Patent ID: 6835483
Filing Date: 2004-12-28
Classification: H01M,Y02E

Abstract:
A fuel cell system, comprising:a fuel cell stack and a first coolant circuit, wherein the first coolant circuit is adapted to circulate a first coolant through the fuel cell stack and transfer heat from the fuel cell stack to a heat sink; a second heat source and a second coolant circuit, wherein the second coolant circuit is adapted to circulate a second coolant through the second heat source to transfer heat from the second heat source to the heat sink; a controller connected to a first pump and adapted to vary an output of the first pump, wherein the first pump is located in the first coolant circuit; and a second pump, wherein the controller is connected to the second pump and adapted to vary an output of the second pump, and wherein the second pump is located in the second coolant circuit, wherein the heat sink comprises a heat exchanger that includes a first flow path adapted to receive a flow of the first coolant, a second flow path separate from the first flow path adapted to receive a flow of the second coolant and a third flow path separate from the first and second flow paths adapted to receive a flow of a third fluid.