Method for rolling electrode hoop
In a rolling step of feeding an electrode hoop ( 1 ) having electrode mixture layers ( 3 a, 3 b ) formed on both sides of a band-shaped core ( 2 ) made of a metal thin plate to between a pair of mill rolls ( 8 a, 8 b ) for rolling, the electrode hoop ( 1 ) is fed so that side a is wound about one of the mill rolls if the electrode mixture layers ( 3 a, 3 b ) of the electrode hoop ( 1 ) have different average thicknesses, where the side a is one of the electrode mixture layers of the electrode hoop ( 1 ) having the smaller average thickness and side b is the other. This realizes a method for rolling an electrode hoop capable of making a rolled flat electrode even if the electrode mixture layers on both sides of the core have respective different thicknesses.
1. A method for rolling an electrode hoop, comprising:
a feeding step of feeding an electrode hoop having electrode mixture layers formed on both sides of a band-shaped core made of a metal thin plate;
a rolling step of feeding the electrode hoop to between a pair of mill rolls for rolling; and
a winding step of winding up the rolled electrode hoop,
wherein the electrode mixture layers on both sides of the electrode hoop have respective different average thicknesses, and in the rolling step, the electrode hoop is fed so that side a is wound about one of the mill rolls on the condition that the side a makes contact with one of the mill rolls over a wide area and the other side b makes contact with the other of the mill rolls in a narrow area, where the side a is one of the electrode mixture layers of the electrode hoop having a smaller average thickness and side b is the other.
2. The method for rolling an electrode hoop according to claim 1 , wherein A/B is set between 0.1 inclusive and 1 exclusive, where A is the thickness of the thinner electrode mixture layer of the electrode hoop and B is the thickness of the other before rolling.