| 摘要 |
First, a positive electrode plate and a negative electrode plate, each having a flat-plate shape, are wound with a separator is sandwiched between the electrode plates, while being pressed in a diametral direction by means of a pair of winding rolls (6), to form an electrode roll body (E'). Then, the formed electrode roll body (E') is held by a pair of chucks (7) in a diametral direction against elastic force causing a diametral expansion. Then, the electrode roll body (E') held in a diametral direction is inserted into a circular hole (8a) formed in a frame (8) and having a predetermined diameter (D). Thereafter, the holding by the pair of chucks (7) in a diametral direction is released to elastically expand the diameter of the electrode roll body (E'). Then, after current collectors (4) are welded to both ends of the expanded electrode roll body (E') so as to prevent its diameter (D) from varying, the electrode roll body (E') is extracted from the frame (8). <IMAGE> |
