Active control system for low DC/DC converter in an electric vehicle

An active control system for a LDC (Low-voltage DC/DC Converter) in a vehicle, comprising:

• a low voltage battery;
• a high voltage battery;
• a LDC disposed between the high voltage battery and the low voltage battery and configured to increase and decrease a voltage applied thereto in two different directions including a full speed charging mode and a LDC active control mode;
• and
• a VCU (Vehicle Control Unit) configured to control the LDC, wherein the VCU monitors a charging time of the low voltage battery, and waits to initiate the LDC active control mode until the low voltage battery has been charging longer than a first reference time of the full speed charging mode unless a reliable battery SOC (state of charge) of the low voltage battery is obtained,
• wherein the VCU is configured to decrease an output of the LDC output voltage after an initial charging time of the low voltage battery for an over charge protection of the low voltage battery applied when charging the high voltage battery, and
• wherein the low voltage battery is charged with the LDC output voltage based on a voltage table related to driving information and the voltage table is previously programmed by a non-transitory computer readable medium and stored in a memory of the VCU.