SECONDARY BATTERY

The present disclosure relates to a battery cell, including: an electrode assembly including a first electrode and a second electrode, a case configured to accommodate the electrode assembly and including an open area on a first side, a cap plate configured to seal the open area and including a first terminal and electrically connected to the first electrode and a second terminal electrically connected to the second electrode, a first vent on the cap plate, and a second vent on a lower surface of the case opposite to the cap plate.