| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery in which temperature unevenness of a positive electrode coated part can be reduced, and increase in the internal resistance of the battery can be reduced, by reducing the temperature difference between the width direction center part and the width direction end part of the positive electrode coated part. <P>SOLUTION: A nonaqueous electrolyte secondary battery 100 comprises an electrode body 110 obtained by winding a stripe-shaped positive electrode 130, negative electrode 120, and a separator 150. The positive electrode 130 has a stripe-shaped positive electrode collector member 138, a stripe-shaped positive electrode mixture layer 131, and a stripe-shaped intermediate layer 139 interposed between the positive electrode collector member 138 and the positive electrode mixture layer 131. The intermediate layer 139 has a heat conductivity higher than that of the positive electrode collector member 138, and is disposed in a region facing a part 131d in the width direction of the positive electrode mixture layer 131 including the width direction center part 131b of the positive electrode mixture layer 131. <P>COPYRIGHT: (C)2013,JPO&INPIT |
