Control method and system for discharging of vehicle high-voltage system

Abstract

The invention provides a control method and system for discharging of a vehicle high-voltage system, and relates to the control field. The control method is used for achieving discharging of energy ofthe vehicle high-voltage system, and comprises the steps of sending a power outage instruction, disconnecting a relay according to the power outage instruction, recording the voltage difference of the two ends of the relay and calculating the disconnecting time of the relay, sending the disconnecting instruction of the relay, receiving the disconnecting instruction of the relay and enabling the high-voltage system to actively discharge, and comparing the discharging difference of the two ends of the relay with a preset voltage value to determine whether the high-voltage system discharges successfully or not. The control system comprises a vehicle controller, a battery management system and a motor controller. The control method and system for discharging of the vehicle high-voltage systemsolve the energy discharging problem of the vehicle high-voltage system.

Description

technical field [0001] The invention relates to the technical field of control, in particular to a control method and a control system for discharging a high-voltage system of a vehicle. Background technique [0002] With the reduction of fossil fuels and the intensification of environmental pollution, new energy vehicles are becoming more and more sought after by the society, and the subsequent safety issues have also attracted consumers' attention. The main safety issue of new energy vehicles is the safety of high-voltage systems - batteries, motors. When designing a motor controller, in order to ensure its overall performance, there will be a large number of high-voltage capacitors inside. These capacitors have a high voltage level and a large capacity. There are serious potential safety hazards for the whole vehicle, especially in the process of vehicle maintenance and repair, the safety problem of the high-voltage system is very prominent. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0004] Another purpose of the present invention is to solve the traditional problem that there is a large amount of energy in the high-voltage system that threatens the users in the car by directly cutting off the power without performing high-voltage release.

[0005] A further object of the present invention is to solve the problem of insufficient safety in the prior art only through high-voltage passive discharge

Images