| 摘要 |
PURPOSE:To restrain the deterioration of a negative electrode and obtain a secondary battery with a long cycle life by laminating the negative electrode or a positive electrode with a shape memorizing alloy. CONSTITUTION:A negative electrode 1 is laminated with a shape memorizing alloy 2 at both sides and wound together with a separator 3 impregnated with nonaqueous electrolyte and a positive electrode 4, and a negative electrode terminal 5 and a positive electrode terminal 6 are formed at respective poles. In the shape memorizing alloy 2, a winding condition is previously memorized at a smaller curvature than in a battery assembling condition. As a result, the negative electrode 1 is always subjected to pressure even if changed in volume or shape. It is thus possible to restrain the deterioration of the negative electrode and obtain a secondary battery with a long cycle life. |
