| 摘要 |
PROBLEM TO BE SOLVED: To improve welding strength in a fitting part between a sheath can and a sealing plate using high energy beams with the same strength. SOLUTION: This method is used for manufacturing a sealed battery formed by fitting the sealing plate into an opening of the sheath can, and then by welding the fitting part with the high energy beams. By using metal of which the thermal conductivity is smaller than that of metal as the main material constituting a sealing plate body, a dissimilar metal part extending along the thickness direction of the sealing plate is provided using a region, which is at least 0.1 mm inside from a peripheral edge outer surface of the sealing plate, as the upper end, and after the sealing plate is fitted into the opening of the sheath can, the fitting part is welded by irradiating the high energy beams to the fitting part. COPYRIGHT: (C)2009,JPO&INPIT
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