| 摘要 |
PURPOSE:To increase current collecting efficiency by welding metal plates comprising slender nickel plate or nickel plated steel plate to the upper end of a positive substrate obtained by making a nonwoven fabric with nickel fibers produced by chatter vibration cutting method and sintering. CONSTITUTION:Nickel fibers produced by chatter vibration cutting method are formed in a nonwoven fabric, then sintered to obtain a substrate. Metal plates comprising slender nickel plate or nickel plated steel are fixed to the upper end of the substrate at regular intervals by spot welding or surface welding. A paste-like active material is filled in the substrate, dried, then pressed to control the thickness to obtain a paste type positive electrode. A current collecting lug is welded to the positive electrode or a disk-like current collector is welded to a plate group obtained by winding the positive electrode, a separator, and a negative electrode. Fixing of the current collecting lug or the disk-like current collector is made esy, and current collecting efficiency of the positive electrode is increased. Therefore, good charge-discharge efficiency can be obtained. |
