| 摘要 |
PURPOSE:To retard an increase in the internal pressure of a battery in quick charge and prevent a drop in discharge voltage by forming a conductive layer on one side of a negative electrode, and facing the conductive layer to a positive electrode, then spirally winding them. CONSTITUTION:A positive electrode 2 and a negative electrode 1 are spirally wound via a separator 3. A conductive layer is formed on one side of the negative electrode 1, and faced to the positive electrode, then they are spirally wound. By this construction, the absorption capacity of oxygen gas evolved from the positive electrode is increased. The diffusion of an electrolyte in high rate discharge at low temperature is sufficiently conducted from the side, on which no conductive layer is formed, of the negative electrode. Therefore, a drop in performance in this discharge condition can be prevented. |
