US 12,249,720 B2
Electrode assembly having enhanced safety and lithium secondary battery comprising same
Hye Ran Jung, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/633,452
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed May 3, 2021, PCT No. PCT/KR2021/005538
§ 371(c)(1), (2) Date Feb. 7, 2022,
PCT Pub. No. WO2021/230547, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 10-2020-0057619 (KR), filed on May 14, 2020; and application No. 10-2021-0056840 (KR), filed on Apr. 30, 2021.
Prior Publication US 2022/0285694 A1, Sep. 8, 2022
Int. Cl. H01M 4/76 (2006.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 10/052 (2010.01)
CPC H01M 4/762 (2013.01) [H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 4/0473 (2013.01); H01M 10/052 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An electrode assembly comprising a positive electrode active material layer, a positive electrode current collector, a separator, a negative electrode current collector, and a negative electrode active material layer sequentially stacked in an order listed,
wherein the positive and negative current collectors include a plurality of through holes, and each of the through holes perforates through the positive and negative current collectors from an upper surface to a lower surface of the positive and negative current collectors,
wherein a part of a positive electrode mixture of the positive electrode active material layer or a negative electrode mixture of the negative electrode active material layer is filled in a part of an inside of the through hole, and
wherein a thickness of the positive electrode mixture or the negative electrode mixture in the through hole is 1% to 50% of a thickness of the current collector.