| 摘要 |
PURPOSE:To provide a button type or coin type alkaline primary battery having high capacity and capable of high rate discharge and discharge at low temperature by using together a low density dispersed negative electrode obtained by dispersing zinc powder in an electrolyte which is made viscous by a thickening agent and a high density molded negative electrode obtained by molding zinc powder. CONSTITUTION:Figure (A) shows a negative construction obtained in such a way that a molded zinc negative electrode 7a which is previously press-molded is placed in a negative sealing plate 2, a mixture of zinc powder and thickening agent powder is placed thereon, then an electrolyte is poured to form a viscous dispersed negative electrode 7, or a gelled dispersed negative electrode 7 is placed thereon. Because the dispersed negative electrode 7 is faced to a positive electrode 4, this battery is excellent in high rate discharge and discharge at low temperature, and since the amount of zinc can be increased, the capacity in low rate discharge is increased. Figure (B) shows the construction that the dispersed negative electrode 7 is placed on the side of the negative sealing plate 2, and the molded negative electrode 7a is arranged on the side of the positive electrode 4. This battery has a large capacity in low rate discharge, and since the molded negative electrode 7a is in contact with the separator, storage performance is increased. |
