US Patent 9219268 Rechargeable secondary battery

An embodiment of the present invention provides a rechargeable secondary battery, which can rapidly cut off charge and/or discharge paths by a force provided from an elastic force offering part in addition to fusion of a fuse when an external short circuit or overcharge occurs to the rechargeable secondary battery. To this end, there is provided a rechargeable secondary battery including: a case; an electrode assembly in the case; a collector plate coupled to the electrode assembly and comprising a fuse part; a terminal coupled to the collector plate and extending to an outside of the case; and an elastic force offering part between the case and the collector plate.