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

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. Th...

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Bibliographic Details
Published in2015 IEEE Applied Power Electronics Conference and Exposition (APEC) pp. 2412 - 2419
Main Authors Yiou He, Zhang, Richard Y., Kassakian, John G.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.03.2015
Subjects
Accuracy
Batteries
battery
Battery charge measurement
Discharges (electric)
Energy measurement
Li-ion
LiFePO4
NiMH
Pulse load applications
Supercapacitors
ultracapacitor
Voltage measurement
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Summary: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.
ISSN:1048-2334
2470-6647
DOI:10.1109/APEC.2015.7104686