| 摘要 |
PROBLEM TO BE SOLVED: To provide a flat battery advantageous for achieving high capacity while ensuring sealing capability. SOLUTION: The flat battery 1 is formed by sealing the opening of an outer can 2 with a sealing can 3, the outer can 2 and the sealing can 3 have a cylindrical shape formed by standing the surrounding wall in the periphery of a bottom and opening one end, the tip 12a of a surrounding wall 12 of the outer can 2 is bent toward the center axis 9 of the outer can 3, the outer can 2 is crimped to the sealing can 3, a surrounding wall 16 of the sealing can 3 is a single wall having no turning up part in the cross section shape in the center axis 9 direction of the sealing can 3, a surrounding wall 16 of the sealing can 3 has a straight line part 17 connecting to the bottom 15 through a corner part 18, and the Vickers hardness of the straight part 17 is larger than that of the corner part 18. COPYRIGHT: (C)2010,JPO&INPIT |
