| 摘要 |
PROBLEM TO BE SOLVED: To provide a reliable nonaqueous electrolyte secondary battery arranged so as to properly suppress the shrinkage of a separator under a high-temperature environment.SOLUTION: A nonaqueous electrolyte secondary battery of the present invention comprises: a flat wound electrode body arranged by superposing an elongated positive electrode, an elongated negative electrode, and an elongated separator 70 for electrical isolation between the positive and negative electrodes on one another and winding them in a longitudinal direction; and a nonaqueous electrolyte. The separator 70 has: a base material layer 90 made of a resin base material; and a heat-resistant layer 80 formed on one face of the base material layer 90. The adhesion strength of the base material layer 90 and the heat-resistant layer 80 is 0.19-400 N/10 mm.SELECTED DRAWING: Figure 1 |
