Lg Electronics Inc.

Sun Yong Kim

Mee Yeon Choi

Hye Sang Ahn

Won Jin Oh

Jun Sic Park

Byoung Nam Lee

The present invention relates to an electric vehicle, and to a method for managing the charging of an auxiliary battery for an electric vehicle. The electric vehicle according to the present invention comprises: a high voltage battery for driving the electric vehicle; an auxiliary battery for supplying a plurality of electronic loads with driving power; a converter converting the voltage of the high voltage battery to a voltage required by the electronic loads via PWM switching; and a current detection unit for detecting the output current of the converter wherein the converter includes a converter control unit for reducing the output voltage of the converter when the energy required by the loads, based on the current detected by the current detection unit, is greater than the rated capacity of the converter. Accordingly, energy supplied to the loads can be handled by the converter and the auxiliary battery so as to enable the safe operation of an electric vehicle system.

Battery management apparatus for an electric vehicle, and method for managing same

The present invention relates to an electric vehicle and a charging control method for an auxiliary battery of the electric vehicle. According to the present invention, the electric vehicle comprises: a high-voltage battery which drives the electric vehicle; a plurality of electric field loads; the auxiliary battery which supplies driving power to the plurality of electric field loads; a first voltage detection unit which detects an output voltage of an auxiliary battery side; a converter which performs a PWM switching to convert the voltage of the high-voltage battery into a voltage required in the electric field loads; a plurality of relays; a power relay assembly (PRA) which is switched to supply the energy of the high-voltage battery to the converter according to whether or not the plurality of relays are in operation; and a vehicle control module (VCM) which controls the driving of the power relay assembly, wherein the converter includes a converter control unit, which sends a driving instruction signal requesting the vehicle control module to drive the power relay assembly depending on a magnitude change of the output voltage of the auxiliary battery side. Accordingly, discharging of the auxiliary battery in a starting-off state is prevented, which makes it possible to stably operate the electric vehicle system.

Electric vehicle and charging control method for auxiliary battery thereof

Cellular phone with a dynamic display on the screen thereof

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Goyang-si, South Korea

Sun Yong Kim