PURPOSE: To provide a battery of a cubic form without any waste in energy charging efficiency per volume, by arranging respective positive/negative electrodes formed in a belt shape, in such a manner that mutually different electrodes may be opposed to each other on one-side electrode so as to form an electrode body by bending and folding them.
CONSTITUTION: Firstly, electrodes A1, B2 are produced. Foils of respective current collector bodies 11, 21 of A electrode 1 or B electrode 2 formed in a belt-like shape are prepared. Active substances 12, 22 facing to A/B electrodes respectively are applied to respective current collector bodies 11, 21 in film-like shape. Then, separators 3 are set on both surfaces of either one of electrodes A and B. Bending and folding directions of respective electrodes A and B are made perpendicular to each other so as to align the end parts of respective electrodes, and by stacking respective electrodes as bending and folding, an electric electrode body of laminated structure in which respective electric electrodes are opposed to each other without fail may be obtained. This electric electrode body is received in a package, and leads are drawn out from current collectors 12, 21 of respective electrodes to be made the electrodes of the battery. Then, electrolytic liquid is filled therein and the package is tightly sealed to obtain the battery.
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YAMADA TAKASHI
TSUJI HIROSHI
MATSUI FUMIO
