| 摘要 |
PROBLEM TO BE SOLVED: To restrict the energy loss in a core material, and improve the output characteristic by using an electrode, which is obtained by filling or coating a porous body with the active material, as a core material, and fitting a tab, to which a collector is to be welded, to an end of the electrode, and forming a large diameter holes of the porous body flat in the horizontal direction in relation to the collector. SOLUTION: As a core material 2 of a positive electrode 1, a foaming nickel porous body, which has elliptic holes and of which long holes are aligned in the horizontal direction, is used. After previously providing a pressurizing surface part, to which a collector 3 is to be welded, in an upper end, this core material 2 is filled with nickel hydride powder as the active material, which can be charged and discharged, and the core material 2 is rolled, and a collector 3 having a collecting part, which is formed at same width with the electrode width, is electrically connected to an upper edge of the core material 2 so as to form a positive electrode. Reaction of a terminal and a part near a collecting part of the electrode are evenly advanced, and the current distribution in the right and left direction of an upper part of the electrode is evened. With this structure, deterioration of the active material 4 is restricted, and lifetime of a battery can be prolonged. |
