Accelerated Aging Profile Generation Method for Lithium-Ion Batteries Considering Aging Path

被引:0
|
作者
Guo, Dongxu [1 ,2 ]
Yang, Geng [1 ]
Feng, Xuning [2 ]
Lu, Languang [2 ]
Ouyang, Minggao [2 ]
机构
[1] Department of Automation, Tsinghua University, Beijing,100084, China
[2] State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing,100084, China
来源
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2022年 / 37卷 / 18期
关键词
Accelerated ageing - Accelerated ageing tests - Acceleration factors - Ageing profiles - Ageing tests - Aging path - Closed loop architecture - Double closed loop - Double closed-loop architecture - Objective functions;
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学科分类号
摘要
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. © 2022 Chinese Machine Press. All rights reserved.
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页码:4788 / 4797
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