| 摘要 |
PURPOSE: A battery is provided to authentically seal the surrounding of a through hole of a battery case to which a rivet is penetrated. CONSTITUTION: A battery includes a rivet either inserted into a through hole(2A) defined in a lid of a battery case with gaskets and interposed therebetween, the rivet connecting a current collector connected to a power generating element within the battery case(9) and an external terminal(5). One end of the rivet in the axial direction is connected to the current collector, and provided with a tubular portion(4D) recessed in the axial direction, the tubular portion is defined in one of such manners that a bottom surface of the tubular portion reaches the lid of the battery case and that the bottom surface is positioned on a side of the other end beyond the lid of the battery case, and a thickness of the tubular portion increases from the one end toward the other end. |
