| 摘要 |
<P>PROBLEM TO BE SOLVED: To structurally prevent the heat generation of a battery when mechanical pressure is applied to the battery toward the inside of the battery, in a nonaqueous secondary battery composed by housing, in an armoring case, an electrode body formed by spirally rolling, by interposing a separator, a positive electrode formed by applying positive electrode active materials to both surfaces of at least a part of a strip-like positive electrode collector, and a negative electrode formed by applying negative electrode active materials to both surfaces of at least a part of a strip-like negative electrode collector and by applying the negative electrode active material on one-side surface of the at least a part continuously to the negative electrode active material both-surface application layers. <P>SOLUTION: This lithium ion secondary battery is so structured that ends of the negative electrode active material both-surface application layers and the end of the negative electrode active material one-side-surface application layer arranged at the peripheral part of the negative electrode 6 in an electrode body A having a rolled structure are so arranged that a relative angle with respect to the center point of the electrode body A at each region is set not smaller than 5° on a cross section of the electrode body A. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
