纯电动商用车绝缘检测方法及故障分析

Insulation Detection Method and Fault Analysis of Battery Electric Commercial Vehicle

纯电动商用车的工作环境存在路况复杂、工况恶劣等情况,导致整车电气设备的磨损速率加快,造成电气设备绝缘电阻持续下降,如不及时处理,可能存在安全隐患或引发重大安全事故。文章从绝缘故障检测原理出发,分析和探讨一种绝缘检测定位技术的应用,将一套包括绝缘检测仪、电流发射器、电流互感器和绝缘故障定位仪组成的低压信号传输系统,连接并安装在整车的各组高压回路。通过该系统电流信号的实时传输,快速准确定位故障回路,锁定故障位置。此技术为售后市场绝缘故障车辆的排查提供一种快速、高效、精准的解决方案。

The working condition of battery electric commercial vehicle has complex road conditions and harsh working conditions,which leads to the acceleration of the wear rate of the vehicle electrical equipment,resulting in the continuous decline of the insulation resistance of the electrical equipment,and if not handled in time,there may be safety hazards or cause major safety accidents.Based on the principle of insulation fault detection,this paper analyzes and explores the application of an insulation detection and positioning technology,and a set of low-voltage signal transmission system consisting of insulation detector,current transmitter,current transformer and insulation fault locator is connected and installed in each high-voltage circuit of the vehicle.Through the real-time transmission of the system current signal,the fault loop is quickly and accurately located and the fault location is locked.This technology provides a fast,efficient and accurate solution for the investigation of faulty vehicles in the aftermarket.