Cap assembly for a rechargeable battery

Disclosed is a rechargeable battery that includes an electrode assembly including a first electrode, a second electrode, and a separator disposed between the first and second electrodes; a case housing the electrode assembly; and a cap assembly connected to the case. The cap assembly includes a first short-circuit tab electrically connected to the first electrode, a second short-circuit tab electrically connected to the second electrode, a deformable plate electrically connecting the first short circuit tap to the second short circuit tap by being transformed upon the pressure increase, and a connection member formed between the short-circuit tap and the deformable plate or formed between the short-circuit tap and the electrode assembly.