| 摘要 |
In a method for producing a sealed battery including irradiating a fitting portion between an outer can made of an aluminum-based metal and a sealing plate made of an aluminum-based metal and placed on a mouth portion of the outer can with a laser beam from continuous wave (CW) laser welding equipment for welding and sealing, the laser beam is output for scanning while pulse-modulating the output power of the laser beam in a welding start region, and then the laser beam is output for scanning at a constant output power. The present invention provides a method for producing a sealed battery by which welding start and stop regions are stably welded when an outer can and a sealing plate both of which are made of an aluminum-based metal are welded and sealed by a CW laser beam.
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