Hyundai Motor Company

Kia Motors Corporation

Jeeheon Kim

Jun Yeon Park

Hojoong Lee

Youngjin Jang

Hyun Wook Seong

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.

Method and apparatus for charging auxiliary battery of vehicle including driving motor

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.

Growing community of inventors

Guri-si, South Korea

Jeeheon Kim