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祖海鹏,刘旭,杨耕,孙孝峰.锂离子电池静置下阶跃放电电流动态模型[J].电源学报,2019,17(2):163-170
锂离子电池静置下阶跃放电电流动态模型
Dynamic Model for Step Current Discharge of Lithium-ion Battery after Rest
投稿时间:2017-12-20  修订日期:2018-10-20
DOI:10.13234/j.issn.2095-2805.2019.2.163
中文关键词:  锂离子电池  阶跃电流响应  扩散系数  参数辨识  电池模型
英文关键词:lithium-ion battery  step current response  diffusion coefficient  parameter estimation  model of battery
基金项目:国家重点研发计划资助项目(2016YFB0900300);国家自然科学基金资助项目(61722307,U1510208);国家电网科技项目部资助项目(NY71-16-052)
作者单位E-mail
祖海鹏 燕山大学电气工程学院, 秦皇岛 066000  
刘旭 清华大学自动化系, 北京 100084  
杨耕 清华大学自动化系, 北京 100084 yanggeng@tsinghua.edu.cn 
孙孝峰 燕山大学电气工程学院, 秦皇岛 066000  
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中文摘要:
      分析锂离子电池的一些特性时通常要电池的恒流放电曲线特性。目前工程上一般令电池输出阶跃电流以测取这个曲线,因此得到的电池电压特性是阶跃电流响应而不是恒电流响应。基于电化学理论中的控制电流法提出了建立锂离子电池阶跃电流响应模型的方法,分析了放电过程正极材料扩散系数的变化对电池端电压的影响,建立了数学模型并给出了模型参数的获取方法,还分析了模型参数随工作电流、环境温度以及电池荷电状态的变化规律。仿真和实物实验验证了模型的正确性。
英文摘要:
      The constant current discharge(CCD) curve of a battery is usually used to analyze some characteristics of the lithium-ion battery. However, in engineering practices, step current is generally managed to be output from the battery when measuring the CCD curve. Consequently, the battery's voltage characteristics are step current responses rather than CCD responses. In this paper, based on the controlled-current method in the electrochemical theory, a method to establish the step current response model of the lithium-ion battery is proposed. After the analysis of the influence of cathode material's diffusion coefficient variation on the terminal voltage, a mathematical model is established, and the calculation method for model parameters is given. In addition, the relations of model parameters with the operation current, ambient temperature, and the state of charge of the battery are analyzed. The proposed model was verified by both simulations and experiments.
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