| 摘要 |
<p>The present invention aims at providing a laminated secondary battery in which no short circuit occurs even if an electrode sheet is not covered with an insulating resin. The present invention provides a laminated secondary battery in which positive electrode sheet 21 and a negative electrode sheet are stacked one on the other to face each other with separator 26 interposed therebetween, in which positive electrode sheet 21 or negative electrode sheet or both positive electrode sheet 21 and negative electrode sheet has/have fusion bonded portions 24 fused at intervals along a periphery of positive electrode sheet 21 or the negative electrode sheet, fusion seal portion 25 continuously fused along an inner periphery or an outer periphery of fusion bonded portions 24 or between adjacent fusion bonded portions 24, and separator protrusion portion 28, and the length (L1) of separator protrusion portion 28 satisfies the formula: L1 ‰¥ L2 x C, wherein L2 denotes the dimension of separator 26 in the longitudinal direction except for the length of separator protrusion portion 28, and C denotes the heat shrinkage factor of separator 26 in the longitudinal direction.</p> |
