US 11,721,839 B2
Electrode assembly with improved connection between electrode tabs
Kyung Min Kim, Daejeon (KR)
Assigned to LG Energy Solution, Ltd.
Appl. No. 16/765,374
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Mar. 22, 2019, PCT No. PCT/KR2019/003390
§ 371(c)(1), (2) Date May 19, 2020,
PCT Pub. No. WO2019/245137, PCT Pub. Date Dec. 26, 2019.
Claims priority of application No. 10-2018-0071078 (KR), filed on Jun. 20, 2018.
Prior Publication US 2020/0343519 A1, Oct. 29, 2020
Int. Cl. H01M 10/0585 (2010.01); H01M 50/574 (2021.01); H01M 50/536 (2021.01); H01M 50/581 (2021.01); H01M 10/42 (2006.01); H01M 50/54 (2021.01); H01M 50/534 (2021.01)
CPC H01M 10/0585 (2013.01) [H01M 10/4235 (2013.01); H01M 50/536 (2021.01); H01M 50/574 (2021.01); H01M 50/581 (2021.01); H01M 50/534 (2021.01); H01M 50/54 (2021.01); H01M 2200/00 (2013.01); H01M 2200/106 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electrode assembly comprising:
an electrode laminate including a plurality of unit cells, each unit cell of the plurality of unit cells formed of a positive electrode having an electrode tab extending from an end thereof, a negative electrode having an electrode tab extending from an end thereof, and a separator disposed between the positive electrode and the negative electrode; and
a conductive adhesion portion that is disposed between all of a plurality of adjacent electrode tabs of the positive electrode and all of a plurality of adjacent electrode tabs of the negative electrode, and connecting the electrode tabs of the positive electrode to each other or connecting the electrode tabs of the negative electrode to each other,
wherein the conductive adhesion portion includes a conductive material, an adhesive material, and a safety element material,
wherein the safety element material is applied in the form of a slurry,
wherein the safety element material includes a gas generation material, wherein a gas is generated when the gas generation material reaches a decomposition voltage, thereby increasing a volume of the conductive adhesion portion, and
wherein the gas generation material is Li2CO3, K2CO3, CaCO3, BaCO3, or SrCO3,
wherein a topmost electrode tab of the positive electrodes included in the laminate is welded to one side of an electrode lead.