본 발명은 전기자동차 및 전기자동차 보조배터리의 충전제어방법에 관한 것이다. 본 발명에 따른 전기자동차는, 전기자동차를 구동하는 고압배터리와 복수개의 전장 부하 및 복수개의 전장 부하에 구동전원을 공급하는 보조배터리와 보조배터리측의 출력 전압을 검출하는 제 1전압검출부와, PWM스위칭을 수행하여 고압배터리의 전압을 전장 부하에서 요구되는 전압으로 변환하는 컨버터와, 복수의 릴레이를 포함하고, 복수의 릴레이의 동작여부에 따라 고압배터리의 에너지가 컨버터에 공급되도록 스위칭하는 전력릴레이부(PRA:Power Relay Assembly)와, 전력릴레이부의 구동을 제어하는 차량제어부(VCM:Vehicle Control Module);를 포함하고, 컨버터는, 보조배터리측의 출력전압 크기변화에 따라 차량제어부로 전력릴레이부의 구동을 요청하는 구동명령신호를 보내는 컨버터제어부를 포함한다. 이에 의해, 시동오프상태에서 보조배터리의 방전을 방지함으로써, 전기자동차 시스템의 운전을 안정적으로 수행할 수 있다.

    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.


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    Title :

    .Electric vehicles and method for sub-battery charging control thereof


    Additional title:

    전기자동차 및 그 보조배터리의 충전제어방법.


    Publication date :

    2016-05-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung




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