The invention discloses a power supply switching device and method, a vehicle-mounted terminal and a vehicle. The power supply switching device comprises a micro-processor, a voltage switching module and a first DC/DC module, wherein the micro-processor is used for detecting the voltage range of a storage battery of the vehicle and controlling the voltage switching module according to the voltage range value of the storage battery of the vehicle, which is obtained through detection; the voltage switching module regulates the voltage supplied by the storage battery of the vehicle to the first DC/DC module according to the voltage range of the storage battery of the vehicle, under the control of the micro-processor, and sets a low-voltage threshold of the first DC/DC module obtaining voltage from the storage battery of the vehicle; the first DC/DC module obtains voltage from the storage battery of the vehicle under the regulation of the voltage switching module, switches the obtained voltage, and supplies a working voltage to the micro-processor and the parts of the vehicle-mounted terminal. The power supply switching device and method, disclosed by the invention solve the problem that the matching of the power supply of the existing vehicle-mounted terminal is complicated, the application range of the vehicle-mounted terminal is enlarged, and mounting efficiency of the vehicle-mounted terminal is improved.


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    Title :

    Power supply switching device and method, vehicle-mounted terminal and vehicle


    Contributors:
    HE LEI (author) / GE WENQI (author) / HU JUN (author) / FENG ZHIXUE (author) / GAO PENG (author) / SONG YUXUAN (author)

    Publication date :

    2015-08-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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