An energy-based method for the assessment of battery and battery-ultracapacitor energy storage systems in pulse-load applications

Yiou He, Richard Yi Zhang, John G. Kassakian

Research output: Contribution to conferencePaperpeer-review

Abstract

A new energy-based method is described for studying the performance of battery or battery-ultracapacitor energy storage systems (ESS) in pulse load applications. The method estimates the total energy available in each ESS from a small number of discrete measurements at different states-of-charge. This considerably reduces experiment time, when compared to slowly depleting the ESS over the course of several hours. To illustrate the use of this method, experiments are performed for nickel-metal hydride (NiMH) batteries and lithium-iron phosphate (LiFePO4) batteries as well as their corresponding battery-ultracapacitor paralleled systems, under various pulse-load profiles and with different ratios of capacitor rating to battery energy. The results show accuracy of the method on the order of 0.5% and the improvements in total energy by incorporating ultracapacitors range from 3% to 47%, depending upon load profiles, experimental conditions and battery-ultracapacitor combinations.

Original languageEnglish (US)
Pages2412-2419
Number of pages8
DOIs
StatePublished - May 8 2015
Externally publishedYes
Event30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015 - Charlotte, United States
Duration: Mar 15 2015Mar 19 2015

Other

Other30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015
CountryUnited States
CityCharlotte
Period3/15/153/19/15

Keywords

  • battery
  • energy measurement
  • Li-ion
  • LiFePO4
  • NiMH
  • Pulse load applications
  • ultracapacitor

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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