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

The present disclosure relates to a battery module including: an electrode assembly capable of storing and supplying electrical energy; a battery exterior material of a hexahedral shape accommodating the electrode assembly therein; a first tab portion that is electrically connected to the electrode assembly and that protrudes to an outside of the battery exterior material; and a second tab portion that extends in the first direction from a free end of the first tab portion and that is provided with a different length from a predetermined length of the first tab portion, based on a second direction in parallel with a shortest edge of the battery exterior material among direction perpendicular to the first direction; and a bus bar assembly positioned between the battery exterior material and the second tab portion to be electrically connected to the electrode assembly.