Patent ID: 8623531

Claim:
A battery pack comprising: a bare cell having a bare cell surface; at least one recess structure formed in the bare cell and recessed from the bare cell surface, the recess structure comprising a coupling groove and a non-coupling portion; a protection circuit module arranged over the bare cell surface and electrically connected to the bare cell; at least one coupling member having one portion coupled to the protection circuit module and another portion contacting the bare cell surface, the at least one coupling member comprising a coupling hole aligned with the at least one recess structure; at least one screw bolt coupled to the coupling groove of the at least one recess structure through the coupling hole of the at least one coupling member; and the non-coupling portion located in an opening part of the at least one recess structure and wider than the coupling groove, wherein a gap is formed within the recess structure between the screw bolt and an inner wall of the non-coupling portion; wherein the at least one screw bolt comprises a screw head, wherein the non-coupling portion is disposed between the screw head and the coupling groove.