Patent ID: 8808898

Claim:
A battery pack, comprising: a first stack of battery modules including a first plurality of battery modules arranged in parallel in side by side relationship extending in a longitudinal direction, and each battery module of the first stack includes a top interstack coupling surface and a bottom interstack coupling surface that extend in a transverse and longitudinal plane, and a first intermodule coupling side face and a second intermodule coupling side face that extend in a vertical and transverse plane; a second stack of battery modules including a second plurality of battery modules arranged in parallel in side by side relationship extending in the longitudinal direction, and each battery module of the second stack includes a top interstack coupling surface and a bottom interstack coupling surface that extend in the transverse and longitudinal plane, and a first intermodule coupling side face and a second intermodule coupling side face that extend in the vertical and transverse plane; and at least one heat exchanger including a first plate and a second plate, the heat exchanger being located below the first stack in a vertical direction and above the second stack in the vertical direction such that said heat exchanger is in thermal contact with the top interstack coupling surface of the battery modules of the second stack and the bottom interstack coupling surface of the battery modules of the first stack, wherein each of the battery modules of the first stack includes a case with a lip, and the first plate of the heat exchanger comprises ridges adapted to receive the lips of the battery module cases of the first stack such that the first plate is in direct contact with the bottom interstack coupling surface of each of the battery modules of the first stack, and wherein each of the battery modules of the second stack includes a case with a lip, and the second plate of the heat exchanger comprises ridges adapted to receive the lips of the battery module cases of the second stack such that the second plate is in direct contact with the top interstack coupling surface of each of the battery modules of the second stack.