Patent ID: 8435659

Claim:
A rechargeable battery, comprising: an electrode assembly including a positive electrode, a negative electrode and a separator interposed therebetween; a case housing the electrode assembly; a cap plate connected to the case; a first terminal and a second terminal protruding from an upper part of the cap plate; and a current interrupt module electrically connected to the electrode assembly and the first terminal, wherein the current interrupt module includes a current interrupt unit coupled to the electrode assembly and the current interrupt unit is configured to uncouple from the electrode assembly when an internal pressure of the case increases, the current interrupt unit including a middle plate that includes a frame and a convex member contiguous with the frame, the frame being in direct contact with the cap plate, the convex member projecting away from the cap plate and being configured to invert, inversion of the convex member causing the convex member to protrude into a groove formed at a bottom surface of the cap plate.