Estimation Method Based On The The Ukf Power Lithium Battery SOC Dynamic

In order to ensure the lithium batteries to normal, safe and effective work, the electric vehicles must be configured to specific lithium battery management system.Power lithium battery SOC dynamic management system for lithium batteries remaining charge amount (SOC) state estimation, control and management. Among them, the SOC dynamic real-time estimation has been the core of the system of power lithium battery, the main parameters to reflect the functional state of power lithium battery, and judge the basis for the vehicle control strategy. In this paper, power lithium battery SOC dynamic estimation method.In this paper, Literature-depth understanding of power lithium battery application status at home and abroad, the basic structure and classification of power lithium battery and its work principle, and several conventional power lithium battery remaining capacity (SOC) estimation method for comparative analysis. Experimental lithium battery charge and discharge characteristic curve analysis of power lithium battery charge and discharge characteristics and SOC influencing factors at the same time, while the extended Kalman filter (EKF) algorithm to estimate the applied power lithium battery remaining capacity (SOC) exists two defects. On this basis, the paper adopted based on unscented Kalman filter (UKF) in estimating the SOC of the lithium battery to overcome the defects of the EKF. In MATLAB using Simulink power lithium battery charge and discharge process of charge SOC simulation, from power lithium battery SOC estimates. And the terminal voltage measured by the dynamic test platform computing power lithium battery from the SOC phase, the results show that the system model is enough to obtain a more precise and reliable power lithium battery SOC estimation value.Designed power lithium battery SOC dynamic estimation of the network system hardware and software. The system consists of data sampling, the SOC algorithm implementation, communications and information storage management and data display modules such as composition, charge and discharge current, the lithium battery voltage, temperature detection, LCD real-time display, lithium battery state of diagnosis and protection function. Emergency Command Center allows users to power lithium battery SOC dynamic management system built-in GPS module with GPRS wireless communication network position, the remaining amount of the lithium battery (SOC) data sent to the background electric vehicles. In the true sense of power lithium battery SOC dynamic real-time online accurate estimate.This research work has a good estimate of effect for power lithium battery SOC dynamic estimation, meet the electric car to the accuracy of the dynamic real-time estimation of power lithium battery pack SOC requirements.