High-voltage double-loop safety system of electric vehicle and method thereof

Abstract

The present invention discloses a high-voltage double-loop safety system of electric vehicle and a method thereof. The high-voltage double-loop safety system of electric vehicle comprises a hardwired control loop which is composed of a VMS vehicle controller, a motor controller assembly, a driving motor and a high-voltage power battery pack assembly through hardwired connection in series, a VMS vehicle controller which is connected in parallel in the vehicle CAN network, and a communication network control loop composed of an MCU control plate in the motor controller assembly and a BMS battery management system in the high-voltage power battery pack assembly. The control method of the invention mainly determines whether the power battery outputs high-voltage electricity through the self testing of each control system and the safety information interaction checking of CAN communication network. The high-voltage double-loop safety system of electric vehicle according to the invention can reliably realize the purpose of protection of electric vehicle or the high-voltage electric device and high-voltage power transmission line in a hybrid power vehicle and the operator safety. The safety and reliability of high-voltage electricity can be greatly increased.

Description

technical field [0001] The present invention relates to a high-voltage safety protection system used as a power system in an electric vehicle, and more specifically relates to a high-voltage safety protection system for an electric vehicle composed of a high-voltage safety hard wire control loop and a high-voltage safety network control loop. The protection system realizes the purpose of handling the high-voltage safety fault of the electric vehicle and protecting personnel. Background technique [0002] With the shortage of global oil resources and the increasingly serious environmental pollution, various energy-saving and environmentally friendly new energy vehicles are emerging, especially electric vehicles and hybrid vehicles are getting more and more attention and favor, which is mainly due to the new Advances and breakthroughs in energy, new materials, high-performance microprocessor technology, and large-capacity power battery technology have given people a new unders...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, in order to realize high-voltage protection in electric or hybrid vehicles, a simple switch loop system is usually used to detect the insulation resistance between the high-voltage system and the vehicle chassis during the running of the vehicle. The insulation state of the high-voltage system. Although this monitoring device can achieve a certain high-voltage safety protection function, its reliability and stability are poor. After a long-term use of the automotive monitoring circuit system, the safety protection function will be unstable.

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