| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a square type buttery stabilizing a welding quality that is safe and highly reliable. <P>SOLUTION: An abutting region of a sheath can and a seal plate is joined by an energy irradiation process for drawing a nearly rectangular pattern by using an energy beam. In the energy irradiation process, a drawing starts from a start point positioned on a shorter side or a longer side of the rectangle, continues along the abutting region to go around the circumference once, passes at least one of the corner parts, and ends at an end point positioned on the short side or the longer side of the rectangle. <P>COPYRIGHT: (C)2004,JPO</p> |
