Battery-supercapacitor hybrid system for high-rate pulsed load applications

Donghwa Shin, Younghyun Kim, Jaeam Seo, Naehyuck Chang, Yanzhi Wang, Massoud Pedram

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

50 Scopus citations

Abstract

Modern batteries (e.g., Li-ion batteries) provide high discharge efficiency, but the rate capacity effect in these batteries drastically decreases the discharge efficiency as the load current increases. Electric double layer capacitors, or simply supercapacitors, have extremely low internal resistance, and a battery-supercapacitor hybrid may mitigate the rate capacity effect for high pulsed discharging current. However, a hybrid architecture comprising a simple parallel connection does not perform well when the supercapacitor capacity is small, which is a typical situation because of the low energy density and high cost of supercapacitors. This paper presents a new battery-supercapacitor hybrid system that employs a constant-current charger. The constant-current charger isolates the battery from supercapacitor to improve the end-to-end efficiency for energy from the battery to the load while accounting for the rate capacity effect of Li-ion batteries and the conversion efficiencies of the converters.

Original languageEnglish (US)
Title of host publicationProceedings -Design, Automation and Test in Europe, DATE
Pages875-878
Number of pages4
StatePublished - 2011
Externally publishedYes
Event14th Design, Automation and Test in Europe Conference and Exhibition, DATE 2011 - Grenoble, France
Duration: Mar 14 2011Mar 18 2011

Other

Other14th Design, Automation and Test in Europe Conference and Exhibition, DATE 2011
CountryFrance
CityGrenoble
Period3/14/113/18/11

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Shin, D., Kim, Y., Seo, J., Chang, N., Wang, Y., & Pedram, M. (2011). Battery-supercapacitor hybrid system for high-rate pulsed load applications. In Proceedings -Design, Automation and Test in Europe, DATE (pp. 875-878). [5763295]