Abstract: The present invention relates to a method and an apparatus for charging an auxiliary battery of a vehicle including a driving motor. According to an exemplary embodiment of the present invention, an apparatus for charging an auxiliary battery of a vehicle including a driving motor, includes: a driving distance detector detecting a driving distance of the vehicle; a timer detecting time lapsing from a specific time; a main battery SOC detector detecting a state of charge (SOC) of a main battery; an auxiliary battery SOC detector detecting an SOC of the auxiliary battery; and a controller operated by a program set to control an operation of a DC converter based on signals of the driving distance detector, the timer, the main battery SOC detector, and the auxiliary battery SOC detector.

Abstract: A method for controlling an output of an LDC in an environmentally friendly vehicle is provided. The method includes determining whether the vehicle travels in the regenerative braking mode and when the vehicle does, transmitting a first slope signal to the LDC to increase an output voltage of the LDC that charges or discharges an auxiliary battery supplying power to an electric load using a high voltage battery. The first slope signal determines an upward slope of the output voltage of the LDC according to time as a first slope. When the vehicle does not travel in the regenerative braking mode and uses a high power electric load a second slope signal is transmitted to the LDC to increase the output voltage of the LDC. The second slope signal determines the upward slope as the second slope having a slope less than the first slope.

Abstract: The present invention relates to a method and an apparatus for charging an auxiliary battery of a vehicle including a driving motor. According to an exemplary embodiment of the present invention, an apparatus for charging an auxiliary battery of a vehicle including a driving motor, includes: a driving distance detector detecting a driving distance of the vehicle; a timer detecting time lapsing from a specific time; a main battery SOC detector detecting a state of charge (SOC) of a main battery; an auxiliary battery SOC detector detecting an SOC of the auxiliary battery; and a controller operated by a program set to control an operation of a DC converter based on signals of the driving distance detector, the timer, the main battery SOC detector, and the auxiliary battery SOC detector.

Abstract: A method for controlling an output of an LDC in an environmentally friendly vehicle is provided. The method includes determining whether the vehicle travels in the regenerative braking mode and when the vehicle does, transmitting a first slope signal to the LDC to increase an output voltage of the LDC that charges or discharges an auxiliary battery supplying power to an electric load using a high voltage battery. The first slope signal determines an upward slope of the output voltage of the LDC according to time as a first slope. When the vehicle does not travel in the regenerative braking mode and uses a high power electric load a second slope signal is transmitted to the LDC to increase the output voltage of the LDC. The second slope signal determines the upward slope as the second slope having a slope less than the first slope.

Abstract: A charging method for a vehicle is provided that includes receiving, by a controller, a control pilot (CP) signal from electric vehicle supply equipment (EVSE) and smoothing the CP signal using a duty ratio of the CP signal. In addition, the controller is configured to compensate the smoothed CP signal and determine whether the compensated CP signal is within a predetermined range. The vehicle battery is then charged when the compensated CP signal is within the predetermined range.