中圖分類號： TN06；TM912
文獻標識碼： A
DOI：10.16157/j.issn.0258-7998.200607
中文引用格式： 崔耕韜，江衛(wèi)華，涂煒. 基于EKF算法的鋰電池SOC估算策略[J].電子技術(shù)應(yīng)用，2021，47(3)：36-39.
英文引用格式： Cui Gengtao，Jiang Weihua，Tu Wei. SOC estimation of lithium battery based on extended Kalman filter algorithm[J]. Application of Electronic Technique，2021，47(3)：36-39.

SOC estimation of lithium battery based on extended Kalman filter algorithm

Abstract： In the battery management system, the accurate estimation of State of Charge(SOC) has an important position, its impor- tance is not only to the user prompt battery remaining power, more is that it is the basis of the battery charge and discharge management and balanced control management.And SOC is affected by many factors, such as temperature and current size,direction,etc,so it is difficult to predict it accurately.In this paper, an extended Kalman filter(EKF) algorithm is proposed to estimate the SOC of lithium battery.The battery model was established, and the parameter identification was carried out through the Hybrid Pulse Power Characteristic(HPPC) test.The SOC estimation error of the model is about 2.1% under constant discharge,it shows that the model is effective and easy to apply.

Key words : the lithium battery；EKF algorithm；HPPC test；SOC estimation