| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery capable of preventing cut off of an electrode plate core in the boundary part between the outermost circumferential electrode plate core and adhesive tape even if the flat spiral electrode group is formed by applying high pressure by sticking a rolling stop tape in the outermost circumference of the flat spiral electrode group and optimizing the sticking position. SOLUTION: In an electrode plate 11 arranged in the outermost circumference of the spiral electrode group 10, the inner circumferential side has a both surface coated part coated with an active material on both surfaces of a core 11a, the outer circumferential side continuing to the both surface coated part has one surface core exposed part 11c in which only the one surface of the core on the inner surface is coated with the active material and the core of the outer surface is exposed, the outermost circumferential side continuing to the one surface core exposed part 11c has a both surface core exposed part 11d where the both surfaces of the core are not coated with the active material, one end of a rolling stop tape is stuck to the both surface core exposed part 11d in a curvature part (a round part) of a flat spiral electrode group 10, and the other end of the rolling stop tape is stuck to the one surface core exposed part 11c in a curvature part (a round part) of the flat spiral electrode group 10. COPYRIGHT: (C)2007,JPO&INPIT |
