Maximizing the lifetime of embedded systems powered by fuel cell-battery hybrids

Jianli Zhuo, Chaitali Chakrabarti, Naehyuck Chang, Sarma Vrudhula

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations

Abstract

Fuel cells are a viable alternative power source for portable applications. They have higher energy density than traditional Li-ion batteries and can achieve longer lifetime for the same weight or volume. However, because of their limited power density, they can not track fluctuations in the load current fast. A hybrid power source, that consists of a fuel cell and a Li-ion battery, has the advantages of long lifetime and good load following capabilities. In this work, we consider the problem of extending the lifetime of a fuel-cell based hybrid source that is used to provide power to a DVFS processor. We propose a new algorithm that is built on top of an energy based optimization framework. The algorithm simultaneously adjusts the fuel flow rate (at the producer end), and judiciously scales the load current (at the consumer end) to minimize the energy loss of the hybrid system. Simulations on randomly generated task sets demonstrate the superiority of this algorithm with respect to an algorithm that does not allow adjustment of the fuel flow rate.

Original languageEnglish (US)
Title of host publicationISLPED'06 - Proceedings of the 2006 International Symposium on Low Power Electronics and Design
Pages424-429
Number of pages6
DOIs
StatePublished - Dec 1 2006
EventISLPED'06 - 11th ACM/IEEE International Symposium on Low Power Electronics and Design - Tegernsee, Bavaria, Germany
Duration: Oct 4 2006Oct 6 2006

Publication series

NameProceedings of the International Symposium on Low Power Electronics and Design
Volume2006
ISSN (Print)1533-4678

Other

OtherISLPED'06 - 11th ACM/IEEE International Symposium on Low Power Electronics and Design
CountryGermany
CityTegernsee, Bavaria
Period10/4/0610/6/06

Keywords

  • Battery
  • DVFS system
  • Fuel cell
  • Hybrid systems
  • Task scaling

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Zhuo, J., Chakrabarti, C., Chang, N., & Vrudhula, S. (2006). Maximizing the lifetime of embedded systems powered by fuel cell-battery hybrids. In ISLPED'06 - Proceedings of the 2006 International Symposium on Low Power Electronics and Design (pp. 424-429). (Proceedings of the International Symposium on Low Power Electronics and Design; Vol. 2006). https://doi.org/10.1145/1165573.1165676