| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive, highly reliable flat battery which meets both a demand for maintenance of fine and secure sealing in a normal condition and a demand for inner pressure release under a low vent working pressure. SOLUTION: The flat battery includes a battery container 2 containing power-generating elements. The battery container 2 is composed of an outer sheath can 6 that is formed into a flat, round table shape by bending a peripheral wall 5 upward from the peripheral edge of a bottom wall 3, and a sealing can 10 that is formed into a round, flat plate shape by bending a peripheral wall 9 downward from the peripheral edge of an upper wall 7. These outer sheath can 6 and the sealing can 10 are sealed together by caulking via a gasket 11 located between the peripheral wall 5 and the peripheral wall 9 of the outer sheath can and the sealing can. The opening upper end 5a of the peripheral wall 5 of the outer sheath can 6 is formed to have a plate thickness smaller than that of the sealing can 10. COPYRIGHT: (C)2010,JPO&INPIT |
