Patent ID: 8557425

Claim:
A battery pack apparatus comprising a plurality of generally flat battery cells, and a plurality of cell coverings, each cell covering having an internal space that receives at least two battery cells, each of the cell coverings having external first and second planar faces that face away from the at least two battery cells which are received in the respective internal space, the plurality of cell coverings being arranged such that the first planar face of each cell covering faces the second planar face of an adjacent one of the plurality of cell coverings and is spaced therefrom, each of the cell coverings being constructed such that the first and second planar faces of adjacent cell coverings define a converging air flow space between each adjacent pair of the plurality of cell coverings such that a plurality of generally parallel converging air flow spaces are defined between the cell coverings, each of the converging air flow spaces being wider at an air inlet end of the air flow space and narrower at an air outlet end of the air flow space, the at least two battery cells in the internal space abutting each other, wherein each of the cell coverings has a plurality of standoffs extending from the first and second planar faces to maintain proper spacing between adjacent pairs of cell coverings, wherein the standoffs extending from the first planar face of each cell covering comprise a plurality of pedestals and the standoffs extending from the second planar face of each cell covering comprises a plurality of pedestal receivers, and wherein the pedestals comprise cylindrical portions and the pedestal receivers comprise annular rings that receive the pedestals.