摘要
锂电池荷电状态用来描述电池剩余电量的多少,是电池管理系统中的核心参数。电池循环次数、瞬间大电流以及温度等因素都会使电池特性发生变化。针对动力电池这一动态非线性系统,在二阶RC电池等效模型中增加了表征温度效应的等效电阻,提出了一种基于扩展卡尔曼滤波的锂电池荷电状态估计算法。该算法通过构建状态方程和量测方程,经历预测、修正和估算3阶段,实现了对锂电池的荷电状态的估算。
The state of charge of lithium battery is used to describe the amount of remaining battery power. The number of cell cycle factors, instantaneous large current and temperature will cause the battery characteristics change. According to the power battery nonlinear system, we have added the equivalent resistance to the temperature effect in the two order RC cell equivalent model, and an estimation algorithm for the state of charge of lithium battery based on EKF is proposed. This method achieves the SOC estimation of the airborne lithium battery by constructing the state equation and the measurement equation through forecasting, correcting and estimating stages
出处
《农业装备与车辆工程》
2017年第8期45-48,共4页
Agricultural Equipment & Vehicle Engineering
