Patent ID: 8025997

Claim:
A battery pack, comprising: a case including a frame, a film covering an opening of the frame to form a space inside the frame, and a housing unit not covered by the film; and a unit battery cell placed in the space inside the frame; wherein the film is disposed on a surface of the frame adjacent to the opening and an outer circumferential surface of the frame; wherein a recess, having a depth equal to a thickness of the film, is formed on the outer circumferential surface of the frame immediately adjacent to the opening so that the film is bound to the outer circumferential surface of the frame and is disposed within the recess; and wherein the housing unit extends from a side portion of the frame and houses a plurality of contact terminals, the contact terminals being electrically connected to the unit battery cell so as to connect the battery pack and an applied device via a plurality of openings in the housing unit.