BATTERY CELL, BATTERY MODULE, AND MANUFACTURING METHOD OF THE SAME

The present disclosure relates to a battery module comprising: an electrode assembly capable of storing and supplying electrical energy; a battery exterior material accommodating the electrode assembly therein; a first tab portion electrically connected to the electrode assembly and protruding out of the battery exterior material along a first direction; a second tab portion extending along a first direction in which the first tab portion protrudes from a free end of the first tab portion and provided with a different length from a predetermined length of the first tab portion, based on a second direction perpendicular to a surface provided with the largest area among surfaces of the battery exterior material disposed along the first direction; and a bus bar assembly surrounding the second tab portion and electrically connected to the electrode assembly.