动力电池管理系统的设计与仿真研究

Design and Simulation of Power Lithium Battery Management System

目前电源管理系统的工况适用性差,无法针对当前路况进行实时调节,降低了电池的循环寿命;针对这一问题,提出了一种基于单片机的可切换电池成组的电源管理系统,把放电电压和电流作为修正量,采取EKF算法提高SOC的估算精度;实验表明:采用单体电池放电试验,验证采集模块设计的准确性,并利用Simulink对工况仿真,验证了SOC估算的准确性和系统根据不同工况自动切换电池成组方式的可靠性。

At present,the operating conditions of the power management system is poor,which can not be adjusted in real time for the current road conditions,reducing the cycle life of the battery.According to this problem,this paper proposes a kind of power management system capable of switching battery group based on single chip microcomputer.In this system,the discharge voltage and current are used as the correction,and the EKF algorithm is adopted to improve the accuracy of SOC estimation.Experiment shows:The accuracy of the design of the acquisition module can be verified by using the single battery discharge test.Then using Simulink to simulate the working condition,the accuracy of SOC estimation is verified.According to the different operating conditions,the system automatically switches the reliability of the battery group.