US 12,142,790 B2
Electrode assembly and secondary battery comprising the same
In Seop Byun, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by Samsung SDI Co., Ltd., Yongin-si (KR)
Filed on Aug. 17, 2021, as Appl. No. 17/445,291.
Claims priority of application No. 10-2020-0104607 (KR), filed on Aug. 20, 2020.
Prior Publication US 2022/0059905 A1, Feb. 24, 2022
Int. Cl. H01M 50/46 (2021.01); H01M 4/13 (2010.01); H01M 10/052 (2010.01); H01M 10/0587 (2010.01); H01M 50/105 (2021.01); H01M 50/531 (2021.01)
CPC H01M 50/46 (2021.01) [H01M 4/13 (2013.01); H01M 10/052 (2013.01); H01M 10/0587 (2013.01); H01M 50/105 (2021.01); H01M 50/531 (2021.01)] 18 Claims
OG exemplary drawing
 
1. A wound electrode assembly comprising:
a first electrode plate having a first electrode uncoated portion spaced apart from both ends in a longitudinal direction thereof, the first electrode uncoated portion has a first surface and a second surface facing away from the first surface, and a base tab on the first surface of the first electrode uncoated portion;
a second electrode plate having a second electrode coated portion coated with a second electrode active material and a second electrode uncoated portion spaced apart from both ends in a longitudinal direction thereof, the second electrode uncoated portion has a first surface and a second surface facing away from the first surface, and a base tab on the first surface of the second electrode uncoated portion;
a separator between the first electrode plate and the second electrode plate;
a tab cover tape attached to the first surface of each of the first electrode uncoated portion and the second electrode uncoated portion;
an uncoated portion cover tape attached to the second surface of each of the first electrode uncoated portion and the second electrode uncoated portion; and
an insulating tape attached onto the second electrode plate at a position aligned with the first electrode uncoated portion, the insulating tape comprising a first insulating tape directly attached onto only the second electrode active material,
wherein the first insulating tape is greater in size than the first electrode uncoated portion along the longitudinal direction of the first electrode plate.