| 摘要 |
PURPOSE:To improve the liquid leak-proof property of the captioned battery, by installing a film which is as soft as or softer than a gasket on the surface touching the gasket of a negative electrode can. CONSTITUTION:A film 7 which is softer than a gasket 2, for instance, a film composed of tetrafluoroethylene is installed on the contact surface between a negative electrode can 1 and the gasket 2. This film 7 is formed by spraying its material to the negative electrode can 1, thereafter the material is burnt and hardened at that position, so that the resin never flows out even if under such conditions that the gasket 2 is pressed and supported between a positive electrode can 6 and the negative electrode can 1; consequently, an uniform tightening force can be maintained over the entire surfaces of the film 7 and the negative electrode can 1. |
