| 摘要 |
PROBLEM TO BE SOLVED: To ensure liquid tightness between a connected part and a separator and to suppress generation of pores and cracks within the connected part by pushing out and butting connecting bodies faced on the opposite sides of a through hole installed in the separator and supplying power after pressing force is reduced. SOLUTION: A through hole 1a corresponding to lead-alloy connecting bodies 2, 2' for connecting cells is installed in an intercell separator 1. The connecting bodies 2, 2' are pressed with pressing and power supplying electrodes 3, 3' by a first pressing force, and are pushed out into the through hole 1a to be abutted against each other. After that, pressing force is reduced to a second pressing force lower than the first pressing force, the connecting bodies 2, 2' are pressed again by a third pressing force lower than the first pressing force and higher than the second pressing force. In the state of keeping the third pressing force, power is supplied across the connecting bodies 2, 2', the connecting bodies 2, 2' are heated by contact resistance between them and welded. Pressing force is increased while a welded part 4 is melted to a fourth pressing force, and the welding part 4 is cooled and solidified to obtain an intercell connecting part.
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