An auxiliary power unit (APU) (10), e.g. for an aircraft, providing electrical power to at least one load (30, 31, 38; 124) includes: an array (14; 214) of fuel cells comprising a plurality of sets (210, 212, 226) of series-connected fuel cells (216, 218, 220); at least one switch (222, 224) having a first state condition corresponding to an electrical coupling of at least two of the sets in parallel and a second state condition corresponding to an electrical uncoupling of the at least two of the sets in parallel; and a controller (12) operably coupled to the at least one switch and controlling the change of state of the switch between the first state condition and the second state condition. At least two of the sets are interconnected in parallel when the switch is in the first state condition to increase the current provided by the APU.
Fuel cell-based auxiliary power unit
2016-04-20
Patent
Electronic Resource
English
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