The invention relates to a power shortage prevention system for an electric vehicle accumulator jar. The system comprises the accumulator jar, a power battery, a vehicle control unit, a battery management system, an accumulator jar energy management controller, a current sensor and a DC-to-DC power supply exchanger, wherein the DC-to-DC power supply exchanger is respectively connected with the power battery and the accumulator jar; the converter is used for converting the voltage output by the power battery into the voltage required by the accumulator jar; the current sensor is arranged on a loop of the accumulator jar and the DC-to-DC power supply exchanger; the accumulator jar energy management controller is respectively connected with the current sensor and the vehicle control unit andreceives the current detected by the current sensor in real time so as to judge the residual electric quantity of the accumulator jar, and when the residual electric quantity is lower than a set safety threshold value, the accumulator jar energy management controller outputs a high-level signal to wake up the vehicle control unit; and the vehicle control unit sends a charging starting instructionto the DC-to-DC power supply exchanger, and charging is stopped when the residual electric quantity of the storage battery reaches a rated value.

    本发明涉及一种电动汽车蓄电瓶防亏电系统,包括:蓄电瓶、动力电池、整车控制器、电池管理系统,蓄电瓶能量管理控制器、电流传感器、直流转直流电源交换器;其中,直流转直流电源交换器分别与动力电池与蓄电瓶相连,用于将动力电池输出的电压转换为蓄电瓶所需的电压,电流传感器安装在蓄电瓶与直流转直流电源交换器的回路上,蓄电瓶能量管理控制器分别与电流传感器与整车控制器相连,并实时接收电流传感器检测到的电流,从而判断蓄电瓶的剩余电量,当剩余电量低于设定的安全阈值时,其输出高电平信号唤醒整车控制器;整车控制器向直流转直流电源交换器发送启动充电指令,当蓄电瓶剩余电量达到额定值时,则停止充电。


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    Title :

    Power shortage prevention system for electric vehicle accumulator jar


    Additional title:

    一种电动汽车蓄电瓶防亏电系统


    Contributors:
    CAO DONGMEI (author) / SU JUAN (author)

    Publication date :

    2020-06-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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