Partial-Power Converter Topology of Type II for Efficient Electric Vehicle Fast Charging

Sebastian Rivera, Julian Rojas, Samir Kouro, Peter W. Lehn, Ricardo Lizana, Hugues Renaudineau, Tomislav Dragicevic

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Abstract

The increasing power levels handled by electric vehicle dc fast chargers will impose additional challenges to the switching devices in order to cope with the efficiency requirements. A cost-effective alternative to achieve highly efficient power conversion is through the partial-power conversion concept. This paper validates the advantages of a step-down Type II partial-power converter (PPC), based on the phase-shifted fullbridge converter, for EV Fast Chargers. By exploiting the reduced voltage range of an EV battery pack along with the reduced power ratio for a Type II PPC, an extremely efficient charging process can be achieved. The concept is validated with the development of a 7 kW demonstrator, hence realistic efficiency measurements are obtained. Results indicate the effectiveness of charging a battery by merely handling 13.32% of the power provided to it, with a peak efficiency of 99.11%
Original languageEnglish
JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
Number of pages10
ISSN2168-6777
DOIs
Publication statusAccepted/In press - 2022

Keywords

  • Battery charging
  • DC-DC power conversion
  • Fast charger
  • High Efficiency
  • Partial-power converters (PPCs)

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