| 摘要 |
PURPOSE:To obtain a battery with a lead body whose mechanical strength is large by making the thicker lead body than a welded section contact to the battery, irradiating the contact section with laser beam, and integratedly joining the lead body and the battery. CONSTITUTION:The thickness dimensions of a lead body 15 are set to 0.5mm. larger than the welded section of a battery, for example, the thickness dimensions of a battery container 1 and recesses 17 and 18 that prevent the reflection of laser beam from the surface of the corresponding lead body 15 are perforated on a lower surface 16. Then after the lead body 15 is made to contact to the lower part of the battery container 1 that corresponds to a negative electrode 2 made of lithic metals, the contact section between the battery container 1 and lead body 15, that is, the recesses 17 and 18 of the lead body 15 are irradiated with laser beam, for example, CO2 laser beam 21 with the 850W output through a lens 20 for 0.1sec and the lead body 15 and the battery container 1 are joined at the two locations that correspond to the recesses 17 and 18. |
