US 12,438,200 B2
Battery cell and battery system including the same
Jong Pil Park, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/787,618
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Apr. 21, 2021, PCT No. PCT/KR2021/004999
§ 371(c)(1), (2) Date Jun. 21, 2022,
PCT Pub. No. WO2021/230516, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 10-2020-0056952 (KR), filed on May 13, 2020.
Prior Publication US 2022/0416314 A1, Dec. 29, 2022
Int. Cl. H01M 10/42 (2006.01); H01M 10/48 (2006.01); H01M 50/533 (2021.01)
CPC H01M 10/425 (2013.01) [H01M 10/482 (2013.01); H01M 50/533 (2021.01); H01M 2010/4271 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A battery cell, comprising:
an electrode assembly;
a case configured to accommodate the electrode assembly;
a first lead electrode electrically connected to at least one of two electrode tabs of the electrode assembly;
a conductive polymer including a first surface that is in contact with a first surface of the first lead electrode; and
a second lead electrode including a first surface that is in contact with a second surface of the conductive polymer,
wherein the conductive polymer is positioned between first lead electrode and the second lead electrode and wherein an interface between the conductive polymer and the first and second lead electrodes is configured such that an increase in internal pressure of the electrode assembly within the case causes the conductive polymer to expand, wherein expansion of the conductive polymer increases a distance between the first lead electrode and the second lead electrode through the conductive polymer and correspondingly increases a resistance between the first lead electrode and the second lead electrode.