MANUFACTURE OF SEALED BATTERY

摘要

PURPOSE: To provide the manufacture of a sealed battery with no possibility of welding failure when a cover plate is laser-welded at the upper opening end of a bottomed can. CONSTITUTION: A hole 5a is made in the center of the upper opening end 1a of a bottomed can 1 in which a plate group 3 is stored, a rivet 8 connected to the plate group fits a cover plate 5 mounted in the hole 5a via an insulating packing material 7. and a fitting portion 6 between the bottomed can 1 and the cover plate 5 is welded with air tightness. After alkali electrolyte is filled through a hole 8a in the rivet, the hole 8a is closed with a safety valve 9 and a cap 10 with a gas escape hole is capped thereon and the rivet 8 is laser-spot- welded at the cap 10.