| 摘要 |
PURPOSE: To prevent a flat alkaline battery from generating its deterioration due to hydrogen gas generation even if it has been stored for a long period by setting a Ni-plated material-made reinforcing ring on the circumferential part of positive electrode activating substance formed by pressurization in pellet-like shape disc-dice. CONSTITUTION: A power generating element formed by stacking positive electrode activating substance 2, a separator 3 and negative electrode activating substance 4 is received in a flat positive pole can 1. Further, a dish-like negative pole terminal plate 5 is fitted to the inside of the opening part of the positive electrode can 1 through an opening-sealing annular gasket 6. Furthermore, a battery case is tightly sealed by curl-shaping the opening edge of the positive electrode can 1 to the inside. The positive can 1 is made of a nickel plated steel plate, the positive electrode activating substance 2 is such on as being obtained by mixing a small amount of graphite in Mn dioxide, and the separator 3 is made of poly-propylene non-woven cloth, etc., the negative pole activating substance 4 is such one as being kneaded by adding thereto an alkaline solution and gelling agent such as CMC to Zn powder and the opening sealing gasket 6 is a formed product of polyethylene and like. Positive electrode activating substance 2 is formed in pellet-like shape disc-dice and a nickel-plated reinforcing ring 7 is set to the circumferential edge part. |
