| 摘要 |
PURPOSE:To improve strength and leakage proof by making a positive electrode can of a material having little spring back and subjecting either of the inside wall or the outside wall at the bottom of the positive electrode can to reinforcing plating. CONSTITUTION:A positive electrode black mix layer 2 is inserted in a positive electrode can 1 and a separator 3 is put on it. A negative electrode can 5 filled with negative electrode agent 4 is fitted in an opening of the positive electrode can through a gasket of L-letter shaped cross-section. Then, the positive electrode can is air-tightly sealed, to form a button shape alkaline battery. The positive electrode can is made of a material of little spring back, for example nickel material, and either or both of the inside wall and the outside wall at the bottom 1a of the can is plated 1c for reinforcement. This plating 1c is preferably effected by hard nickel, namely a material with aging effect and hardened by heat treatment. It is desirable that the Vickers' hardness is more than 400 and its thickness is more than one second of the bottom 1a of the material. |
