BATTERY PACK

A battery pack includes a housing frame to accommodate a battery cell; and an insulating frame provided between the battery cell and the housing frame, and including an opening through which a bottom of the battery cell is exposed to a bottom of the housing frame, a flange portion that extends along a periphery of the opening, defines the opening, and faces the bottom of the battery cell, and a side portion that is bent from the flange portion and faces a side surface of the battery cell, wherein the flange portion of the insulating frame includes a convex pattern that protrudes toward the bottom of the battery cell, and a flow channel that forms a flow path for an adhesive, the flow channel being a stepped portion stepped down from the convex pattern in a depth direction of the flange portion opposite to the bottom of the battery cell.