Battery pack and device including same

Abstract

According to one embodiment of the present invention, a battery pack includes a lower pack frame on which a plurality of battery modules are mounted, and an upper pack frame located on an upper portion of the battery modules. At least two internal beams and side frames are formed on a bottom surface of the lower pack frame to serve as venting paths for gas generated in the battery modules, the side frames extend along an edge of a bottom surface of the lower pack frame, the at least two internal beams are spaced apart from each other, ends of the internal beams and inner surfaces of the side frames are in contact with each other, and at least one first connection portion is formed in which the ends of the internal beams and the inner surfaces of the side frames are connected to each other, and the internal beams include at least one vent hole penetrating a side of the internal beam.

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