PEM fuel cell model for system simulation and integration

This paper presents a model of the Proton Exchange Membrane Fuel Cell (PEMFC) suitable for system simulation and optimisations using physically meaningful parameters. It is capable of modelling the transient behaviour and distributed nature of the cell. The model of the PEMFC is built up using discrete model elements representing subcomponents of the cell. Built in PSPICE, MATLAB/Simulink and VTB, the proposed model closely follows the physical layout of the actual cell. The interactions of chemical reactants, products and the main electrical circuit are represented in an electrochemically and physically accurate manner. The interactions include those of the water and protons, electrode-electrolyte charge double layer, reactant diffusion induced voltage drops and cross-over currents. Results are given for steady-state and transient operation and compared to experimental results. Conclusions are drawn concerning the ease of use of the model. (author)