基于MATLAB的锂离子电池SOC相关参数辨识

SOC Related Parameters Identification of Lithium Ion Battery Based on MATLAB

锂离子电池因其能量密度大、功率密度高、使用寿命长、安全环保等优点越来越受到电动汽车的青睐。相较于传统燃油车,锂离子电池存在续航里程短、充电时间长、充电设施不完善等问题。通过对电池容量的衡量指标SOC的研究,利用等效电路模型并通过MATLAB曲线拟合对估计SOC所需的相关参数进行辨识,为后续用卡尔曼滤波估计SOC奠定了基础。

Lithium-ion batteries are increasingly favoured for electric vehicles because of their high energy density,high power density,long service life,safety batteries have problems such as short range,long charging time and imperfect charging facilities.Through the study of SOC,a measure of battery capacity,the relevant parameters required for estimating SOC are identified using an equivalent circuit model and fitted with MATLAB curves,laying the foundation for the subsequent estimation of SOC by Kalman filtering.