High-voltage distribution box based on vehicle-mounted CAN bus network

Abstract

The invention relates to a high-voltage distribution box based on a vehicle-mounted CAN bus network. The high-voltage distribution box comprises a high-voltage distribution box body, a high-voltage power supply part and a low-voltage control part, wherein the high-voltage distribution box body comprises a high-voltage distribution box housing and an insulating terminal; the high-voltage power supply part comprises a high-voltage connector socket, a copper bar, contactors, a pre-charge resistor, fuses, a maintenance switch and a high-voltage interface; the low-voltage control part comprises a low-voltage wire harness, a high-voltage distribution box control panel and a low-voltage interface. The high-voltage distribution box has the following superior effects: communication with a vehicle control unit is realized by a CAN bus, so that opening/closing of the contactors can be directly controlled; the CAN bus is excellent in anti-interference performance and stability and high in transmission rate; the high-voltage distribution box has the functions of low-voltage protection, overcurrent protection, starting current limitation, insulating detection, switch maintenance, fault code diagnosis, CAN communication and the like, effectively guarantees the vehicle and personal security and ensures normal running of the vehicles.

Description

technical field [0001] The invention relates to a high-voltage power distribution box based on a vehicle-mounted CAN bus network, in particular to a high-voltage power distribution device on a new energy vehicle that provides high-voltage power for vehicle equipment. Background technique [0002] With the promotion and development of electric vehicle technology, its safety issues are becoming more and more important. The biggest difference between electric vehicles and fuel vehicles is that they use direct current with a very high voltage, which will cause great safety hazards to the human body. Therefore, we must control the on-off of high voltage reasonably and scientifically, and disconnect the high voltage immediately when a failure occurs. Avoid direct contact between the human body and high-voltage electricity, and reduce the damage of high voltage to the human body. In addition, because of the high security and stability of the CAN bus, the CAN bus network is becomin...

AI Technical Summary

Problems solved by technology

[0003] The wiring of the high-voltage power distribution box directly controlled by hard wires is complicated. Each control of a relay or contactor requires a wire, so a large number of wire harnesses are required. Not only is it inconvenient to arrange the wire harnesses, but also with the increase of wires, appear The higher the possibility of problems, the more difficult it is to troubleshoot faults, and the more troublesome it is to replace and adjust the high-voltage power distribution box

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