Powering devices using ultra-capacitor batteries
2015 (English)In: PROCEEDINGS OF THE 2015 12TH IEEE AFRICON INTERNATIONAL CONFERENCE - GREEN INNOVATION FOR AFRICAN RENAISSANCE (AFRICON), IEEE conference proceedings, 2015Conference paper (Refereed)Text
We explore the use of ultra-capacitors as backup storage for solar powered electronic devices. We discuss two use cases: routers in off-grid broadband networks consuming a few Watt and wireless sensor network nodes using a few mW when operating and a few mu W in quiescent mode. We have been testing batteries with ultra-capacitor based cells, both EDLC and LIC, in the range from 40 to 3000F. We found them viable alternatives in some applications and started long term field tests to sort out some unclear aspects regarding maximum discharge levels. Besides the traditional function of a backup battery storage in low-power applications, the very low internal resistance of capacitors make them useful also in hybrid solutions to accommodate transient needs for high currents that traditional batteries cannot deliver. Due to the low resistance, charging/discharging can be very fast. We also show how a very simple design requiring only one LIC capacitor can power a WSN mote sending at 1 packet/minute for 6 weeks on a single charge.
Place, publisher, year, edition, pages
IEEE conference proceedings, 2015.
, Africon, ISSN 2153-0025
Batteries, Internet of Things, Lithium Ion Capacitors, LIC, Low power systems, Ultra-capacitors, Wireless sensor networks, WSN
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-183236DOI: 10.1109/AFRCON.2015.7331869ISI: 000369096500010ScopusID: 2-s2.0-84962616678ISBN: 978-1-4799-7498-6OAI: oai:DiVA.org:kth-183236DiVA: diva2:908805
12th IEEE International Conference on Green Innovation for Africon Renaissance (AFRICON), SEP 14-17, 2015, Addis Ababa, ETHIOPIA
QC 201603032016-03-032016-03-032016-09-05Bibliographically approved