| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly reliable secondary battery in which deformation of an insulation member is prevented when a connection terminal and an external terminal plate are welded.SOLUTION: Disclosed is a secondary battery comprising: a wound electrode group; a battery case; a battery lid; terminal members 104, 105 fixed to the battery lid; and a collector connecting the wound electrode group and the terminal members 104, 105. The terminal members 104, 105 include: an external terminal plates 141, 151 disposed on the battery lid via terminal blocks (insulation members) 160p, 160n; and connection terminals 145, 155 whose end parts are caulked to the external terminal plates 141, 151. The external terminal plates 141, 151 include mounts 143, 153 in a rectangular flat plate shape to which the connection terminals 145, 155 are caulked. The outer marginal parts of caulk parts 146s, 156s and the mounts 143, 153 are intermittently welded, avoiding areas in which the distance X, the distance from the outer marginal parts of the caulk parts 146s, 156s to side walls 163p, 163n of the terminal blocks 160p, 160n, becomes shortest. |
