CPC B60L 53/22 (2019.02) [H02J 7/0013 (2013.01); H02M 3/33576 (2013.01); B60L 2210/30 (2013.01); B60L 2210/40 (2013.01); H02J 2207/20 (2020.01)] | 3 Claims |
1. A method of controlling charge of a vehicle battery, the method comprising:
determining, by a control unit, whether a high voltage battery and a low voltage battery are charged in a first charging mode, a second charging mode, or a third charging mode;
charging at least one of the high voltage battery or the low voltage battery by controlling a first full-bridge circuit unit, a second full-bridge circuit unit, and a low voltage direct current (DC) converter unit based on the determined first, second or third charging mode;
when the first charging mode is determined, controlling, by the control unit, a switching frequency of first to eighth switching elements;
activating, by the control unit, the first to eighth switching elements to charge the high voltage battery; and
charging the low voltage battery by turning on a ninth switching element to smooth a voltage which is full-wave rectified by a rectifying unit through a second capacitor and controlling a switching frequency of a tenth switching element to vary the smoothed voltage.
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