Accurate supercapacitor modeling for energy-harvesting wireless sensor nodes


Weddell, Alex, Merrett, Geoff V., Kazmierski, Tom and Al-Hashimi, Bashir (2011) Accurate supercapacitor modeling for energy-harvesting wireless sensor nodes IEEE Transactions on Circuits and Systems II Express Briefs, 58, (12), pp. 911-915. (doi:10.1109/TCSII.2011.2172712).

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Description/Abstract

Supercapacitors are often used in energy-harvesting wireless sensor nodes (EH-WSNs) to store harvested energy. Until now, research into the use of supercapacitors in EH-WSNs has considered them to be ideal or over-simplified, with non-ideal behavior attributed to substantial leakage currents. In this brief, we show that observations previously attributed to leakage are predominantly due to redistribution of charge inside the supercapacitor. We confirm this hypothesis through the development of a circuit-based model which accurately represents non-ideal behavior. The model correlates well with practical validations representing the operation of an EH-WSN, and allows behavior to be simulated over long periods.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1109/TCSII.2011.2172712
ISSNs: 1057-7130 (print)
Related URLs:
Keywords: energy harvesting, supercapacitor modeling, system simulation, wireless sensor networks, supercapacitor leakage
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Organisations: Electronic & Software Systems, EEE
ePrint ID: 272829
Date :
Date Event
22 September 2011Accepted/In Press
December 2011Published
Date Deposited: 22 Sep 2011 12:37
Last Modified: 17 Apr 2017 17:38
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/272829

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