| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylinder-shaped alkali storage battery prevented from increase of inner pressure at charging, suitable for increasing its capacity, having a good high-rate discharge property. SOLUTION: The cylinder-shaped alkali storage battery comprises a cylinder-shaped conductive outer case and an electrode group housed in the outer case together with alkaline electrolyte. The electrode group is formed by winding a negative electrode 26 and a positive electrode through a separator in a swirl-shape so as to locate the negative electrode 26 at an outermost periphery, and the outermost periphery composed of the negative electrode 26 is made to contact the inner wall of the outer case. The negative electrode includes a belt-shaped negative electrode core body 46 and activator layers 48, 50 held on the negative electrode core body 46. Further, the negative electrode 26 is composed of a main body part 52 wound at the inside of the electrode group and a thin thickness part 56 wound as an outermost part of the electrode group, of which the thickness of the activator layer 50 is thinner than that of the main body part 52. The activator layer 48, 50 of the main body part 52 has water repellent layers 58 on its surface. COPYRIGHT: (C)2005,JPO&NCIPI
|
