Patent ID: 11894588
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 17:
18. The process as recited in claim 17, further comprising:
determining, using the at least one processor, a waste heat based on an ideal voltage from the fuel cell stack, an actual voltage from the fuel cell stack, an actual current generated by the fuel cell stack, and a latent heat;
determining, using the at least one processor, an estimated flow rate of the coolant through the coolant passage based on the pressure drop, a coefficient of laminar flow associated with the coolant, a viscosity of the coolant at the average temperature of the coolant, a coefficient of turbulent flow associated with the coolant, and a density of the coolant at an average temperature of the coolant;
determining, using the at least one processor, an estimated delta temperature associated with the pressure drop based on the waste heat, the estimated flow rate, a density of the coolant, and a specific heat capacity of the coolant;
determining, using the at least one processor, a high-pass filter input based on the estimated delta temperature and a loop instant number;
determining, using the at least one processor, a high-pass filtered delta temperature associated with the pressure drop based on the high-pass filter input, a time constant associated with the high-pass filter, a time step, the loop instant number, and a low-pass filter;
determining, using the at least one processor, a measured delta temperature in response to the at least one processor receiving the temperature signal from the at least one temperature sensor;
determining, using the at least one processor, a low-pass filtered measured delta temperature associated with the temperature of the coolant based on the measured delta temperature, the time step, the loop instant number, and the time constant; and
determining, using the at least one processor, the delta temperature feedback based on the high-pass filtered delta temperature, the low-pass filtered measured delta temperature, and the loop instant number.