Rechargeable battery

Disclosed is a rechargeable battery according to an exemplary embodiment of the present invention which comprises an electrode assembly (10) having a first electrode (11), a second electrode (12), and a separator (13) interposed between the first and the second electrodes (12, 11); a case (15) for mounting the electrode assembly (10) therein; and a cap assembly (20, 40, 50, 60) comprising a cap plate (28, 42, 58) for closing an opening of the case (15). Further, a short member (43, 47, 52) is provided adapted to be deformed to short-circuit the first electrode (11) and the second electrode (12). In addition, at least one fuse portion (31a, 32a, 67) is provided being electrically connected to the electrode assembly (10).