Design Based On Infineon XC2785of Electric Vehicle Battery Management System

Energy and environmental problems become more serious，traditional fuel vehicleemissions makes urban air pollution index high.As a new generation oftransport,electric vehicles have a large flexibility in the energy configuration.As aninevitable product of energy transition era,hybrid cars have achieved the fuel andpower better together.Despite the development electric vehicles have made greateprogess,but in order to reach the point of entirely replacing the fuel, there is still along way to go.As one of the key technologies of electric vehicles,battery management systemhas not only a tremendous impact on safety performance of electric vehicles,but alsohelp to improve the work efficiency of battery power and Extend the life of thebattery.Therefore,the battery management system research will have greatsignificance to People’s life.The design based on the existing research dedicates todesign a more practical and efficient battery management system.This paper describesthe design of battery management system as well as specific implementations.Batterymanagement system monitors the entire battery power during operation in realtime,including voltage,current detection,SOC calculation,single cell balancing andfault handling and so on.The design of battery management system is based on Infineon’s16-bitmicrocontroller XC2785,and uses distributed topology based on dual CAN. Mastercontrol unit, monitoring unit, and the control unit constitute the whole controlsystem.The monitor unit focuses on the analysis and comparison of single cell voltageand temperature collecting solution.This system has achieved the accurate batterydetection,including cell voltage,single temperature,the total voltage,totalcurrent,running time,working conditions and so on.In addition,this system also has theability of fault handling and anti-interference.This paper verifies the effectiveness and feasibility of the battery managementsystem on the basis of a large number of experimental data,and provides a reliableengineering for further study of the battery management system.