| 摘要 |
PROBLEM TO BE SOLVED: To prevent a lead terminal from being cut by a movement of an unit cell due to impact and vibration by improving a lead terminal having its tip extracted outside a case, in a flat battery having a laminated sheet mainly of a resin film for an armored case. SOLUTION: An almost S-shaped bent part comprising a first folded part folded back toward the base of a terminal part in connection with a welded part and a second folded part folded back again in the extracting direction of a lead in the vicinity of the base of the terminal part is provided at a lead terminal with each end welded to the positive and negative electrode terminals of an unit cell 4 formed by integrally laminating the positive electrode 1, a separator 3 and the negative electrode 2, and the lead terminal is prevented from being cut by absorbing and eliminating a stress caused by a movement of the unit due to the bending and stretching deformation of the almost S-shaped bent part. |
