新能源汽车三电系统功能安全技术要点分析

中图分类号：U469.72 文献标识码：A 文章编号：1003-8639（2025）06-0021-0：

AnalysisofKey TechnicalPointsforFunctional Safetyofthe Three-electricity SystemsinNewEnergyVehicles

Zhang Zhiguo

（NIO Automotive Technology（Anhui）Co.，Ltd.，Hefei 230031，China）

【Abstract】With the development of new energy vehiclesand the implementation of thenational standard GB/T 34590—2024，this article focuses on the functional safetyof the three-electricity systemand uses HAZOP and FMEA to clarifythefailuremodesandASILsafetyobjectives.Intermsofhardware，thebatteryadoptshigh-precisionsensorsand multi-layer protection.The motorand electroniccontrol implementredundancyof keycomponentsandadopta "dual power supply + dual communication+dual controller"architecture.At the software level，security is guaranteed by state machines，fusionalgorithmsand multi-level circuit breakers.Taking a certain pure electriccommercial vehicleasan example，practical verification shows thatthe sensor redundancy design can significantlyreduce the failurerate from1.2× 10-4/h to 3.5×10-7/h ，meeting the ASIL-B safety level standard.

【Key words】new energy vehicles；three-electricity system；battery protection；hardware security；sensor redundancy

0 引言

2024年在政策、技术与环保意识驱动下，全球新能源汽车市场蓬勃发展。（剩余3343字）