A power supply control method and system based on vehicle state detection

Abstract

The invention discloses a method and a system for power supply control based on vehicle state detection. The method comprises: detecting a change trend of a voltage in real time, determining a vehicle state, analyzing a voltage value acquired within predetermined time, if detecting that the voltage is in a rising state, or greater than a preset maximum Vmax, determining that a vehicle engine is in a running state, and sending a command of enabling power supply to outside to a switch module, such that the switch module is closed to supply power to the outside; and if the voltage is in a dropping state, or smaller than a preset minimum Vmin, determining that the vehicle engine is in a stop state, and sending a command of disenabling power supply to outside to the switch module, such that the switch module is opened not to supply power to the outside. By means of the detection method provided by the present invention, the power is turned on automatically after ignition, and turned off after flameout, and therefore, the service life of an automobile battery is prolonged; the safety is improved, and convenience is brought for users.

Description

technical field [0001] The invention relates to the technical field of vehicle electronics, in particular to a power supply control method and system based on vehicle state detection. Background technique [0002] With the continuous improvement of people's living standards, the personal ownership of cars is increasing rapidly. There are also more and more electronic devices on the car, such as driving recorders, air purifiers and other devices. In order to facilitate users to install by themselves, most of them use cigarette lighter interfaces for power supply. In many vehicles, in order to facilitate users to use electronic equipment after the vehicle is turned off, the cigarette lighter interface will always provide power. Therefore, if the user does not turn off the electronic devices on the car in time after the engine is turned off, these devices will always consume the power of the vehicle battery. If parked for a long time, the battery power may be too low to start...

AI Technical Summary

Problems solved by technology

Therefore, if the user does not turn off the electronic devices on the car in time after the engine is turned off, these devices will always consume the power of the vehicle battery

If parked for a long time, the battery may be too low to start the vehicle

In addition, these electronic devices are prone to heat even if they work for a long time, which brings safety hazards such as self-ignition.

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