Patent ID: 8114536

Claim:
A battery pack constructed by loading cylindrical batteries as unit cells to a spacer wherein: the spacer is provided at opposite major surfaces of a rectangular frame with pluralities of semi-cylindrical battery receiving parts corresponding to outer surfaces of the cylindrical batteries, the battery receiving parts being partially open such that the battery receiving parts communicate with neighboring battery receiving parts on the same plane, and mounting the cylindrical batteries with the spacer to a frame member; the frame member includes an upper frame member having one major surface to which a protection circuit module (PCM) is mounted, and a lower frame member coupled with the upper frame member, the upper and lower frame members being provided at opposite major surfaces thereof with semi-cylindrical battery receiving parts corresponding to outer surfaces of the cylindrical unit cells mounted between the upper and lower frame members; the spacer is provided at positions where every four battery receiving parts adjacent to each other on the same plane and the opposite plane of the frame intersect with vertical through-channels, wherein the vertical through-channels communicate with first through-holes disposed in an opening part of the battery receiving parts; the battery receiving parts further comprising second through-holes through which the battery receiving parts formed at one major surface of the frame communicate with the battery receiving parts formed at the other major surface of the frame; and the upper frame member is provided at an upper major surface thereof with assemblable coupling parts for coupling the PCM to the upper frame member.