abstract |
The present invention relates to a safety-improved battery cell including a thermal expansion tape and a method of manufacturing the same, wherein a battery pack including a plurality of battery cells is configured such that by using the thermal expansion tape, heat generated during a charging/discharging process and by This generated internal gas is discharged to the outside of the battery cell. Thus, the present invention can improve the safety of the pouch-type secondary battery by discharging the gas generated in the pouch-type secondary battery. Furthermore, the present invention utilizes the pressure of the gas generated in the secondary battery, and thus can operate without providing a separate device and an external power source. Also, due to the configuration of the stationary unit having thermal expansion characteristics, the present invention can perform repeated gas discharge. |