| abstract |
According to the present invention, in a nonaqueous electrolyte battery in which a cell is accommodated in a packaging material made of a laminate film and heat-sealed, the moisture permeation amount at the thickness T (µm) of the heat-sealing resin layer that is the innermost layer of the packaging material is R (g / M 2 · day), when the resin cross-sectional area of the heat seal portion is S (cm 2), the average width of the heat seal portion is W (cm), and the capacity of the cell is C (Wh), (T × R × S) / ( WxC) is 0.96 µg / Wh · day or less. By setting in this way, the penetration | invasion rate of water will be 350 (microgram / year) or less per capacity (Wh). |