The demand for reducing charging intervals and operating losses in electric cars has resulted in the desire for higher battery pack voltage. Production of 800 V class vehicles is approaching the Combined Charging System (CCS) connector's 1 kV voltage limit. Modern fast-charging standards, such as Megawatt Charging System (MCS) and ChaoJi (CHAdeMO 3.0), have voltages of up to 1.25 kV and 1.5 kV, respectively. Charging these various next-generation high-voltage battery packs with existing EV battery chargers while maintaining high efficiency is a challenging task. This paper proposes a unique isolated bidirectional reconfigurable dual active bridge converter (r-DAB) for charging EV battery packs over a wide range of voltages. Phase-shifted switching signals are utilised on both the primary and secondary side bridges of the r-DAB converter in a manner that allows the secondary side bridge to be connected either in series or parallel. This configuration facilitates charging EV batteries across a wide voltage range (i.e., 150–1000 V) while ensuring high-efficiency performance. The effectiveness of the proposed r- DAB converter is evaluated using MATLAB/SIMULINK studies. The results demonstrate the excellent performance of the proposed r- DAB converter.
A Novel Isolated Bidirectional Reconfigurable DC-DC Converter with a Wide Output Voltage Range (150–1000 V) for Extreme EV Fast Charging Applications
31.07.2024
899717 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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