COIN-SHAPED STORAGE CELL

摘要

Disclosed is a coin-shaped storage cell (1) comprising a pair of polarizable electrodes (17, 18), an insulating separator (21) interposed between the polarizable electrodes, an electrolyte solution (22) impregnated in the polarizable electrodes (17, 18) and the separator (21), a metal case (11) for housing the polarizable electrodes (17, 18), an insulating ring packing (15) arranged in the metal case, and a top lid (13) which is caulked integrally with the metal case (11) via the ring packing (15). The inner bottom surface of the metal case (11) is provided with recessed and projected portions.