新能源汽车高压系统电路故障诊断与安全维修策略

中图分类号：U469.72 文献标识码：B 文章编号：1003-8639（2026）03-0187-03

Circuit Fault Diagnosis and Safe Maintenance Strategies for High-voltage Systems of New Energy Vehicles

Hu Zongwang (Nanning No.3 Vocational Technical School,Nanning 53oooo, China)

【Abstract】Faults in the high-voltage system of new energy vehicles are prone to causing safety accdents. Existing maintenance technologies mostly relyon experience and lack systematic solutions.This paper innovatively proposes a dynamicinsulationmonitoringmethodintegrating "ACsignalinjection+non-contactelectricfielddetection",adiagnostic system combining multimodal time-frequencyanalysis and 3-layer CNN,and establishes a standardized maintenance processReal-vehiclecasesachieved zero electric shock during maintenance,providing asolutionfor high-voltage system diagnosis and also offering a reference for the standardization of industry interfaces.

【Key words】new energy vehicles；high-voltage system;fault diagnosis；safety maintenance;insulation monitoring

0 引言

当前新能源汽车保有量持续攀升，高压系统（电压通常 ≥60V ）作为动力传输与控制的核心部件，其绝缘失效、预充电异常等故障易引发触电、短路起火等安全事故，严重威胁乘员人身安全与车辆运行可靠性。（剩余5137字）