| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery with excellent safety, without generating liquid leakage and expansion maintaining the electric performance of a film package nonaqueous electrolyte battery. SOLUTION: Electrolyte amount is sat 3 to 7g per unit discharge capacity (Ah), lithium tetrafluoroborate is used as a lithium salt sand the density of lithium salt is set 1.5 to 4M. In the film package battery 10, a power generation element 1, a positive terminal 2, a negative terminal 3 and external exposing parts 2A and 3A of each terminal 2 and 3 are air-tightly sealed by a composite film 5 laminating resin layers on one surface or both surfaces of aluminum foil of a core material. |
