| 摘要 |
A method for manufacturing an alkaline battery in coin shape and button shape is provided. In a method in which the inside surface of the negative electrode cup 4 of an alkaline battery having a positive active material of silver oxide or manganese dioxide, a negative active material of zinc or zinc alloy without containing mercury, a separator and a gasket provided between positive electrode mixture and negative electrode mixture, and alkaline electrolyte injected, is coated with metal or metal alloy having a higher hydrogen overpotential than copper, the mask 11 used for coating processing has the shape in which: when d is the diameter of the negative electrode cup, t is the plate thickness of the negative electrode cup, A is the diameter of the mask opening on the negative electrode cup mounting side, B is the diameter of the mask opening on the negative electrode cup supplying side, h is the depth of the negative electrode cup, C is the thickness of mask on negative electrode cup mounting side, and D is a tapered angle of the mask opening on the negative electrode cup, 2(2t+d)-B>A ‰§0.7d, (A/2)-h‰§C>0mm, and 90°>D‰§45° are satisfied to coat only the inside surface area except a cuff portion 4a and cuff bottom portion 4b of the negative electrode cup 4. |
