Rolling apparatus for secondary battery electrode sheet, cathode electrode manufactured thereby and secondary battery

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.