Secondary Battery with improved Stability having Heat Expandable layer and Method thereof

摘要

In a battery pack including a plurality of battery cells, the present invention effectively discharges heat generated during charging and discharging and internal gas generated thereby to the outside of the battery cell by applying a thermal expansion layer to the junction of the pouch-type battery cell. It relates to a pouch-type secondary battery incorporating a thermally expansible layer, and a method for manufacturing the same, characterized in that it is possible to improve the safety of the pouch-type secondary battery by discharging the gas generated inside the pouch-type secondary battery, and the interior of the secondary battery Since it uses the temperature of the gas generated from the , it has the effect that it can be operated without a separate device or an external power source.