Patent ID: 8450965
Filing Date: 2013-05-28
Classification: H01M,Y02E

Abstract:
1. A system for monitoring fuel cells in a fuel cell group, said system comprising: a plurality of sensors coupled to the fuel cells in the fuel cell group, each sensor monitoring a different condition of the fuel cells, said sensors being prioritized where lower priority sensors detect lower priority conditions and higher priority sensors detect higher priority conditions; a plurality of oscillators where a separate oscillator is coupled to each of the sensors, each oscillator operating at a different frequency where higher frequency oscillators are coupled to lower priority sensors and lower frequency oscillators are coupled to higher priority sensors; a light source receiving frequency signals from the oscillators, said light source switching on and off in response to the frequency signals where lower frequency signals dominate the switching of the light source; and a light pipe receiving switched light signals from the light source and providing switched light signals at an end of the light pipe.