US 12,347,844 B2
Electrode rolling apparatus comprising non-coating portion pressing part and electrode rolling method using the same
Jung Eun Lee, Daejeon (KR); Hwan Han Kim, Daejeon (KR); Jeong Soo Seol, Daejeon (KR); Jaehyuk Choi, Daejeon (KR); and Soohyung Hong, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/641,296
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed May 20, 2021, PCT No. PCT/KR2021/095038
§ 371(c)(1), (2) Date Mar. 8, 2022,
PCT Pub. No. WO2021/235917, PCT Pub. Date Nov. 25, 2021.
Claims priority of application No. 10-2020-0061401 (KR), filed on May 22, 2020; and application No. 10-2021-0063928 (KR), filed on May 18, 2021.
Prior Publication US 2022/0285665 A1, Sep. 8, 2022
Int. Cl. H01M 4/04 (2006.01)
CPC H01M 4/0435 (2013.01) [H01M 4/0471 (2013.01)] 14 Claims
OG exemplary drawing
 
11. An electrode rolling method comprising:
a method for rolling an electrode substrate including a current collector and an electrode composite layer formed on one surface or both surfaces of the current collector,
pressing a non-coating portion region of the electrode substrate using a pair of non-coating portion rolling rollers including a structure with surface unevenness to form an unevenness pattern on the non-coating portion region of the electrode substrate;
rolling the electrode substrate, and
induction-heating a partial region of a coating portion and an entire region of the non-coating portion based on a boundary line between the coating portion and the non-coating portion of the electrode substrate,
wherein the pair of non-coating portion rolling rollers includes a first non-coating portion rolling roller located at an upper portion of the current collector and made of a first material, and a second non-coating portion rolling roller located at a lower portion of the current collector and made of a second material, and
wherein a friction coefficient of a surface of the first material of the first non-coating portion rolling roller is lower than the friction coefficient of a surface of the second material of the second non-coating portion rolling roller.