电池管理系统CAN信号不同步对于插电式混合动力电动汽车控制策略与安全性的影响分析

Analysis on the Influence of Battery Management System CAN Message Asynchronous for PHEV Control Strategy and Safety Performance

针对电池管理系统的控制器局域网络(Controller area network,CAN)总线信号存在不一致性,可能会影响到插电式混合动力电动汽车控制策略和安全防护性的问题,通过分析电池管理系统CAN总线信号不一致性产生的根源,建立整车仿真计算模型,从理论上分析电池管理系统不同CAN总线信号通信的不同步对于整车控制策略和安全性的影响,以理论分析的结果为指导,电池管理系统进行针对性的设计改进和处理,并引入电动力能力动态监控方法(Dynamic monitor and management power,DMMP)对于动力电池的荷电状态(State of charge,SOC)算法进行修正,提高SOC的计算精度,使得不同CAN总线信号通信的不同步对于整车控制策略和安全性的影响降低到可以接受的范围内。仿真计算和试验的结果表明,采取有效的处理措施,电池管理系统CAN总线信号通信的不同步情况可以不影响到整车的安全性。

In order to solve the influence of vehicle control strategy and safety performance for battery management system controller area network（CAN） message asynchronous, the source of CAN signal inconsistency is analyzed and plug-in hybrid electric vehicle（PHEV） simulation model is build. Battery management system CAN message asynchronous is analyzed and modified by theory method. Battery management system（BMS） is designed based on theory analysis result and dynamic monitor and management power（DMMP） method is applied in state of charge（SOC） modify calculation procedure in order to improve accuracy. The influence of vehicle control strategy and safety performance can be limited and accepted. The simulated and test result are shown as vehicle control strategy and safety performance can＇t be affected hardly by vehicle control strategy and safety performance after improved design method is used.