Selective current collecting design for spring- type energy harvesters

Here we present a high performance spring-type piezoelectric energy harvester that selectively collects current from the inner part of a spring shell. We analyzed themain reason behind the low efficiency of the initial design using finite element models and proposed a selective current collecting design that can considerably improve the electrical conversion efficiency of the energy harvester. We found that the newly designed energy harvester increases the output voltage by 8 times leading to an output power of 2.21 mW under an impulsive load of 2.18 N when compared with the conventional design. We envision that selective current collecting design will be used in spring-based self-powered active sensors and energy scavenging devices.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2015
Language
English
Citation

RSC ADVANCES, v.5, no.14, pp.10662 - 10666

ISSN
2046-2069
DOI
10.1039/c4ra16443a
URI
http://hdl.handle.net/10203/195330
Appears in Collection
MS-Journal Papers(저널논문)
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