| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage device in which liquid junction between an electrode terminal and a case can be suppressed suitably.SOLUTION: A secondary battery includes seal rings 53, 73 interposed between the facing surfaces of the terminal heads 51, 71 of electrode terminals 15, 16 and a lid 13, and sealing between the facing surfaces, and terminal insulation members 57, 77 interposed between the facing surfaces on the radial outside thereof, and insulating the lid 13 and the terminal heads 51, 71. The lid 13 includes annular grooves 90, 91 at the parts of the inner surface 13a thereof facing the terminal heads 51, 71. The inner peripheral side face of the grooves 90, 91 extends along the outer periphery of the abutting part of the inner surface 13a and seal rings 53, 73, and the outer peripheral side face is located radially outside of the inner periphery of the terminal insulation members 57, 77.SELECTED DRAWING: Figure 5 |
