| 摘要 |
PROBLEM TO BE SOLVED: To provide a thin type pouch battery used as a driving force for portable electronic equipment, a portable electronic terminal or the like with such flexibility that neither wrinkle nor crack occurs in the outer package of a laminate film even when the thin type pouch battery is bent upwards or downwards from any direction, thereby enhancing the quality and reliability of the battery.SOLUTION: Projecting bulge portions 115, 116 in which an electrode group is inserted are formed on an upper laminate film outer package 101 and a lower laminate film outer package 102, respectively. Thereafter, concentrically uneven corrugations (concentric mountain-like ridge lines or valley-like ridge lines 111) are formed on the top surfaces of the projecting bulge portions 115, 116 so as to be capable of expanding and contracting in any direction. The side surfaces 113 of the projecting bulge portions are configured as smooth slope surfaces, and corrugations are formed on the side surfaces 113 of the projecting bulge portions.SELECTED DRAWING: Figure 13 |
