Design Of Monitoring And Management Platform For Power Battery Pack On Electric Vehicle

The increasing car ownership has exacerbated the problems of environmentpollution and energy crisis worldwide. The development of new energy automobilewith characteristics of clean, safe and efficient is drawing more and more attention ofeach country and car manufactory. The technologies of new energy automobile havetaken a considerable development recently.As the power source, the power battery pack is one of the core parts of theelectric vehicle. The capability of battery pack determines the mileage and safety ofvehicles, which makes it important to manage and analyze the power battery pack.The main function of battery management system is to monitor the status of batteryand analyze the performance of battery pack base on the information collected.Monitoring and management platform for lithium iron phosphate power batterypack was designed base on functional requirements using modular design concept inthis paper, including CAN communication system, battery status monitoring systemand database system, and realizing the functions of communication between PC andhardware, battery information display and fault diagnosis, battery pack inconsistencyanalysis and battery model parameter identification. Aiming at the property ofdistributed location of single batteries, a new method of “group-overall” statisticalanalysis for battery pack inconsistency was proposed, which simplifies the amount ofcomputation and complexity of programming. Battery model parameters identificationwas realized through applying MATLAB engine, which improves the computingspeed and accuracy.Combining with hardware and facilities in lab, battery charging and dischargingexperiment was implemented after programming and debugging had been completed.The results of these experiments show that the battery management platform designedcan operate steadily for long with correct information displaying. And we can alsoanalyze the inconsistency and build the model of the battery pack via the batteryinformation stored in the database. These applications of the battery managementplatform also show that it has abundant functions with easy and practical using.