| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary battery having a structure that prevents contraction of a separator when heat is generated abnormally, and is difficult to collect gas between the separators.SOLUTION: A secondary battery includes a core formed by laminating a positive electrode and a negative electrode with a separator, having a first side and a second side located on the opposite side, interposed therebetween. The separator has a bonding region bonded intermittently so that an adhesive part and a non-adhesive part are formed alternately for at least one of separators adjacent in the lamination direction. The bonding region includes a first bonding region where the first sides are bonded intermittently, and a second bonding region where the second sides are bonded intermittently. |
