Fuel cell system method and apparatus employing oxygen sensor

Details Fuel cell system method and apparatus employing oxygen sensor Fuel cell system method and apparatus employing oxygen sensor

2005-05-03

2005-05-03

Kalafut, Stephen J. (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S006000, C700S292000, C700S299000

Reexamination Certificate

active

06887606

ABSTRACT:
A controller in a fuel cell system performs various operating parameter checks at a predefined schedule, including one or more of a stack current check; a stack voltage check; a cell voltage check; a purge cell check; an oxygen concentration check; a hydrogen concentration check; a stack temperature check; an ambient air temperature check; a fuel pressure check; and an airflow rate check; a hydrogen sensor heater check; a battery voltage check; a microcontroller self-check; and/or toggling a watchdog. The frequency of the checks are set relative to achieve an efficient control of the fuel cell system by selectively distributing the load on the microcontroller.

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