Energies 2013, 6(12), 6413-6422; doi:10.3390/en6126413

Experimental Study on a Passive Fuel Cell/Battery Hybrid Power System

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Received: 18 October 2013; in revised form: 22 November 2013 / Accepted: 3 December 2013 / Published: 10 December 2013
(This article belongs to the Special Issue Polymer Electrolyte Membrane Fuel Cells)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: A laboratory-scale passive hybrid power system for transportation applications is constructed and tested in this study. The hybrid power system consists of a fuel cell stack connected with a diode, a lithium-ion battery pack connected with a DC/DC power converter and another diode. The power converter is employed to regulate the output voltage of the battery pack. The dynamic responses of current and voltage of the stack to the start-up and acceleration of the load are experimentally investigated at two different selected output voltages of the DC/DC converter in the battery line. The power sharing of each power source and efficiency are also analyzed and discussed. Experimental results show that the battery can compensate for the shortage of supplied power for the load demand during the start-up and acceleration. The lowest operating voltage of the fuel cell stack is limited by the regulated output voltage of the DC/DC converter. The major power loss in the hybrid power system is attributed to the diodes. The power train efficiency can be improved by lowering the ratio of forward voltage drop of the diode to the operating voltage of the fuel cell stack.
Keywords: hybrid power system; fuel cell; lithium-ion battery; power converter; power train efficiency
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MDPI and ACS Style

Chen, Y.-S.; Lin, S.-M.; Hong, B.-S. Experimental Study on a Passive Fuel Cell/Battery Hybrid Power System. Energies 2013, 6, 6413-6422.

AMA Style

Chen Y-S, Lin S-M, Hong B-S. Experimental Study on a Passive Fuel Cell/Battery Hybrid Power System. Energies. 2013; 6(12):6413-6422.

Chicago/Turabian Style

Chen, Yong-Song; Lin, Sheng-Miao; Hong, Boe-Shong. 2013. "Experimental Study on a Passive Fuel Cell/Battery Hybrid Power System." Energies 6, no. 12: 6413-6422.

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