US 12,341,202 B2
Pouch type secondary battery, battery pack, and method for manufacturing pouch type secondary battery
Seong Yoon Lim, Daejeon (KR); Han Kil Kim, Daejeon (KR); Hey Woong Park, Daejeon (KR); Jeong Wan Yoo, Daejeon (KR); Woo Sup Kim, Daejeon (KR); Jae Hong Shim, Deajeon (KR); Seung Ho Na, Daejeon (KR); and Sung Won Lee, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/776,431
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Dec. 3, 2020, PCT No. PCT/KR2020/017534
§ 371(c)(1), (2) Date May 12, 2022,
PCT Pub. No. WO2021/112582, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. 10-2019-0159032 (KR), filed on Dec. 3, 2019; and application No. 10-2020-0167153 (KR), filed on Dec. 3, 2020.
Prior Publication US 2022/0407152 A1, Dec. 22, 2022
Int. Cl. H01M 50/105 (2021.01); H01M 10/04 (2006.01); H01M 50/178 (2021.01); H01M 50/186 (2021.01); H01M 50/46 (2021.01); H01M 50/56 (2021.01)
CPC H01M 50/105 (2021.01) [H01M 10/049 (2013.01); H01M 50/178 (2021.01); H01M 50/186 (2021.01); H01M 50/46 (2021.01); H01M 50/56 (2021.01)] 16 Claims
OG exemplary drawing
 
1. A pouch type secondary battery comprising:
an electrode assembly having a structure in which electrodes and a separator are alternately disposed;
a pouch type exterior in which a cup having a shape recessed to accommodate the electrode assembly is formed, the pouch type exterior comprising a first area and a second area, a folding part is formed at a boundary between the first area and the second area so that the first area is folded with respect to the second area, and the first area and the second area face each other; and
at least one electrode lead electrically connected to the electrode assembly and protruding outward through a periphery of the pouch type exterior,
wherein a sealing part is formed on the pouch type exterior along a periphery of the electrode assembly,
the at least one electrode lead comprises a first electrode lead protruding outward through an upper periphery of the pouch type exterior and a second electrode lead protruding outward through a lower periphery of the pouch type exterior,
the sealing part comprises a first sealing part covering the first electrode lead and a second sealing part covering the second electrode lead, and
at least one of a left end or a right end of the first sealing part adjacent to the folding part is formed below an upper end of a periphery of the electrode assembly, and at least one of a left end or a right end of the second sealing part adjacent to the folding part is formed above a lower end of the periphery of the electrode assembly.