Intelligent management system and method of automobile power supply

Abstract

The invention relates to the technical field of automotive electronic control. An intelligent management system of an automobile power supply comprises an MCU (Microprocessor), a power supply processing circuit, a plurality of intelligent power controlled circuits, a temperature monitoring unit and a CAN (Controller Area Network) communication unit, wherein an input end of the power supply processing circuit is connected to a storage battery and an engine power supply; an output end of the power supply processing circuit is connected to the MCU; input ends of the intelligent power controlled circuits are connected to the storage battery, the engine power supply and the MCU; output ends of the intelligent power controlled circuits are connected to a power supply end of an automobile externally connected ECU (Electronic Control Unit); the circuits are used for detecting current and voltage of the storage battery and the engine power supply, simultaneously receiving a control signal of the MCU, and adjusting power output according to the control signal so as to output a plurality of paths of controlled output and constant-voltage output; the temperature monitoring unit is arranged on heating areas of a storage battery bin and an engine bin; an output end of the temperature monitoring unit is connected to the MCU; and a signal end of the CAN communication unit is connected with the automobile externally connected ECU and the MCU. The intelligent management system of the automobile power supply is applicable to automobiles applying the CAN bus technology.

Description

technical field [0001] The invention relates to the technical field of automotive electronic control, in particular to an intelligent management system and method for a vehicle power supply, which is suitable for vehicles applying CAN bus technology. Background technique [0002] At present, with the development of automotive electronic systems, CAN bus (Controller Area Network-BUS, controller area network bus) technology has been widely used in passenger cars. The distributed modular control of CAN bus makes the wiring harness on the car simple, and at the same time The number of ECU (Electronic Control Unit, electronic control unit) units on the Internet is increasing, and each ECU unit needs a stable power supply, and also needs to have protection functions, such as over-current, over-voltage and short-circuit protection. [0003] Due to the increase in the number of ECU units, the power supply conditions of each unit are different: for example, some ECU units need to del...

AI Technical Summary

Problems solved by technology

However, in this patent, multiple relays are mainly used to detect the current of each power supply line, and the circuit is complex; and the coordination of multiple smart relays is difficult to control, which greatly affects the stability of the entire system; in addition, the The patent does not monitor and protect the start control, neutral and emergency start of the engine, which still has great potential safety hazards

Due to the relatively low reliability of relays in the case of high-current control, the self-recovery fuse is sensitive to temperature, and it is difficult to adapt to the automotive environment and high-current control; especially for vehicle power control, its safety and reliability cannot be guaranteed.

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