BATTERY CELL AND METHOD FOR MANUFACTURING THE SAME

The present disclosure relates to a battery cell. The battery cell includes an electrode assembly, and a pouch case. The pouch case includes: a first opposed surface and a second opposed surface facing each other in a first direction; a first connection portion and a second connection portion disposed in a second direction and connecting the first opposed surface and the second opposed surface; and a first extension portion and a second extension portion, and the first extension portion extends from the first connection portion and the second connection portion, and the second extension portion extends from the first connection portion and the second connection portion. A distance from the first connection portion to the second connection portion in a third direction is greater than or equal to a length of the first extension portion in the third direction.