The present invention relates to an apparatus and a method for preventing discharge of an auxiliary battery, which are capable of automatically charging an auxiliary battery by waking up an upper level controller, when an auxiliary battery charge amount is sensed in a vehicle (hybrid vehicle, plug-in hybrid vehicle, or pure electric vehicle) having a high voltage battery and an auxiliary battery in a vehicle key-off state and the auxiliary battery charge amount becomes a predetermined level or less. The apparatus of the present invention comprises: a charge amount monitoring unit for sensing a charge amount of an auxiliary battery when a start key is in an off state, and generating a wake-up command when the charge time of the auxiliary battery arrives; and a vehicle controller for automatically starting the high voltage battery and the power converter by performing starting according to the wake-up command generated by the charge amount monitoring unit. The power converter charges the auxiliary battery with a supply voltage of the high voltage battery when the power converter is woken up by the vehicle controller in a start key-off state.
고전압 배터리와 보조배터리를 구비한 차량(하이브리드차, 플러그인 하이브리드차, 순수 전기차)에서 차량 키-오프 상태에서 보조배터리 충전량을 감지하여 일정 레벨 이하가 되면 상위 제어기를 웨이크-업(wake-up)시켜 자동으로 보조배터리를 충전할 수 있도록 한 보조배터리의 방전 방지장치 및 그 방법에 관한 것으로서, 시동 키가 오프 상태이면 보조배터리의 충전량을 감지하고, 보조배터리 충전 시점이 되면 웨이크-업 명령을 발생하는 충전량 감시부, 충전량 감시부에서 발생한 웨이크-업 명령에 따라 기동하여, 고전압 배터리 및 전력변환기를 자동으로 기동시키는 차량 제어기를 포함하여 보조배터리의 방전 방지장치를 구현하고, 전력 변환기는 시동키 오프 상태에서 차량 제어기에 의해 웨이크-업되면 고전압 배터리의 공급 전압으로 보조배터리를 충전한다.
Discharge preventing device and method of auxiliary battery
보조배터리의 방전 방지방법
2018-05-30
Patent
Electronic Resource
Korean
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |
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