US 12,322,786 B2
Negative electrode for lithium secondary battery, and magnetic alignment device for negative electrode for same
Jong Su Yoon, Daejeon (KR); Young Gon Kim, Daejeon (KR); Taek Soo Lee, Daejeon (KR); Jin Ho Cho, Daejeon (KR); and Shin Wook Jeon, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 18/719,377
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Sep. 21, 2023, PCT No. PCT/KR2023/014426
§ 371(c)(1), (2) Date Jun. 13, 2024,
PCT Pub. No. WO2024/080617, PCT Pub. Date Apr. 18, 2024.
Claims priority of application No. 10-2022-0131366 (KR), filed on Oct. 13, 2022.
Prior Publication US 2024/0429366 A1, Dec. 26, 2024
Int. Cl. H01M 4/1393 (2010.01); H01F 7/02 (2006.01); H01F 7/20 (2006.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/133 (2010.01)
CPC H01M 4/1393 (2013.01) [H01F 7/0273 (2013.01); H01F 7/20 (2013.01); H01M 4/0404 (2013.01); H01M 4/133 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A magnetic alignment device for negative electrode, comprising:
a first magnet part and a second magnet part positioned at respective upper and lower portions of the magnetic alignment device, the first magnet part and the second magnet part being configured to apply a magnetic force along a transfer direction of a negative electrode current collector to which a negative electrode slurry is applied, wherein the negative electrode slurry includes a carbon-based negative electrode active material; and
a drying part configured to dry the negative electrode slurry applied with the magnetic force,
wherein the first magnet part and the second magnet part are respectively divided into a first region located upstream and a second region located downstream relative to the transfer direction of the negative electrode current collector,
a magnetic force of the first region is 9,000 G to 11,000 G, and
a magnetic force of the second region is 5,500 G to 6,500 G.