| 摘要 |
PURPOSE:To raise the resistance to leak of liquid by providing a great number of fine holes of a specific size on the copper surface in contact with the gasket of a negative electrode current collector. CONSTITUTION:The positive electrode can 5 is housed with a positive mixture of argentous oxide, etc., and its upside is provided with the separator 2 and further with the negative electrode agent 4 of zinc, filled in the negative terminal plate 6 as a negative electrode current collector. And, the negative terminal plate 6 is fitted through the ring gasket 7 into the aperture of the positive electrode can 5 to form a button-type sealed cell. The negative terminal plate 6 is made up of a clad plate manfactured by providing the nickel layer 9 and the copper or copper alloy layer 10 on the surface of the steel plate 8, for example, and the surface 12 at which the gasket 7 of the copper or copper layer 10 is presure-welded is provided with a great number of the fine holes of a 1-6 mu-thick concaved shape. Furthermore, the surface 12 is preferably provided with the film 14 composed primarily of a benzotriazolic compound. |
