| 摘要 |
A battery provided by the present invention includes a sealing plate (20) for closing an opening portion in a case for housing an electrode body unit. A fitting convex portion (24) that intrudes into the case opening portion when the sealing plate is attached to a predetermined position of the case opening portion is formed on a rear surface side of the sealing plate. The sealing plate is subjected to thickness increasing molding in a pressing process such that at least a part (27A) of an outer peripheral part (25, 27) of the fitting convex portion that contacts a peripheral edge of the case opening portion is thicker than an inner part (28) of the fitting convex portion that does not contact the peripheral edge of the case opening portion. |
