US 12,224,402 B2
Electrochemical element for inducing internal short circuit, and method for evaluating safety using same
Tae Jong Kim, Daejeon (KR); and Seo Young Yoon, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/433,788
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Jul. 28, 2020, PCT No. PCT/KR2020/009920
§ 371(c)(1), (2) Date Aug. 25, 2021,
PCT Pub. No. WO2021/025358, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 10-2019-0096020 (KR), filed on Aug. 7, 2019.
Prior Publication US 2022/0140401 A1, May 5, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 10/0585 (2010.01); G01R 31/52 (2020.01); H01M 10/42 (2006.01); H01M 50/463 (2021.01)
CPC H01M 10/0585 (2013.01) [G01R 31/52 (2020.01); H01M 10/4235 (2013.01); H01M 50/463 (2021.01)] 11 Claims
OG exemplary drawing
 
1. An electrochemical device comprising a positive electrode, a separator and a negative electrode, which are sequentially stacked,
wherein the separator has at least one through hole communicating between the positive electrode and the negative electrode,
wherein at least one interface between the positive electrode and the separator or between the negative electrode and the separator includes a spacer placed at a position not overlapping with the through hole, and
wherein the interface on which the spacer is placed includes a through-hole cover material containing a magnetic material.