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Title: Powerpath controller for fuel cell & battery hybridisation
Authors: Howroyd, Simon R.
Chen, Rui
Keywords: PEM fuel cell
Powerpath controller
Ideal diode
Issue Date: 2016
Publisher: © The Authors. Published by Elsevier
Citation: HOWROYD, S.R. and CHEN, R., 2016. Powerpath controller for fuel cell & battery hybridisation. International Journal of Hydrogen Energy, 41(7), pp. 4229–4238.
Abstract: Proton Exchange Membrane (PEM) fuel cells are a chemically fuelled power supply which generally have a higher energy density than Lithium-Polymer Battery (LIPOs) but a much lower power density. In order for PEM fuel cells to increase the endurance of an in-service battery power supply, without decreasing the peak power, it should be hybridised with a battery. It is key for the market that the overall switch to hybrid technology is low cost in terms of size, weight and money.Hybrid technology tends to be generically designed to suit any power system, using regulators to ensure voltage matching, and diodes to control the direction of electrical flow. Many electric motors are controlled by speed controllers which can regulate the thrust provided by the motor, accounting for fluctuations in voltage usually found in a depleting battery. Using diode and regulator based hybrids for electric motor applications is therefore inherently inefficient even if complicated synchronous DC-DC converters are used due to the increased cost, size and weight.This paper demonstrates the ability to use ideal diodes to control the flow of electricity through the hybrid and that voltage regulation is not needed for a motor in this case. Furthermore, this paper explores the natural balancing strategy created by duty cycling the PEM fuel cell to different points within it's polarisation curve, removing the requirement for DC-DC converters to match it to the battery voltage. The changes made improve the efficiency of the hybrid power electronics to over 97%.
Description: This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
Sponsor: The author would like to thank EPSRC for funding the project through the Doctoral Training Centre in Hydrogen, Fuel Cells and Their Applications (EP/G037116/1).
Version: Published
DOI: 10.1016/j.ijhydene.2016.01.038
URI: https://dspace.lboro.ac.uk/2134/20481
Publisher Link: http://dx.doi.org/10.1016/j.ijhydene.2016.01.038
ISSN: 0360-3199
Appears in Collections:Published Articles (Aeronautical and Automotive Engineering)

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