CPC H02M 3/33584 (2013.01) [B60L 53/20 (2019.02); B60L 58/20 (2019.02); H02M 1/0009 (2021.05); B60L 2210/12 (2013.01); B60L 2210/14 (2013.01); H02M 3/3353 (2013.01)] | 17 Claims |
1. A parallel interleaving operated bidirectional DC-DC converter which is a low voltage DC-DC converter (LDC) as a direct current power supply device for a vehicle, the converter comprising
two or more bidirectional DC-DC converters connected in parallel between a first battery and a second battery, a discharge voltage of the first battery being relatively higher than that of the second battery,
each of the bidirectional DC-DC converters connected in parallel includes:
a first current sensor configured to detect a current of a high voltage stage of each of the bidirectional DC-DC converters during the buck mode operation; and
a second current sensor configured to detect a current of a low voltage stage of each of the bidirectional DC-DC converters during a bidirectional operation,
wherein, among the bidirectional DC-DC converters, an interleaving operation is performed on switching of a power semiconductor included in one bidirectional DC-DC converter with respect to switching of power semiconductors included in other bidirectional DC-DC converters to perform a buck mode operation or a boost mode operation.
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