US 12,440,877 B2
Rolling apparatus for secondary battery electrode sheet, cathode electrode manufactured thereby and secondary battery
Yun Jong Kim, Daejeon (KR); Se Hun Park, Daejeon (KR); Joon Sup Kim, Gyeongsangbuk-do (KR); Young Cheol Lee, Gyeongsangbuk-do (KR); and Sung Youl Choi, Gyeongsangbuk-do (KR)
Assigned to SK On Co., Ltd., Seoul (KR); and People and Technology, Inc., Gyeongsangbuk-do (KR)
Filed by SK On Co., Ltd., Seoul (KR); and People and Technology, Inc., Gyeongsangbuk-do (KR)
Filed on Mar. 20, 2023, as Appl. No. 18/186,198.
Claims priority of application No. 10-2022-0035862 (KR), filed on Mar. 23, 2022.
Prior Publication US 2023/0311180 A1, Oct. 5, 2023
Int. Cl. B21B 1/24 (2006.01); B21B 45/02 (2006.01); H01M 4/04 (2006.01)
CPC B21B 1/24 (2013.01) [B21B 45/0218 (2013.01); H01M 4/0435 (2013.01); B21B 2267/06 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A rolling apparatus for a secondary battery electrode sheet, comprising:
a transfer unit transferring an electrode sheet having an electrode mixture layer applied to at least one surface thereof in a first direction;
a rolling roll pressing the electrode sheet in a second direction, intersecting the first direction; and
a support portion coupled to a rotational axis of the rolling roll to support rotation of the rolling roll,
wherein the rolling roll has a shape in which a central portion thereof in an axial direction protrudes further toward both end portions of thereof in an axial direction,
wherein the support portion comprises:
a first support portion disposed outside the rolling roll in a longitudinal direction of the rotational axis, the first support portion including a first bearing that is pressed in a direction in which the rolling roll presses the electrode sheet, and a first housing in which the first bearing is accommodated; and
a second support portion disposed outside the first support portion in a longitudinal direction of the rotational axis, the second support portion including a second bearing that is pressed in a direction, opposite to the direction in which the first bearing is pressed, and a second housing in which the second bearing is accommodated.