Patent ID: 6740437
Filing Date: 2004-05-25
Classification: H01M,Y02E

Abstract:
A fuel cell system, comprising:a fuel cell, a fuel supply, an oxidant supply, a power demand sensor, a heat demand sensor, and a controller; wherein the fuel cell is adapted to receive a fuel flow from the fuel supply, and an oxidant flow from the oxidant supply; wherein the controller is connected to each of the fuel supply, oxidant supply, power demand sensor, and heat demand sensor, and wherein the controller is further adapted to receive a power demand signal from the power demand sensor and a heat demand signal from the heat demand sensor; wherein the controller is adapted to reduce at least one of the fuel flow and oxidant flow when there is no heat demand signal and no power demand signal; wherein the controller is adapted to increase at least one of the fuel flow and oxidant flow when there is no heat demand signal and there is a power demand signal; wherein the controller is adapted to increase at least one of the fuel flow and oxidant flow when there is no power demand signal and there is a heat demand signal; and wherein the controller is adapted to increase at least one of the fuel flow and oxidant flow when there is a power demand and a heat demand signal.