| 摘要 |
PURPOSE:To obtain a flat sealed battery capable of the long term usage and having the high sealability by providing an electrolyte filler hole at the bottom part of a battery vessel, pressing-in a sealing plug after the filling of the electrolyte, covering the opening part with a metallic sealing plate, and welding its outer peripheral part. CONSTITUTION:A cylindrical or taper tubelous electrolyte filler hole 12 is provided at the center of a bottom part 5a of a battery vessel 5, after the filling of the electrolyte, a sealing plug 13 is pressed-in the electrolyte filler hole 12. Under the condition that the electrolyte filler hole 12 is sealed by the sealing plug 13, the welding of the outer peripheral part of the sealing plate 14 to the bottom part 5a of the battery vessel 5 is performed. Thereby, at the time of welding of the outer peripheral part of the sealing plate 14 to the bottom part 5a of the battery vessel 5, the vaporized material is not leaked out to the part to be welded, and the secure welding without a pin hole can be performed so as to perfectly seal the electrolyte filler hole 12, and the battery having the high sealability can be thus obtained. |
