| 摘要 |
PURPOSE:To enable firm welding to be achieved with small welding voltage and current by welding the upwardly protruding area of a spiral plate group along which a core metal is exposed to the radially extending convex sections of a current collector which has a flat outer surface. CONSTITUTION:After the separator is placed between the belt-like positive and negative plates each of which has an unsealed long side along which a core metal is exposed in such a manner as to protrude the unsealed long sides from the upper and the lower sides, the thus formed body is rolled into a spiral form to make a plate group 6. A current collector is prepared by forming several radially extending convex sections 4 having sharp edges on the back surface of a disk-like member 2 which has a liquid pouring hole 1 and a lead tab 3. An alkaline storage battery is constituted by welding the convex sections 4 of the current collector to the upwardly protruding area of the plate group 6 along which the core metal is exposed. By the means mentioned above, sufficient structural strength can be achieved by welding with reduced voltage and current thereby improving the reliability of the battery. |
