Patent ID: 6743539
Filing Date: 2004-06-01
Classification: B60L,H01M,Y02E,Y02T

Abstract:
A fan control system for a fuel cell cooling system of the type having a first coolant loop and a second coolant loop, the fan control system comprising:a first sensor generating a first input signal as a function of a coolant heat energy in a first coolant loop; a second sensor generating a second input signal as a function of a coolant temperature in a second coolant loop; and a controller including a first control circuit receiving said first input signal and generating a first control signal having a high state and a low state, a second control circuit receiving said second input signal and generating a second control signal having a high state and a low state, and a fan control circuit receiving said first and second control signals and generating a fan enable signal when at least one of said first and second control signals are in said high state, and generating a fan disable control signal when both said first and second control signals are in said low state.