| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing a sealed battery, sealing a metal plate covering a plug for closing an electrolyte pouring hole installed in the battery by welding with high energy beams such as laser beams in a short time, and forming an irradiation mark for discriminating a manufacturing history. SOLUTION: In the method of manufacturing the sealed battery sealing the electrolyte pouring hole by closing the electrolyte pouring hole installed in the battery with the plug, and welding at least two portions 32, 33 in the periphery of the metal plate 29 part covering the plug to a sealing cover with high energy beams, the irradiation mark 36 for discrimination is formed with the high energy beams during relative moving of a working head from a welding finishing point of a first welding portion 34 with the high energy beams to a welding starting point of a second welding portion 35. COPYRIGHT: (C)2007,JPO&INPIT
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