US 12,148,892 B2
Method for recovering lithium battery cell by heat treatment and method for manufacturing lithium battery cell comprising the same
Hyunjun Choi, Daejeon (KR); Youngdeok Kim, Daejeon (KR); and Daesoo Kim, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/274,974
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Jun. 25, 2020, PCT No. PCT/KR2020/008261
§ 371(c)(1), (2) Date Mar. 10, 2021,
PCT Pub. No. WO2021/033904, PCT Pub. Date Feb. 25, 2021.
Claims priority of application No. 10-2019-0101266 (KR), filed on Aug. 19, 2019.
Prior Publication US 2022/0158260 A1, May 19, 2022
Int. Cl. H01M 10/42 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 10/4242 (2013.01) [H01M 10/0525 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of recovering a degenerated lithium battery cell,
the method comprising:
subjecting a lithium battery cell degenerated by 5% or more to a high temperature treatment for 1 to 6 hours at a temperature within the range of 75° C. to 100° C. in a fully discharged state,
wherein the lithium battery cell comprises an electrode assembly including a positive electrode, a negative electrode and a separator interposed therebetween, which is impregnated with a non-aqueous electrolyte and embedded in a battery case, and
wherein the entire lithium battery cell is maintained at the temperature within the range of 75° C. to 100° C.