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.
Power supply switching device and method, vehicle-mounted terminal and vehicle
2015-08-19
Patent
Elektronische Ressource
Englisch
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
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