修正参数的安时法估算锂离子电池剩余电量  

Estimation on the State of Charge of Lithium-ion Battery by Correction Factors Ampere-hour Method

作　　者：陈岚[1] 刘皓喆 张谦[1] 范永清[1] 

机构地区：[1]上海应用技术学院电气与电子工程学院,上海201418

出　　处：《上海应用技术学院学报（自然科学版）》2014年第4期310-313,318,共5页Journal of Shanghai Institute of Technology: Natural Science

基　　金：上海市教委科研创新重点项目(14ZZ163);上海应用技术学院毕业设计(论文)重点项目(33110T145014)

摘　　要：安时法是目前估算锂离子电池荷电状态(SOC)最常用的方法之一.由于安时法不能估计初始荷电状态(SOC0),且难于准确测量库仑效率和电池可用容量变化,会造成累计误差,影响SOC估算精度.考虑锂离子电池的可用容量会随环境温度、放电电流以及电池老化等性能影响,结合开路电压法和安时法,对比实验数据进行误差分析与校正,提出了一种提高SOC估算精度的修正参数方法.仿真结果表明,用修正参数的安时法估算电池剩余电量可以减少误差,提高精度.Ampere-hour method is one of the most commonly used methods to estimate the state of charge（SOC）of lithium-ion battery.However,since the method can＇t estimate the initial state of charge（SOC0）and it is difficult to measure Coulombic efficiency and battery available capacity change accurately,so cumulative errors will arise and the estimation accuracy of SOC will be affected as well.Taking into account the influence of the available capacity of lithium-ion battery will be affected by the environmental temperature change,the discharge current and the battery aging,a correction coefficient algorithm for improving the SOC estimation accuracy was proposed on the basis of the open-circuit voltage method and ampere-hour method and by comparing their experimental data.The simulation results showed that estimation on the state of charge of lithium-ion battery ampere-hour method based on correction factors could reduce errors and improve the precision.

关 键 词：锂离子电池 荷电状态 安时法 修正参数 

分 类 号：TM912[电气工程—电力电子与电力传动]