| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithium ion battery which secures safety although having a high capacity and output. <P>SOLUTION: In the lithium ion battery, an electrode plate group wherein a positive electrode plate in which an aluminum foil is coated with lithium manganate, and a negative electrode plate in which a rolled copper foil is coated with an amorphous carbon are wound with a porous separator interposed therebetween, is immersed in a nonaqueous electrolyte, and housed in a battery container. At the winding center of the electrode plate group, an axis core is disposed. To the lower end of the axis core, a negative electrode current collector ring is fixed. The negative electrode current collector ring is welded to the inner bottom of the battery container through a negative electrode lead plate. The axis core, the negative electrode current collector ring and the negative electrode lead plate are made of copper of the same material. The deviation of the temperature distribution of the whole electrode plate group is reduced by the heat conduction between the axis core, the negative electrode current collector ring and the negative electrode lead plate, whereby the porous separator is uniformly shut down. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
