Patent ID: 8163040

Claim:
A method for manufacturing a cylindrical battery, the method comprising: allowing a cylindrical battery case with a bottom to contain an electrode plate group; carrying out groove-forming processing on an outside periphery of an opening of the battery case; disposing a sealing plate in the opening of the battery case through a gasket; and crimping and sealing an end of the opening of the battery case, wherein: in the groove-forming processing, the battery case is rotated and a rotatable groove-forming roller comes into contact with and is gradually pushed into the outside periphery of the opening of the battery case in a state where a core corresponding to a diameter of the opening of the battery case is fitted into the opening of the battery case to support the battery case from an inner peripheral side, and in the groove-forming processing, a rotational speed is set based on size of the battery so that a push-in amount of the groove-forming roller per unit rotation perimeter and per unit of time becomes a certain value even when the diameter of the battery case varies in size.