US 11,757,116 B1
Dynamic adjustment of current or power draw for fuel cell applications with enhanced transient capabilities
Nader Zaag, Milton (CA); Sonia Sorbera, Woodbridge (CA); Hing Yan Edmond Chan, Maple (CA); and Chun Yu, Mississauga (CA)
Assigned to HYDROGENICS CORPORATIONS, Mississauga (CA)
Filed by HYDROGENICS CORPORATION, Mississauga (CA)
Filed on May 26, 2023, as Appl. No. 18/324,748.
Claims priority of provisional application 63/351,214, filed on Jun. 10, 2022.
Int. Cl. H01M 8/04858 (2016.01); H01M 8/04223 (2016.01); H01M 8/0432 (2016.01); H01M 8/04537 (2016.01); H01M 8/04701 (2016.01)
CPC H01M 8/0494 (2013.01) [H01M 8/0491 (2013.01); H01M 8/04231 (2013.01); H01M 8/04358 (2013.01); H01M 8/04559 (2013.01); H01M 8/04589 (2013.01); H01M 8/04619 (2013.01); H01M 8/04723 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
a fuel cell stack including a plurality of fuel cells,
a controller configured to:
determine a current density of the fuel cell stack,
determine a threshold voltage value based on a polarization curve of the fuel cell stack, and
compare a measured average fuel cell voltage value and the threshold voltage value,
wherein the controller is configured to:
in response to the measured average fuel cell voltage value being greater than the threshold voltage value, set an allowed current and power draw of the fuel cell stack at a first predefined threshold value, and
in response to the measured average fuel cell voltage value being less than the threshold voltage value, set the allowed current and power draw of the fuel cell stack at a second predefined threshold value, wherein the first predefined threshold value is greater than the second predefined threshold value.