电动汽车锂离子动力电池优化充电技术基础研究

项目名称： 电动汽车锂离子动力电池优化充电技术基础研究

项目编号： No.51277010

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 电工技术

项目作者： 姜久春

作者单位： 北京交通大学

项目金额： 78万元

中文摘要： 针对现有充电技术主要以电池外特性参数为控制目标，缺乏与电池内部反应机理的结合，充电控制策略与电池特性无法实时匹配的问题，本项目提出内外特性结合、多学科综合分析、由特殊到一般的研究思路，依据电化学多孔电极理论、以及液相扩散、固相扩散和电势分配原理，建立锂离子动力电池充电过程的数学模型，研究模型参数的自适应动态估算方法；研究一定电流密度下内部离子迁移过程产生的极化效应及影响因素，建立电池充电极化电压的数学模型；研究电池充电性能作用机制与衰退机理，分析充电电流、电压和温度等各应力对电池寿命衰退的影响度权重，建立锂离子动力电池的充电寿命衰退模型；并以充电寿命和充电时间为目标，提出新型的优化充电方法，实现快速无损的充电过程。

中文关键词： 电动汽车；锂离子电池；极化电压；衰退机理；充电优化

英文摘要： Traditional charging technology uses external parameters of the battery as the control target, which is lack of the combination of internal characteristics of the battery, and the charge control strategy cannot match with battery characteristics in real-time.To address these issues, the research thought combing battery internal electrochemical mechanism with external characters, multi-subject comprehensive analysis, from specific to general is used in the project. Based on the electrochemical porous electrode theory, and principles of liquid diffusion, solid diffusion and potential distribution, the lithium-ion battery dynamic model expressing charging process is introduced,the adaptive estimation theory of parameters is proposed.The polarization effects resulted from internal ion migration process under the specific current density is investigated, and the mathmatical model expressing the relationship of polarization voltage and battery current is presented.The mechanism of battery charging performance and degradation are studied.The effect weights of the charge current,voltage and temperature on battery life degradation are analyzed, and battery charge life model are established.Using cycle life and charging time as the goal, the new optimization charging method is proposed to realize fast charging process wi

英文关键词： Electric vehicles；Lithium-ion batteries；Polarization voltage；Degredation mechanism；Charging optimization