Danger sensing battery cell

Disclosed is battery cell including a reception unit of a battery case having an electrode assembly and an electrolytic solution received therein, a gas storage unit disposed outside the reception unit, a storage space in the gas storage unit being partitioned into two or more sections, and a sensor, wherein a signal is sensed by the sensor when the two or more sections of the gas storage unit are filled with gas. In the case in which the sensed signal deviates from a predetermined value, an alarm member signals danger, whereby an accident is prevented.