| 摘要 |
PROBLEM TO BE SOLVED: To improve degradation f liquid leakage resistance and capacity retention as well as to solve a problem of a creep phenomenon in an alkaline battery not using mercury. SOLUTION: With the alkaline battery sealing a positive electrode can 1 with a positive electrode complex agent 4 arranged with silver oxide or manganese dioxide as a positive electrode active material and a negative electrode cup 3 with a negative electrode complex agent 6 arrange with zinc or zinc alloy powder as a negative electrode active material, with an opening end edge having a turn-up part 13b and a turn-up bottom part 13a in cross section U-shape along its outer periphery face and with its inner face made of copper 33 through a gasket 20 and at the same time with a separator arranged between the positive electrode complex agent 4 and the negative electrode complex agent 6 and with an alkaline electrolyte solution injected, a film is formed 34 of a metal or an alloy with higher hydrogen overpotential than the copper in an inner region of the negative electrode cup 3 not including the turn-up part 13b and turn-up bottom part 13a, and at the same time, the tip of the gasket 20 is so made to come in contact with the inner face of the negative electrode cup 3. COPYRIGHT: (C)2003,JPO |
