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Proceedings Paper

Hybrid power systems for autonomous MEMS
Author(s): Daniel M. Bennett; Richard H. Selfridge; Paul Humble; John N. Harb
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Paper Abstract

This paper describes the design of a hybrid power system for use with autonomous MEMS and other microdevices. This hybrid power system includes energy conversion and storage along with an electronic system for managing the collection and distribution of power. It offers flexibility and longevity in a compact package. The hybrid power system couples a silicon solar cell with a microbattery specially designed for MEMS applications. We have designed a control/interface charging circuit to be compatible with a MEMS duty cycle. The design permits short pulses of 'high' power while taking care to avoid excessive charging or discharging of the battery. Charging is carefully controlled to provide a balance between acceptably small charging times and a charging profile that extends battery life. Our report describes the charging of our Ni/Zn microbatteries using solar cells. To date we have demonstrated thousands of charge/discharge cycles of a simulated MEMS duty cycle.

Paper Details

Date Published: 16 August 2001
PDF: 9 pages
Proc. SPIE 4334, Smart Structures and Materials 2001: Smart Electronics and MEMS, (16 August 2001); doi: 10.1117/12.436621
Show Author Affiliations
Daniel M. Bennett, Brigham Young Univ. (United States)
Richard H. Selfridge, Brigham Young Univ. (United States)
Paul Humble, Brigham Young Univ. (United States)
John N. Harb, Brigham Young Univ. (United States)

Published in SPIE Proceedings Vol. 4334:
Smart Structures and Materials 2001: Smart Electronics and MEMS
Vijay K. Varadan, Editor(s)

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