Patent ID: 7622218

Claim:
A method for producing an electrode for a non-aqueous electrolyte secondary battery, said electrode being in sheet form and designed to be spirally wound onto a winding core together with an electrode of opposite polarity and a separator, said method comprising the steps of: forming an electrode mixture layer on each side of a current collector, to produce an electrode in sheet form; and bending said electrode in the longitudinal direction thereof, to cause a large number of cracks in at least the electrode mixture layer on the winding core side such that the cracks extend from the surface of the electrode mixture layer to the current collector in the direction intersecting with the longitudinal direction of the electrode, wherein said step of bending the electrode comprises the steps of: bending the electrode at a curvature that is smaller than that of said winding core at least once; and thereafter bending the electrode at a curvature that is equal to or larger than that of said winding core.