Vehicle lamp power supply management system and method, vehicle lamp system and vehicle

Abstract

The invention relates to vehicle lamp power supply management, and discloses a vehicle lamp power supply management system, which comprises a control unit and a power supply switch connected between each functional lamp and the control unit, the input end of each power supply switch is connected to the power end of the corresponding function lamp, the output end is connected to the power end of the control unit, and the control end is connected to the output port of the control unit; the power supply end of each functional lamp is connected to one input port of the control unit, and the fault state signal of each functional lamp is connected to one input port of the control unit; and the control unit is suitable for controlling the on-off of each power supply switch according to the combination of each power-on state signal and each fault state signal, so that the current flowing through any function lamp in the fault state is smaller than or equal to an alarm current set value. The invention further discloses a vehicle lamp power management method, a vehicle lamp system and a vehicle. The vehicle lamp power supply management system can give an alarm to a vehicle body in time when a failed functional lamp is used, so that the driving safety is ensured.

Description

technical field [0001] The present invention relates to the management of vehicle lamp power supply, in particular to a vehicle lamp power supply management system. In addition, the invention also relates to a vehicle light power management method, a vehicle light system and a vehicle. Background technique [0002] In LED car lights, when the fault diagnosis method used is current diagnosis, and each functional lamp is powered by a hard wire, at this time, it is more cost-effective to share multiple functional lamps with one micro control unit (MCU). [0003] However, the standard for diagnosing car lamp faults through current is to diagnose whether the functional lamp is in a normal state or a fault state through the current level. For example, the diagnostic current in the normal state can be set to greater than 80mA, and the diagnostic current in the fault state can be set to is less than 5mA. However, when the MCU is working normally, there is a continuous current. Whe...

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Problems solved by technology

However, when the MCU is working normally, there is a continuous current. When multiple functional lights work at the same time and more than one functional light fails, these multiple functional lights may have a problem of grabbing current, which may lead to failure of the malfunctioning function. The current is higher than the pre-set diagnostic current of the fault state, so that the vehicle body cannot be alarmed in time, and the user cannot detect the lamp failure in time, which affects the driving safety of the vehicle

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