| 摘要 |
PROBLEM TO BE SOLVED: To reduce weight without decreasing battery capacity by forming a battery container storing and sealing a positive electrode, a negative electrode, and electrolyte as a compact containing organic high molecular material, as a component material, where the lowest of a softening point, a melting point, and a thermal decomposition temperature is not less than 100 deg.C. SOLUTION: This nonaqueous electrolyte secondary battery is formed by storing a spiral electrode comprising a spiral-type winding body of a layered product of a strip negative electrode 1, a separator 3, a strip positive electrode 2, a separator 3 in a battery container 5, injecting liquid electrolyte, providing a safety valve device 6 over the spiral electrode, and covering a battery lid 7 over it. An organic high molecular material forming the battery container 5 has chemical stability to compound constructing the electrolyte and a mechanical strength enough to keep a battery configuration, and is not decomposed, softened, and melted at 100 deg.C, especially as thermal stability. Specifically, polyethylene, polypropylene, polytetrafluoroethylene, polycarbonate, phenol resin, polyimide or the like is used. |
