BATTERY PACK AND DEVICE INCLUDING THE SAME

A battery pack according to one embodiment of the present disclosure includes a battery module including a first sub-battery module and a pair of second sub-battery modules disposed on both sides of the first sub-battery module, respectively; a pack frame on which the battery module is mounted; and a pair of connection portions that penetrate through the upper and lower portions of the first sub-battery module and the pair of second sub-battery modules, respectively, wherein both sides of the pair of connection portions are fixed to the side surface portion of the pack frame, wherein the first sub-battery module is fixed to the bottom surface of the pack frame, and wherein the second sub-battery module moves along the longitudinal direction of the connection portion.