A Research On Remote Monitoringand Controlsysterm Applied To EV Battery Management Systerm

The progression of Electric Vehicles (EV) technology happened in recent yearsadds more and more likelihoods to the transformation of EV technology into a realworld application, where the power battery’s performance has become the bottleneck. At this stage, adopting an effective Battery Management System (BMS)proves to be an effective way in extending the battery stack’s life and improving itsperformance, but yet, there is still a large room for the improvement of batterymanagement technology.Effective data collection and analysis of the EV battery operationalperformance in the actual runtime environment mean significantly to the success ofBMS research. The traditional way of data collection is done via field study, and itis a troublesome procedure, especially for EVs that are on trials. To solve thisproblem, the author designed a remote monitoring and control system for BMSbased on GPRS in this paper, and the author’s arguments are made based on theliterature review of the latest research achievements on remote monitoring andcontrol system applied to EV, home and abroad.Firstly, the author introduces the general structure of the system. This systemconsists of two components, a remote data transmission terminal (GPRS DTU) onEV and a software platform of the remote monitoring and control center. Byinstalling the terminal nodes for remote data transmission purposes on thedistributed BMS for EV, researchers are enabled to access the battery operationalperformance data collected by the BMS via the software platform of the remotemonitoring and control center.Secondly, this paper reveals the detailed software and hardware designprocedures of the remote data transmission terminal module. On the hardware level,the author made use of a vehicle application-level chips with the CAN controller,and take advantage of shielding techniques to make the design resistant to theelectric-magnetic field emitted from the EV. On the software level, the authorimplemented both of the CAN communication and the GPRS communicationprogramming for the system. The author designed a message cache for CAN framesdedicated for more effective mass data transmission and high transmissionefficiency, a transfer format of converting network data packages to the CANframes, and also implemented the configuration function of the GPRS DTUparameters via serial ports. Last but not least, the author programmed a software platform of the remotemonitoring and control center in LabVIEW. This platform not only realizesreal-time operational performance data collection task for the EV BMS, but alsoserves as a complete database, where the data can be replayed and re-analyzed inthe future. It made it easier for researchers to make further innovations.Through experiments, all of the sub-systems discussed in this paper arevalidated for their expected functions.