| 摘要 |
A manufacturing method for a sealed type battery according to the present invention includes: a step (a) for accommodating an electrode group in a battery case (10); a step (b) for forming an annular groove part (30) in a side wall of the battery case (10); and a step (c) for placing on an upper part (30a) of the groove part (30) a sealing plate (20) of which an outer periphery part is held by a gasket (21), caulking an open end (10a) of the battery case (10), and air-tightly sealing an opening of the battery case (10) by the sealing plate (20). Further, in the step (b), the upper part (30a) of the groove part (30) is formed to be substantially horizontal from the side wall of the battery case (10) to a radially inner side, and in the step (c), the open end (10a) of the battery case (10) is caulked to be substantially parallel with the upper part (30a) of the groove part (30) while the upper part (30a) of the groove part (30) is maintained to be substantially horizontal. |
