BATTERY PACK HAVING STRUCTURE CAPABLE OF SWELLING CONTROL AND VEHICLE INCLUDING THE BATTERY PACK

A battery pack includes a plurality of battery cell stacks, each battery cell stack having a plurality of battery cells stacked in a first direction; a pack tray in which the plurality of battery cell stacks are accommodated in a plurality of rows extending in a second direction perpendicular to the first direction, each row having multiple battery cell stacks arranged in the second direction, the pack tray including: a base, a plurality of sidewalls extending from the base, a plurality of first beams extending in the second direction to separate the plurality of rows into groups, and a plurality of partition walls extending in the second direction, each partition wall being located within a corresponding group to separate adjacent battery cells stacks from each other; a pack cover covering an opening portion of the pack tray opposite the base; and a plurality of elastic members.