| 摘要 |
<P>PROBLEM TO BE SOLVED: To inhibit the occurence of defects due to an electrolytic solution remaining near an opening, thereby achieving high quality and high reliability of a secondary battery. <P>SOLUTION: A secondary battery comprises: a container; a heat input part 8; and a lid. The container has a wall part provided with an opening and houses an electrode body and an electrolytic solution. The heat input part comprises portions, provided on an outer surface of the wall surface along an edge of the opening and arranged in a direction that moves away from the opening, and is provided on the wall part. The lid is fixed to the wall part overlapping with the heat input part and closes the opening. The heat input part has: first portions 8c enclosing the opening; and a second portion 8d which encloses the opening at a position close to the edge compared to the first portions, the heat input being deeper than that of the first portion in the second portion 8d. <P>COPYRIGHT: (C)2013,JPO&INPIT |
