Patent ID: 8765281

Claim:
A rechargeable battery comprising: an electrode assembly comprising a positive electrode, a negative electrode and a separator separating the positive electrode and the negative electrode, the electrode assembly including bended parts at opposite ends and a central part between the bended parts, a thickness of the central part being less than that of the bended parts such that the electrode assembly has a dumbbell shape in which each of opposite sides of the central tart corn rises a flat surface or is protruded inward toward a midplane of the electrode assembly; a positive terminal electrically connected to the positive electrode and a negative terminal electrically connected to the negative electrode; a casing having a spatial area receiving and containing the electrode assembly therein and being arranged to expose the positive terminal and the negative terminal, the casing including a first side portion, a second side portion, and a central portion between the first and second side portions, a thickness of the central portion being less than that of the first and second side portions such that the casing has a dumbbell shape corresponding to that of the electrode assembly; and a heat dissipating body receiving and holding the casing for applying pressure on the electrode assembly through the casing, an inner periphery of the heat dissipating body having a dumbbell-shaped cross section corresponding to the dumbbell shape of the casing.