Patent ID: 7927726

Claim:
A rechargeable battery, comprising: an electrode assembly that has a first electrode plate, a second electrode plate, and a separator, all of which are wound together; a can that houses the electrode assembly; a cap assembly that has a cap plate for sealing a top opening of the can and an electrode terminal that is inserted into a terminal through-hole that is formed on the cap plate; a terminal groove that is formed on top of the terminal through-hole to house the electrode terminal; a protective device groove spaced at a predetermined distance from the terminal groove; a protective device that is housed in the protective device groove with one end connected to the top surface of the electrode terminal; and a safety vent that is formed below the protective device groove, the safety vent concave from a bottom surface of the cap plate toward a top surface of the cap plate, wherein the protective device is coupled to the electrode terminal via a terminal lead wire, and one end of the terminal lead wire is disposed on the top surface of the electrode terminal.