电工技术学报  2022, Vol. 37 Issue (18): 4788-4797    DOI: 10.19595/j.cnki.1000-6753.tces.210336
电能存储与应用 |
计及老化路径的锂离子电池加速寿命工况自动生成方法
郭东旭1,2, 杨耕1, 冯旭宁2, 卢兰光2, 欧阳明高2
1.清华大学自动化系 北京 100084;
2.汽车安全与节能国家重点实验室(清华大学) 北京 100084
Accelerated Aging Profile Generation Method for Lithium-Ion Batteries Considering Aging Path
Guo Dongxu1,2, Yang Geng1, Feng Xuning2, Lu Languang2, Ouyang Minggao2
1. Department of Automation Tsinghua University Beijing 100084 China;
2. State Key Laboratory of Automotive Safety and Energy Tsinghua University Beijing 100084 China
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摘要 为了验证锂离子电池在长期使用中的性能,需要对锂离子电池进行寿命测试。现阶段锂离子电池寿命一般长达数千循环,进行常规寿命测试十分耗时,需要开发加速寿命的实验方法。由于锂离子电池寿命衰减具有对使用路径的依赖性,因此设计该加速寿命实验方法的约束是:既要保证加速前后总容量衰减的等价性,还要保证内部衰减机理即老化路径的不变性。该文提出一套基于模型的可保证上述约束的加速寿命工况自动生成方法。方法设计了综合考虑加速因子(加速时间倍率)和老化路径相对误差两个指标的目标函数,并采用双闭环构架求取符合该目标函数的加速工况最优解。双闭环的外环为加速因子优化算法,旨在寻找最优的加速时间倍率;内环为加速工况搜索算法,旨在搜索对应于加速因子和上述约束的最优加速工况。针对中国轻型汽车行驶工况中的乘用车行驶工况,该文方法基于作者研发的考虑锂离子电池主导衰减机理的半经验分数阶模型进行仿真,仿真结果证明了方法的有效性。
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关键词 锂离子电池老化路径双闭环构架加速因子禁忌搜索    
Abstract:The lithium-ion battery (LiB) requires an aging test to ensure its reliability during long-term use. The conventional aging test is very time-consuming because the current LiB life span is thousands of cycles. Therefore, an accelerated aging test method for LiB is needed. The degradation of the LiB is path-dependent. Therefore, the constraints of designing this accelerated aging test method are: to ensure both the equivalence of LiB capacity and the invariance of its internal degradation mechanism. This paper proposes a model-based method for generating an accelerated aging profile. The objective function considering the acceleration factor and the relative error of the aging path is constructed, and the optimal solution of the objective function is obtained by a double closed-loop architecture. In the double closed-loop architecture, the outer loop is an acceleration factor optimization algorithm that aims to find the optimal acceleration factor; the inner loop is an acceleration profile search algorithm, aiming to search the optimal acceleration profile under a given acceleration factor. The accelerated aging profile of the China light-duty vehicle test cycle-passenger car (CLTC-P) is generated under the given objective function based on the proposed method. The simulation is carried out based on the semi-empirical fractional-order model considering the dominant degradation mechanism of the LiB developed by the authors, which verifies the effectiveness of the method.
Key wordsLithium-ion battery    aging path    double closed-loop architecture    acceleration factor    tabu search   
收稿日期: 2021-03-12     
PACS: TM912  
基金资助:科技部国际科技合作专项项目(2019YFE0102200)、科技部重点研发计划新能源汽车重点专项(2018YFB0104404)和台达电力电子科教发展计划项目(DREK2020001)资助
通讯作者: 杨 耕 男,1957年生,教授,博士生导师,研究方向为电机拖动系统与电力电子系统控制技术、风电和光伏系统的控制和优化、动力电池系统建模。E-mail: yanggeng@tsinghua.edu.cn   
作者简介: 郭东旭 男,1993年生,博士,研究方向为锂离子动力电池寿命建模。E-mail: guodongxu@tsinghua.edu.cn
引用本文:   
郭东旭, 杨耕, 冯旭宁, 卢兰光, 欧阳明高. 计及老化路径的锂离子电池加速寿命工况自动生成方法[J]. 电工技术学报, 2022, 37(18): 4788-4797. Guo Dongxu, Yang Geng, Feng Xuning, Lu Languang, Ouyang Minggao. Accelerated Aging Profile Generation Method for Lithium-Ion Batteries Considering Aging Path. Transactions of China Electrotechnical Society, 2022, 37(18): 4788-4797.
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