Optimal sizing of a passive hybridization fuel cell – battery

In order to size the elements of a storage system for an aeronautical application, a simplified model of a High Temperature Proton Exchange Membrane Fuel cell (HT-PEMFC) - Battery passive hybridization has been developed. It is compared to a dynamic model for validation. Sizing, done by a combinatorial algorithm, must meet a dual objective: on the one hand, satisfy the mission profile, and on the other hand, minimize the mass of the system. Several battery technologies, NiCd or lithium-ion, are studied in order to analyze the advantages and disadvantages of each in such hybridization. The characteristics of the battery appear to be decisive in the sizing of the system. The fuel cell preheating, provided by the battery, also constrains its size.