Research On Management System Of Lithium Iron Phosphate Battery

New energy sources such as wind power and solar energy have become the focus of energy research because of the advantages of environmental protection,no pollution and so on.Energy storage technology is one of the key technologies in the application of new energy power generation technology.How to achieve real-time measurement and control of battery status parameters,improve the accuracy of battery power estimation,improve the efficiency of the battery balance to prevent the battery overcharge and over discharge,make full use of battery capacity and extend battery life,is the current battery management system hot issues,which is of great research value.This paper selects the large capacity lithium iron phosphate battery used in energy storage power station as the research object,considering the characteristics of energy storage battery as well as on the basis of research and analysis of the domestic and foreign existing battery management system,designed a set of STM32 chip for the subsystem and EPC-8900-based system of battery management system.In the design the system achieved the standardization to improve the system scalability.After considering the advantages and disadvantages of SOC algorithms,this paper selected the improved estimation of ampere hour method and open circuit voltage method hybrid algorithm of battery SOC,the error of the improved algorithm is estimated based on the experimental method.After the study of the existing battery equalization technology,this paper selected Buck-Boost circuit as the main topology construction of the battery equalization system,and to further optimize and improve the Buck-Boost circuit topology,completed the design of the lithium iron phosphate battery equalization control system,and set up the equalization system in Matlab/SimPowerSystem simulation environment.Simulation experiments are carried out to verify the feasibility of several equilibrium strategies.At last,the battery module is set up,and the error analysis of the voltage detection is carried out.The battery management system is debugged and the characteristics of lithium iron phosphate batteries were further studied.