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Proceedings Paper

On the energy storage devices in piezoelectric energy harvesting
Author(s): Mingjie Guan; Wei-Hsin Liao
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Paper Abstract

Using piezoelectric elements to harvest energy from ambient vibration has been of great interest recently. Because the power harvested from the piezoelectric elements is relatively low, energy storage devices are needed to accumulate the energy for intermittent use. In this paper, we compare several energy storage devices including conventional capacitors, rechargeable batteries, and supercapacitors in piezoelectric energy harvesting. Their charge/discharge efficiency, adaptability, lifetime, and self-discharge are investigated and discussed. A quick test method is proposed to experimentally study the charge/discharge efficiency of the energy storage devices. The results show that the supercapacitors are suitable and more attractive than the rechargeable batteries as energy storage devices in piezoelectric energy harvesting for wireless sensor networks.

Paper Details

Date Published: 15 March 2006
PDF: 9 pages
Proc. SPIE 6169, Smart Structures and Materials 2006: Damping and Isolation, 61690C (15 March 2006); doi: 10.1117/12.658402
Show Author Affiliations
Mingjie Guan, The Chinese Univ. of Hong Kong (Hong Kong China)
Wei-Hsin Liao, The Chinese Univ. of Hong Kong (Hong Kong China)


Published in SPIE Proceedings Vol. 6169:
Smart Structures and Materials 2006: Damping and Isolation
William W. Clark; Mehdi Ahmadian; Arnold Lumsdaine, Editor(s)

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