| 摘要 |
PROBLEM TO BE SOLVED: To provide a light-weight and safety nonaqueous electrolyte secondary battery. SOLUTION: In a nonaqueous electrolyte secondary battery comprising a generating element in a bag-shaped unit battery case, a thickness of a collector lead connected to a negative electrode plate and a collector lead connected to a positive electrode plate is 50μm or more and 500μm or less, a width thereof is 2 mm or more, the collector lead connected to the positive electrode plate is made of a metal of 100 kcal/(m.hr. deg.C) or more of heat conductivity, and the collector lead connected to the negative electrode plate is made of a metal of 70 kcal/(m.hr. deg.C) or more of heat conductivity, or the collector lead connected to the regulative electrode plate is made of a metal of 70 kcal/(m.hr. deg.C) or more of heat conductivity, and the collector lead connected to the positive electrode plate is made of a metal of 100 kcal/(m.hr. deg.C) or more of heat conductivity. |
