| 摘要 |
PURPOSE:To improve leak resistance of liquid in an enclosed cell of button type or flat type. CONSTITUTION:An upper internal surface above an upper level part (point A in the drawing) of a gasket supporting bed seat 4 provided between a positive pole active material 5 and positive pole vessel 1 is formed to a rough surface as shown by the numeral 10. In this way, a part of the rough surface 10 is rooted in a corresponding outer surface of a gasket 3, when the gasket is compressively tightened, to both prevent an escape of the gasket and enable to press the gasket under a condition along internally folded deformation of the vessel 1. Accordingly, an upper part of the gasket 3 is closed filled under a condition 3'' in a space formed by the vessel 1 and a negative pole vessel 2. As a result, leak resistance of a cell can be improved. |
