A method for automatic identification and protection of vehicle power supply

Abstract

The invention discloses an automatic recognition protection method for a vehicle power supply, and the method comprises the step: building a voltage-dividing detection circuit for the vehicle power supply, wherein the voltage-dividing detection circuit comprises a low-voltage sampling circuit, a high-voltage sampling circuit, a microprocessor, and a power output circuit. The low-voltage sampling circuit carries out the voltage dividing and sampling of the vehicle power supply, and outputs a sampling result to the microprocessor through a low-voltage detection end. The high-voltage sampling circuit carries out the voltage dividing and sampling of the vehicle power supply, and outputs a sampling result to the microprocessor through a high-voltage detection end. The microprocessor outputs a corresponding control signal for the management control of the output voltage of the power output circuit according to the output values and duration of the low-voltage detection end and the high-voltage detection end. The method achieves the automatic recognition of the current state of the vehicle power supply, achieves the adaption and management of a power system in a certain voltage drop range, and avoids the damages, caused by the continuous discharging of the vehicle power supply, to a device.

Description

technical field [0001] The invention relates to the technical field of automobile power supplies, in particular to a method for automatic identification and protection of vehicle power supplies. Background technique [0002] As the integration of vehicle equipment becomes higher and higher, the power consumption is higher and higher, and the consumption of battery power is higher and higher. At present, the vehicle power supply mainly includes two power supply systems, one is a 12V power supply system, and the other is a 24V power supply system. Some on-board equipment need to be powered by the battery after the vehicle is turned off, such as navigation on-board system, audio system, etc. When the vehicle is not used for a long time, the battery will continue to discharge. If there is no power identification protection circuit, the battery will be over-discharged, which may cause the vehicle to fail to ignite or cause battery damage and be scrapped. Moreover, at present, m...

AI Technical Summary

Problems solved by technology

When the vehicle is not used for a long time, the battery will continue to discharge. If there is no power identification protection circuit, the battery will be over-discharged, which may cause the vehicle to fail to ignite or cause the battery to be damaged and scrapped.

Moreover, at present, more and more OEM (Original Equipment Manufacturer, original equipment manufacturing) car factories use the start-stop function, but the existing technology does not adapt and manage the vehicle power system, and is compatible with the car start-stop function

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