| 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 core material, and forming large diameter holes of the porous body in the vertical direction in relation to the collector. SOLUTION: As a core material 2 of a positive electrode 1, a foaming nickel porous body having elliptic holes, of which major diameters are aligned in the vertical direction, is used. After previously providing a pressurizing surface part, to which a collector 3 is to be welded, this core material 2 is filled with nickel hydride powder as the active material 4, which can be charged and discharged, and the core material 2 is rolled, and the collector 3 having a collecting part, which is formed in the same width with the electrode width, is electrically connected to an upper edge of the core material so as to manufacture a positive electrode. Voltage lowering in the vertical direction inside an electrode is reduced by using this electrode, and power is efficiently collected to an upper part of the electrode, and furthermore, the contact area of the upper part of the electrode with the collector is enlarged. With this structure, voltage lowering is reduced, and the output characteristic is improved. |
