Design and Implementation of a High-Efficiency On-
Board Battery Charger for Electric Vehicles with
Frequency Control Strategy
Jong-Soo Kim, Gyu-Yeong Choe, Hye-Man Jung, Byoung-Kuk Lee
Information and Communication Engineering
SungKyunKwan University
Suwon, Korea
sniper75@skku.edu, lovesagaji@skku.edu,
jungicarus@skku.edu, bkleeskku@skku.edu
Young-Jin Cho, Kyu-Bum Han
EVT Group, R&D Center
Samsung Electro-Mechanics
Suwon, Korea
yj1996.cho@samsung.com
Abstract— This paper presents a design and implementation of
3.3 kW on-board battery charger for electric vehicles or plug-in
hybrid electric vehicles. A series-loaded resonant dc-dc converter
and frequency control are adopted in consideration of efficiency,
reliability, volume, cost, and so on. In order to obtain high
efficiency and less volume within 6 liters, a prototype of the
charger is designed and implemented by using high frequency of
80-130kHz and zero voltage switching method. The experimental
result indicates 93% of the maximum efficiency and 5.84 liters in
volume of the developed 3.3 kW on-board battery charger.
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