High-voltage safety precaution control method of hybrid electric vehicle

Abstract

The invention relates to a high-voltage safety precaution control method for a hybrid electric vehicle. The high-voltage safety precaution control method comprises the following steps: carrying out detection and fault handling based on the states of vehicles, i.e., respectively carrying out direct current and alternating current insulation monitoring in a parking process, a power-on process, a running process and a power-off process so as to improve the safety performance of the vehicle. The method has the following beneficial effects: the insulating resistance value of a high-voltage bus is detected in real time so as to determine whether the insulating state of the high-voltage bus meets the technical requirement of vehicle running, once the insulating resistance value of a high-voltage bus exceeds a prescribed limit, a system can give out an alarm and adopt corresponding measures to restrict or prevent normal operation of the vehicle in time.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to a high-voltage safety prevention control method for hybrid electric vehicles. Background technique [0002] With the increasing international attention to energy security and environmental protection issues, countries have become more and more strict on vehicle emissions. Reducing dependence on energy and realizing energy conservation and emission reduction has become an urgent problem to be solved for the sustainable development of the world economy. Hybrid vehicles and pure electric vehicles have become the development trend of today's automobile industry. Gasoline-electric hybrid vehicles combine the motor and the engine to achieve reasonable energy-saving and emission-reduction effects for various working conditions. Hybrid functions such as idling stop, motor starting, intelligent charging, regenerative braking, motor assist, and electric crawling, etc., ha...

AI Technical Summary

Problems solved by technology

[0003] The main components of hybrid electric vehicles include power batteries, motors, generators, DC buses, etc. These components will involve high-voltage electrical insulation problems, and the working conditions of the components are relatively harsh. Changes in vibration, temperature and humidity may cause power failure. Cables and other insulating materials are rapidly aging or even damaged, which greatly reduces the insulation strength, which will not only endanger the personal safety of drivers and passengers, but also affect the normal operation of low-voltage electrical appliances and vehicle controllers

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