一种锂离子电池荷电状态估计与功率预测方法

doi:10.19595/j.cnki.1000-6753.tces.160557

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摘要为了能够准确估计锂离子电池的荷电状态(SOC),同时对电池实际可用的最大充、放电功率进行预测,在研究电池充、放电过程中的滞回现象的基础上,建立基于电压滞回特性的二阶RC等效电路模型。为了避免因噪声统计特性造成的误差,将H∞滤波算法应用到锂离子电池的SOC估计中,减少了估计过程中的模型误差和算法误差,提高了估计的鲁棒性。将电池电压、电流和SOC的估计值作为联合约束条件预测锂离子电池实际可用的最大充、放电功率,对电池做脉冲充、放电实验,实验分析表明,与混合脉冲功率特性(HPPC)测试方法相比,联合约束算法提高了预测电池功率的准确性。

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	程泽
	孙幸勉
	程思璐

关键词 ：锂离子电池, 电池模型, 荷电状态, 功率状态

Abstract：In order to estimate the state of charge (SOC) of lithium-ion battery precisely and predict the actual maximum charge/discharge power of the battery,a second-order RC hysteresis model was established based on the hysteresis phenomena which appeared during the charge-discharge process.The H∞ filter algorithm was used to estimate SOC,which avoided the error caused by the statistical characteristics of noise.This method greatly reduces the model error and algorithm error,and improves the robustness of parameter estimation.Regard the battery voltage,current and the estimation of SOC as constraint conditions to predict the actual maximum charge-discharge power of the lithium-ion battery.Compared with the hybrid pulse power characterization (HPPC) method,the pulse charge-discharge experiments showed that the method proposed had higher accuracy in estimating the battery power.

Key words： Lithium-ion battery battery model state of change state of power

收稿日期: 2016-04-26 出版日期: 2017-08-18

PACS:

TM911

基金资助:国家自然科学基金项目资助(61374122)。

作者简介: 程泽男,1959 年生,教授,研究方向为动力电池组安全评估与故障诊断。E-mail:chengze@tju.edu.cn(通信作者)孙幸勉女,1992 年生,硕士研究生,研究方向为锂离子电池SOC估计。E-mail:731569462@qq.com

引用本文:

程泽，孙幸勉，程思璐. 一种锂离子电池荷电状态估计与功率预测方法[J]. 电工技术学报, 2017, 32(15): 180-189. Cheng Ze， Sun Xingmian， Cheng Silu，. Method for Estimation of State of Charge and Power Prediction of Lithium-Ion Battery. Transactions of China Electrotechnical Society, 2017, 32(15): 180-189.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.160557 https://dgjsxb.ces-transaction.com/CN/Y2017/V32/I15/180

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