| 摘要 |
PROBLEM TO BE SOLVED: To provide an enclosed type battery that has a good sealing characteristic at the portion of the filler hole of the electrolyte. SOLUTION: In an enclosed type battery in which the filler hole provided in the battery can or the lid sealing the opening of the battery can is sealed, the filler hole 5 has a taper face 9 of which area widens toward the outer wall and a cylindrical part 8 that is joined with the taper face and extends toward the inner wall. And a plug 7 which engages with the taper face and the cylindrical part of the filler hole and of which top part is positioned on the same plane as the outer wall is engaged and fitted, and the plug and the wall of the battery can or the lid are fusion bonded 13. |
