| 摘要 |
PROBLEM TO BE SOLVED: To provide a button type air-zinc battery enhancing leak preventive characteristics when it is stored for a long period. SOLUTION: The button type air-zinc battery has a cup-shaped positive electrode can serving also as a positive electrode current collector, a positive electrode catalyst layer, a cap-shaped negative electrode current collector with folded ends, a negative electrode working material, and a ring-shaped gasket. The outside diameter A of the portion of the battery where the catalyst layer is located, the outside diameter B of the battery at the lowermost end position of the negative electrode current collector, the outside diameter C of the negative electrode current collector at the end folding position of the negative electrode current collector, the outside diameter D of the negative electrode current collector at the folded end position of the negative electrode current collector, the wall thickness m of the gasket at the C position, and the wall thickness n of the gasket at the D position meet the relationships: A>B; C>D; and m=n. The leak preventive characteristic of the battery can thus be enhanced without causing deflection of the positive electrode catalyst layer. The battery can be manufactured by sealing it using a crimper shaped so that a portion below a round part R corresponding to a calked part is tapered or rounded, and so that the inside diameter of its middle part is smaller than the inside diameter of its lower end part. |
