METHOD OF MANUFACTURING SQUARE SEALED STORAGE BATTERY

PROBLEM TO BE SOLVED: To provide a square sealed storage battery with high sealing ability by solving problems such as unstable welding or low sealing ability in the square sealed storage battery using aluminum in a battery case and a cover plate. SOLUTION: The square sealed storage battery is manufactured in such a way that aluminum is used in the battery case and the cover plate sealing an opening part of the battery case, an electrolyte is poured from an electrolyte pouring hole for pouring the electrolyte formed in the cover plate or the battery case, a sealing plug is inserted into the electrolyte pouring hole, the sealing plug is integrally sealed with the cover plate or the battery case by laser welding, and welding is performed in a condition that an output is 50-300W, a laser beam diameter is 0.3-1 mm, and a moving velocity is 1 mm/sec to 15 mm/sec. COPYRIGHT: (C)2005,JPO&NCIPI