| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a battery causing no crack or no rupture in an electrode on the outermost periphery of the battery even if the battery falls, by preventing an adhesive material from overflowing from the end part of an adhesive tape when inserting an electrode group in a case can, in order to prevent the external surface of the electrode group from being bonded to the inner wall of the case can. <P>SOLUTION: This battery is equipped with the spiral electrode group 10A formed by winding a positive electrode in which a positive electrode core body of metal foil is coated with a positive electrode active material and a negative electrode in which a negative electrode core body is coated with a negative electrode active material through a separator so that they face each other. In this spiral electrode group 10A, a core body exposing part 12b where the active material is not coated is formed on the surface of its outermost periphery, adhesive tapes 31a, 32a, 33a are pasted to the core body exposing part 12b, and non-coated parts x, y where adhesive material β is not applied is formed on the peripheral rim parts of the adhesive tapes 31a, 32a, 33a. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
