Abstract: A rechargeable battery including a bare cell with an electrode assembly having two electrodes and a separator, a case for storing the electrode assembly, a cap plate for covering an opening of the case, and a protection circuit module coupled with the cap assembly. A portion of the lower surface of the protection circuit module is formed of a synthetic resin, and contacts a region of the cap plate also formed of a synthetic resin. The protection circuit module and the cap plate an be coupled together by adhesion, welding or melting.

Abstract: A secondary battery having an electrode assembly with improved battery capacity. The secondary battery has an electrode assembly including two electrodes and a separator, a case made from an insulative material and having an opening at an upper portion thereof for receiving the electrode assembly therein, and a cap assembly including a cap plate made from an insulative material for sealing the opening to prevent the electrode assembly from being separated from the case.

Abstract: A lithium rechargeable battery includes an electrode assembly that has a first electrode and a second electrode that are wound together with a separator interposed between them, a can that houses the electrode assembly, and a heat-resistant member that is positioned in between the bottom of the interior of the can and the electrode assembly.

Abstract: A lithium ion secondary battery has a shape memory safety vent adapted to discharge internal compressed gas by temporarily being opened when the temperature reaches a predetermined level to avoid a swelling phenomenon of the battery and improve safety. The lithium ion secondary battery includes an electrode assembly having first and second electrode plates wound a number of times with a separator interposed between them; a can having an opening formed on a side thereof to contain the electrode assembly; and a cap plate adapted to cover the can and provided with a vent hole on a side thereof, to which a safety vent adapted to deform at a predetermined temperature and discharge gas from inside the can to the exterior is coupled.

Abstract: A lithium secondary battery includes an electrode assembly having first and second electrodes wound together with a separator interposed between them and an insulation case positioned on the electrode assembly. The insulation case is made of a resin or resin composite material having a tensile strength of at least 500 kg/cm2.

Abstract: An electrode assembly is adapted to prevent the separator from contracting due to heat that is generated near the electrode tab during overcharging, over-discharging, or in the case of an internal short circuit. The electrode assembly also prevents an additional short circuit between the electrode plates. A rechargeable battery that comprises the electrode assembly is also provided. The present invention prevents the electrode tab from being short-circuited due to increased heat generation during overcharging or in the case of a short circuit, thus improving the safety of the rechargeable battery.