| 摘要 |
PROBLEM TO BE SOLVED: To improve productivity and to enable compacting of storage and high durability, by composing by bending and piling a laminated or composite film with a side facing to the side on the electrode terminal draw-out side of a battery element as a bent-up side and loading the battery element interposedly, and by melting and sealing three sides of the laminated or composite film and bending the edge parts of two sides perpendicular to the bent-up side in the lateral direction. SOLUTION: In coating of a cell element, a laminated or composite film 11 is bent at the center part and the battery element is loaded between the upper side and lower side film, and the upper side and lower side film are piled and arranged so that collectors (lead wire connecting terminals) 5a, 5b are projected on the side facing to the bent-up side, and melted and sealed. Melted and sealed parts 13b, 13c of two sides perpendicular to the bent-up side, of the laminated or composite film 11 with three sides melted and sealed respectively, are bent to the same side in the lateral direction, to thereby form a secondary battery. A storing area of battery can be reduced by bending of the melted and sealed parts 13b, 13c, and the connection state with an adjacent battery can be formed by the melted and sealed parts 13b, 13c, to thereby enable to pile the battery stably. |
