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Ultracapacitor/battery hybrid designs: Where are we?

Carey O’Donnell

Charles Finin

Howard Gartland

This paper discusses recent developments in ultracapacitor design and capabilities and explores the growing potential of ultracapacitors in traditional energy storage applications. There is increasing interest in exploring battery / ultracapacitor hybrid designs as an alternative to current approaches involving batteries coupled with flywheels, fuel cells, and generator sets. The paper presents data that demonstrates the ability of an ultracapacitor to deliver high-rate, short duration current to complement traditional lead acid battery performance, providing a best of both worlds hybrid solution aimed at reducing battery cost, footprint, and maintenance, while increasing overall system performance and reliability.

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