RV Battery Management System Based On Raspberry Pi

With the continuous improvement of living standards,the demand for the performance of the RV has gradually increased.There are many additional electrical equipments in the RV,and there are many high-power equipments.Therefore,when the user does not pay attention,the battery pack may be depleted,resulting in the failure of the additional electrical appliances to be used normally and the vehicle unable to start.In order to make the battery work safer and more stable,we must equip it with a complete management system to ensure its normal operation.At present,the RV on the market lacks centralized management of the electrical equipment.Therefore,the BMS developed by the subject requires not only the battery voltage,temperature,state of charge(SOC)and other vehicle/battery information.Unified management of faults,completion of status display and alarm prompts;combined with the idea of smart home,intelligent management of electrical appliances,based on collected power and power consumption information,proposes a management control strategy based on SOC window division to achieve environmental protection and energy conservation Living environment and can extend the life of the device.The battery is like the heart of the whole system,and its state determines the performance of the BMS.Therefore,research on the battery is an indispensable step.This paper analyzes the battery characteristics,designs related experiments,tests its safety,compares the common models,analyzes the advantages and disadvantages of each model,selects Thevenin equivalent circuit model based on the actual situation,and identifies the parameters to provide a theoretical basis for estimating SOC.Compared with the current popular algorithms,the SOC estimation method based on the open circuit voltage method and the ampere-time integration method is proposed.The effects of temperature,self-discharge rate and charge-discharge rate are considered,and the accuracy is verified by using maltab simulation.According to the functional requirements of the system,the Raspberry Pi-based RV battery management system was designed based on the distributed structure.The battery monitoring module is used to collect battery related parameters,provide SOC estimation data,and monitor battery status.The electrical metering module is used to collect the electrical parameters of each device,calculate the power and power information,and use the SOC-based management strategy to control each device,and help the user to control the power consumption to achieve energy saving and emission reduction.In addition,real-time display and storage of battery pack and appliance power is required,which allows users to view historical information,have a fuller understanding of battery status,and use VNC to realize remote monitoring and control of the system.