Intelligent vehicle-mounted high-voltage power distribution management unit for electric vehicle

Abstract

The invention discloses an intelligent vehicle-mounted high-voltage power distribution management unit for an electric vehicle. A high-voltage power supply of the intelligent vehicle-mounted high-voltage power distribution management unit is input by an anode of a power battery pack; high-voltage current enters high-voltage equipment externally connected with an anode of an output port of a high-voltage circuit after a normally open contact of a high-voltage direct current contactor KM2 is connected with a pre-charge resistor R1; a cathode of the output port of the high-voltage circuit is connected with a cathode of the power battery pack; a normally open contact of a high-voltage direct current contactor KM3 is connected in parallel with the cathode of the power battery pack and the rear end of the normally open contact of the high-voltage direct current contactor KM2 after being connected in series with a discharge resistor R2; both ends of a normally open contact of a high-voltage direct current contactor KM1 are respectively connected onto the input end of the anode of the power battery pack and the anode of the output port of the high-voltage circuit; both ends of a normally open contact of a high-voltage direct current contactor KM4 are respectively connected onto the input end of the anode of the power battery pack and an anode of an input port of an external charging set; a complete vehicle controller is used for controlling the high-voltage direct current contactors KM1, KM2, KM3 and KM4 to be switched on and off; and a power distribution unit (PDU) controller is connected with the complete vehicle controller and other peripheral equipment through controller area network (CAN1) wires.

Description

technical field [0001] The invention relates to an intelligent vehicle-mounted high-voltage power distribution management system for an electric vehicle. Background technique [0002] New energy commercial vehicles, such as pure electric, hybrid, and fuel cells, usually use a large number of power battery (such as lithium-ion battery) modules in groups as the power storage module of the vehicle, which is called a power battery module, and is composed of power batteries The module provides a source of power for the drive motor, thereby achieving the purpose of replacing traditional gasoline, diesel or saving fuel. [0003] In traditional vehicles, DC 12V (for passenger cars), DC 24V (for commercial vehicles) and other low-voltage power supplies (power supply voltage less than DC 60V) are mainly used as power supplies for vehicle-mounted electrical equipment, and have relatively complete Power distribution management and control functions and modules, called Body Control ...

AI Technical Summary

Problems solved by technology

Chinese patent 201110086132.2 discloses a high-voltage distribution box for pure electric commercial vehicles. Although the distribution box is aimed at pure electric commercial vehicles, the patent only includes the input and output actuators of high-voltage power supplies, insulation monitoring, energy display and some In terms of the safety and basic functions of electric vehicles, there is still a lack of functional design such as external charging interface, pre-charging and rapid discharge; there is also a lack of high-voltage interlock function, which is listed in SAE J2344 "GUILELINES FOR ELECTRIC VEHICLE SAFETY" There are mandatory requirements; the patent also lacks design considerations for high-voltage emergency disconnection, etc.

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