Hello,
I am working on a PEM Fuel Cell + Battery hybrid model in Simulink for a UAV application. I have attached two screenshots of my current model (Fuel Cell stack with inputs and the Battery block).
I have a few specific questions:
Connecting Fuel Cell and Battery
I want to connect the black Fuel Cell stack (with hydrogen, air, and thermal inputs) to the blue Battery and DC system blocks (as shown in my screenshots).
What is the correct way to connect them together? Should I use a DC-DC converter in between, or can I directly connect them?
Varying Hydrogen Flow Rate
Currently, I am providing constant values for pfuel, qfuel, pair, and qair.
How can I make qfuel (hydrogen flow rate) time-varying instead of constant? For example, decreasing with time or following a load demand profile.
Hydrogen Consumption vs Time Graph
I want to plot the hydrogen consumption vs time (i.e., how much hydrogen is used and at what time it is consumed).
Is there any built-in output port in the Fuel Cell stack block that gives hydrogen consumption directly?
Or should I calculate hydrogen consumption from qfuel flow rate input over simulation time?
Parameter Values
I am not fully sure about the typical values for hydrogen flow rate (qfuel), air flow rate (qair), and pressures (pfuel, pair) for a small PEM Fuel Cell stack (like 35 cells, area 9 cm²).
Can you please suggest what values are normally used in Simulink models for these inputs?
Any guidance or example models would be really helpful.
Thanks in advance!Hello,
I am working on a PEM Fuel Cell + Battery hybrid model in Simulink for a UAV application. I have attached two screenshots of my current model (Fuel Cell stack with inputs and the Battery block).
I have a few specific questions:
Connecting Fuel Cell and Battery
I want to connect the black Fuel Cell stack (with hydrogen, air, and thermal inputs) to the blue Battery and DC system blocks (as shown in my screenshots).
What is the correct way to connect them together? Should I use a DC-DC converter in between, or can I directly connect them?
Varying Hydrogen Flow Rate
Currently, I am providing constant values for pfuel, qfuel, pair, and qair.
How can I make qfuel (hydrogen flow rate) time-varying instead of constant? For example, decreasing with time or following a load demand profile.
Hydrogen Consumption vs Time Graph
I want to plot the hydrogen consumption vs time (i.e., how much hydrogen is used and at what time it is consumed).
Is there any built-in output port in the Fuel Cell stack block that gives hydrogen consumption directly?
Or should I calculate hydrogen consumption from qfuel flow rate input over simulation time?
Parameter Values
I am not fully sure about the typical values for hydrogen flow rate (qfuel), air flow rate (qair), and pressures (pfuel, pair) for a small PEM Fuel Cell stack (like 35 cells, area 9 cm²).
Can you please suggest what values are normally used in Simulink models for these inputs?
Any guidance or example models would be really helpful.
Thanks in advance! Hello,
I am working on a PEM Fuel Cell + Battery hybrid model in Simulink for a UAV application. I have attached two screenshots of my current model (Fuel Cell stack with inputs and the Battery block).
I have a few specific questions:
Connecting Fuel Cell and Battery
I want to connect the black Fuel Cell stack (with hydrogen, air, and thermal inputs) to the blue Battery and DC system blocks (as shown in my screenshots).
What is the correct way to connect them together? Should I use a DC-DC converter in between, or can I directly connect them?
Varying Hydrogen Flow Rate
Currently, I am providing constant values for pfuel, qfuel, pair, and qair.
How can I make qfuel (hydrogen flow rate) time-varying instead of constant? For example, decreasing with time or following a load demand profile.
Hydrogen Consumption vs Time Graph
I want to plot the hydrogen consumption vs time (i.e., how much hydrogen is used and at what time it is consumed).
Is there any built-in output port in the Fuel Cell stack block that gives hydrogen consumption directly?
Or should I calculate hydrogen consumption from qfuel flow rate input over simulation time?
Parameter Values
I am not fully sure about the typical values for hydrogen flow rate (qfuel), air flow rate (qair), and pressures (pfuel, pair) for a small PEM Fuel Cell stack (like 35 cells, area 9 cm²).
Can you please suggest what values are normally used in Simulink models for these inputs?
Any guidance or example models would be really helpful.
Thanks in advance! pemfc, battery, uav MATLAB Answers — New Questions

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