can housing or electrode lead welded to the tap or current collector plate. The method comprises: a first impedance measurement step for measuring first impedance by applying, prior to injecting electrolyte into a battery, alternating current or alternating voltage at a set frequency band; a first Cole-Cole plot preparation step for preparing a first Cole-Cole plot on the basis of the first impedance; and a primary state of welds determination step for determining the state of welds of the battery on the basis of x fractional value on the first Cole-Cole plot.
Inventors:
LEE JUNG HOON (KR)
JUNG SU TAEK (KR)
JUNG SU TAEK (KR)
Application Number:
PCT/KR2022/009488
Publication Date:
January 19, 2023
Filing Date:
July 01, 2022
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
H01M50/538; B23K31/12; G01N27/02; H01M10/04
Foreign References:
| KR101889592B1 | 2018-08-17 | |||
| CN111693573A | 2020-09-22 | |||
| US10274448B2 | 2019-04-30 | |||
| KR20190053014A | 2019-05-17 | |||
| KR20070107921A | 2007-11-08 | |||
| KR20210091698A | 2021-07-22 |
Attorney, Agent or Firm:
KIM, Aera (KR)
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