| 摘要 |
PURPOSE:To prevent from breaking a separator by a core body even though an external force brings a remarkable to a cell, by using a heat-resisting resin film with an electron conductive layer formed on its surface as the core body. CONSTITUTION:A manganese dioxide positive electrode plate 10 and a lithium negative electrode 12 both with a core body 11 are wound through a separator 13 to form a spiral electrode body. As a core body 11, a resin film 11a consisting of polyimide with electron conductive layers 11b over the both surfaces is used. Since the core body 11 has a good extending property by using the resin film 11a as its base, an external force can hardly cut off the core body 11, and even though the core body 11 is cut off, the separator 13 shall not be broken by the cut off top. Furthermore, even though the separator 13 is broken by some other cause and the core body 11 contacts the opposite electrode, a permanent contacting condition can be avoided. |
