US 12,272,847 B2
System and method for controlling voltage of fuel cell
Nathaniel Ian Joos, Toronto (CA); and Paolo Forte, Maple (CA)
Assigned to HYDROGENICS CORPORATION, Mississauga (CA)
Filed by HYDROGENICS CORPORATION, Mississauga (CA)
Filed on Sep. 26, 2022, as Appl. No. 17/953,153.
Application 16/884,453 is a division of application No. 14/892,888, granted, now 10,985,392, previously published as PCT/CA2014/050175, filed on Mar. 6, 2014.
Application 17/953,153 is a continuation of application No. 16/884,453, filed on May 27, 2020, granted, now 11,456,470.
Claims priority of provisional application 61/827,318, filed on May 24, 2013.
Prior Publication US 2023/0061237 A1, Mar. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 8/04858 (2016.01); H01M 8/04089 (2016.01); H01M 8/04537 (2016.01); H01M 8/04746 (2016.01); H01M 16/00 (2006.01); H01M 8/0432 (2016.01)
CPC H01M 8/0488 (2013.01) [H01M 8/04097 (2013.01); H01M 8/04559 (2013.01); H01M 8/04753 (2013.01); H01M 16/006 (2013.01); H01M 8/04365 (2013.01); H01M 8/04761 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method comprising,
a) providing a fuel cell stack having an air inlet, an air exhaust, and a recirculation line between the air exhaust from the fuel cell stack and the air inlet of the fuel cell stack, the fuel cell stack configured to connect to a load;
b) providing a battery configured to connect to the load;
c) recirculating a portion of air exhausted through the air exhaust to the air inlet though the recirculation line;
d) controlling a valve configured to adjust a rate of air flow through the recirculation line; and
e) adjusting the valve so that a voltage output by the fuel cell stack is within a range of a voltage output by the battery, wherein the step of adjusting includes adjusting the valve so that the voltage output by the fuel cell stack more nearly matches the voltage output by the battery.