| 摘要 |
PURPOSE:To prevent an internal short circuit and increase the welding strength of terminals by welding a lead terminal to a spare terminal made of a thin metal plate in advance and spot-welding the spare terminal to the outer surface side of a negative terminal plate filled with a lithium negative electrode. CONSTITUTION:A positive electrode 5 is stored in a positive electrode can 7 and is faced to a negative electrode 9 through a separator 8. The negative electrode 9 is constituted by inserting disk-like metal lithium and pressing it into contact with a negative electrode terminal plate 4. An electrolyte is filled inside the positive electrode can 7 and terminal plate 4 and they are sealed by an annular gasket 11. Then, the tip of a lead terminal 2 is compressed flat, and the flat portion is spot-welded to a spare terminal 1 made of a disk-like thin metal plate with a thickness of 0.01-0.2mm.. Next, the terminal 1 thus made is spot-welded to the surface of the terminal plate 4. And a lead terminal 13 is directly spot-welded to the outer surface of the positive electrode can 7. Accordingly, an internal short circuit of a cell can be prevented and the welding strength of lead wires can be increased. |
