TY - GEN
T1 - Battery-supercapacitor hybrid system for high-rate pulsed load applications
AU - Shin, Donghwa
AU - Kim, Younghyun
AU - Seo, Jaeam
AU - Chang, Naehyuck
AU - Wang, Yanzhi
AU - Pedram, Massoud
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:79957544849
SN - 9783981080179
T3 - Proceedings -Design, Automation and Test in Europe, DATE
SP - 875
EP - 878
BT - Proceedings - Design, Automation and Test in Europe Conference and Exhibition, DATE 2011
T2 - 14th Design, Automation and Test in Europe Conference and Exhibition, DATE 2011
Y2 - 14 March 2011 through 18 March 2011
ER -