US 12,482,852 B2
Manufacturing method of lithium secondary battery including a step of charging the battery based on a cathode load amount
Hyunwoong Yun, Daejeon (KR); Ohbyong Chae, Daejeon (KR); Jeongbeom Lee, Daejeon (KR); Byong Seon Lee, Daejeon (KR); and Hoejin Hah, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/623,698
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Oct. 14, 2020, PCT No. PCT/KR2020/013959
§ 371(c)(1), (2) Date Dec. 29, 2021,
PCT Pub. No. WO2021/091108, PCT Pub. Date May 14, 2021.
Claims priority of application No. 10-2019-0141790 (KR), filed on Nov. 7, 2019; and application No. 10-2020-0129950 (KR), filed on Oct. 8, 2020.
Prior Publication US 2022/0278358 A1, Sep. 1, 2022
Int. Cl. H01M 10/052 (2010.01); H01M 4/04 (2006.01); H01M 4/38 (2006.01); H01M 4/485 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01); H01M 10/44 (2006.01); H01M 4/02 (2006.01)
CPC H01M 10/0525 (2013.01) [H01M 4/0404 (2013.01); H01M 4/382 (2013.01); H01M 4/485 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 10/446 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for manufacturing a lithium secondary battery comprising the steps of:
assembling a battery comprising an anode having an anode active material layer coated onto at least one surface of an anode current collector; a cathode having a cathode active material layer coated onto at least one surface of a cathode current collector; a separator; and an electrolyte, and
charging the battery,
wherein in the step of assembling the battery, a ratio of an anode load amount to a cathode load amount (N/P ratio) is 0.01 to 0.99,
wherein in the step of charging the battery, the charging is performed based on the cathode load amount,
wherein in the step of charging the battery, lithium is plated on pores and surfaces of the anode active material layer to form a lithium metal layer on at least one surface of the anode active material layer,
wherein the battery charging step comprises a first charging and a second charging in succession, and
wherein in the step of charging the battery, a charging current of second charging is lower than a charging current of first charging.