Journal of Power Sources Article in Press, Accepted Manuscript - Note to users doi:10.1016/j.jpowsour.2011.02.012 | How to Cite or Link Using DOI Copyright 2011 Published by Elsevier B.V. Permissions Reprints Dynamic Behaviour of Li Batteries in Hydrogen Fuel Cell Power Trains O. Veneri a , F. Migliardini a , C. Capasso a and P. Corbo , a , a Istituto Motori–National Research Council (CNR), Via Marconi, 8–80125 Naples, Italy Received 27 October 2010; revised 14 January 2011; accepted 5 February 2011. Available online 12 February 2011. Abstract A Li ion polymer battery pack for road vehicles (48V, 20 Ah) was tested by charging/discharging tests at different current values, in order to evaluate its performance in comparison with a conventional Pb acid battery pack. The comparative analysis was also performed integrating the two storage systems in a hydrogen fuel cell power train for moped applications. The propulsion system comprised a fuel cell generator based on a 2.5kW polymeric electrolyte membrane (PEM) stack, fuelled with compressed hydrogen, an electric drive of 1.8kW as nominal power, of the same typology of that installed on commercial electric scooters (brushless electric machine and controlled bidirectional inverter). The power train was characterized making use of a test bench able to simulate the vehicle behaviour and road characteristics on driving cycles with different acceleration/deceleration rates and lengths. The power flows between fuel cell system, electric energy storage system and electric drive during the different cycles were analyzed, evidencing the effect of high battery currents on the vehicle driving range. The use of Li batteries in the fuel cell power train, adopting a range extender configuration, determined a hydrogen consumption lower than the correspondent Pb battery/fuel cell hybrid vehicle, with a major flexibility in the power management. Keywords: PEM fuel cells; hydrogen; hybrid vehicles; lithium battery; power management
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