Patent ID: 7597993

Claim:
A battery pack, comprising a housing forming only one compartment; a plurality of battery cells located in said one compartment of said housing and having longitudinal axes; and heat-diffusing means for diffusing heat from said battery cells, said heat diffusing means including a wall of said housing which is peripherally adjacent to said battery cells from outside of said battery cells and is shaped so that it forms at least one peripherally closed and uninterrupted duct which extends parallel to said longitudinal axes of said battery cells from one axial side to another side of said housing, is open outside at said one and another axial sides, and is closed off in its entirety from said one compartment of said housing in which said battery cells are located, for passing a heat-diffusing medium, wherein said at least one duct is located in a nip between individual ones of said battery cells and has wall regions that rest in form-locking fashion against said battery cells that are located adjacent to said wall regions.