Indian Journal of Science and Technology

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This paper presents a new parallel output LLC DC/DC converter for electric vehicle. There are a high voltage battery for the power train of the vehicle and a low voltage battery for the vehicle electric system in the electric vehicle. The new LLC converter with the input voltage compensation is proposed for the high voltage input and the low voltage output DC/DC converter to charge the low voltage battery from the high voltage battery. The proposed circuit has two LLC converters with the series input voltage from the battery for the power train and the parallel output low battery voltage for the vehicle electric system. Also, the input series voltage compensation capacitor is used for balancing the input current in the two LLC converters. The proposed converter has an equal electric stress of the semiconductor parts and the reactive components, high efficiency and good heat dissipation. Features of the proposed circuit are verified with a simulation result.

Keywords

Electric Vehicle, High Voltage Battery, Input Voltage Balancing, Low Voltage Battery, LLC DC/DC Converter.
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