SECONDARY BATTERY AND BATTERY PACK INCLUDING THE SAME

A secondary battery includes a case having an opening, an electrode assembly in the case, and a cap assembly configured to seal the opening of the case, the cap assembly including a cap-up exposed to an outside of the case, a vent plate between the cap-up and the electrode assembly, the vent plate being electrically connected to the cap-up, a cap-down between the vent plate and the electrode assembly, the cap-down being electrically connected to the vent plate and the electrode assembly, a first insulator between the vent plate and the electrode assembly, and a second insulator between the vent plate and the electrode assembly, the second insulator being spaced apart from the first insulator and being configured to support the vent plate.