荣威Ei5电池管理系统通信故障维修

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中图分类号：U463.63 文献标识码：B 文章编号：1003-8639（2026）01-0186-02

Maintenance of Communication Failure in the Battery Management System of Rongwei Ei5

Dong Quanyou

(LiaoningPetrochemical College,Jinzhou 121o01, China)

【Abstract 】This article focuses on the communication system architecture of the Batery Management System(BMS) of Rongwei Ei5,analyzes thecorefaultcausesofthecircuit,hardware,and software,andsummarizes the standardized process of "initial inspection $$ layered detection $$ precise repair". Combined with typical cases,it provides maintenanceplansand suggestions forthediagnosisandrepairofcommunication failures,offering practical technical references for the troubleshooting of communication failures of this model.

【Key words】Rongwei Ei5;BMS；communication failure;diagnosis and repair;high voltage safety

BMS通信故障核心原因分析

BMS通信故障的核心原因包括： ① 线路层面，CAN总线易因磨损断路、采集排线绝缘老化，接插件受环境影响氧化进水，线束卡扣松动破坏传输特性；② 硬件层面，电池管理单元（BatteryManagementUnit，BMU）芯片、传感器及 120Ω 终端电阻故障，车载充电机（ 0n -BoardCharger，OBC）通信接口损坏影响交互；软件层面，固件兼容问题、编码错误、升级失败及协议漏洞引发异常；电磁干扰与极端温湿度会导致信号失真、元件性能衰减；充电桩协议不兼容、电池传感器单元（BatterySensorUnit，BSU）地址重复会造成通信协商失败或总线拥堵。（剩余3173字）