| 摘要 |
PURPOSE:To eliminate defective welding thus to improve the enclosing performance by temporarily sealing the cell cover and the cell case to stop leakage of electrolyte to the welding section thereafter sealing the cell case and the cell cover through welding. CONSTITUTION:A cell cover 2 is placed upside down to contain an insulator 7, a negative electrode 6, a separator 6, majority of electrolyte and a positive electrode 4 in this order then the remaining electrolyte is injected onto the positive electrode 4 to apply a cell case 1 from above. The open end section 1a of the cell case 1 is fastened inwardly to caulk a gasket 3 fitted over the outercircumferential edge section 2a1 of the cell cover 2 thus to pressure contact against the cell cover 2 and the cell case 1 and to seal temporarily, while the open end section 1a of the cell case 1 is contacted against the shoulder section of the outercircumferential edge section 2a1 of the body 2a of the cell cover 2 and to raser weld the contacting section between the cell case 1 and the cell cover 2. Consequently, the electrolyte will never leak to the welding section to enable reliable welding of cell cover 2 and cell case 1. |
