Estimation of the minimum and maximum states of charge of lithium-ion battery packs: A hybrid approach

IF 5.9 2区计算机科学 Q1 AUTOMATION & CONTROL SYSTEMS

Automatica Pub Date : 2025-09-30 DOI:10.1016/j.automatica.2025.112630

Mira Khalil , Romain Postoyan , Stéphane Raël , Dragan Nešić

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Abstract

Monitoring the minimum and maximum states of charge (SOC) in lithium-ion battery packs is key to ensuring safe and reliable long-term operation. The challenge is that these SOCs cannot be directly measured and their corresponding cells within the pack may change with time. This paper proposes a novel hybrid scheme that estimates the minimum and maximum SOCs within a battery pack given by the series interconnection of equivalent circuit models. The estimation scheme relies on a mechanism that determines online two cells, which are candidates for having the minimum and maximum SOCs. The dimension of the hybrid estimator is independent of the number of cells, which makes it particularly attractive for large battery packs. Moreover, the estimator is endowed with robust, global convergence guarantees despite disturbances and measurement noise. Furthermore, Zeno behavior is ruled out as any solution to the considered system is shown to exhibit an average dwell-time. Numerical simulations illustrate the efficiency in terms of accuracy and computational time of the proposed estimator.

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锂离子电池组最小和最大充电状态的估计：一种混合方法

监测锂离子电池组的最小和最大充电状态（SOC）是确保长期安全可靠运行的关键。挑战在于，这些soc不能直接测量，并且它们在电池组中对应的电池可能会随着时间的推移而变化。本文提出了一种新的混合方案，通过等效电路模型的串联互连来估计电池组内最小和最大soc。估计方案依赖于确定在线两个单元的机制，这两个单元是具有最小和最大soc的候选单元。混合估计器的尺寸与电池的数量无关，这使得它对大型电池组特别有吸引力。此外，该估计器具有鲁棒性和全局收敛性保证，不受干扰和测量噪声的影响。此外，芝诺行为被排除，因为所考虑的系统的任何解决方案都显示出平均停留时间。数值模拟表明了该估计器在精度和计算时间方面的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Automatica 工程技术-工程：电子与电气

CiteScore

10.70

自引率

7.80%

发文量

617

审稿时长

5 months

期刊介绍： Automatica is a leading archival publication in the field of systems and control. The field encompasses today a broad set of areas and topics, and is thriving not only within itself but also in terms of its impact on other fields, such as communications, computers, biology, energy and economics. Since its inception in 1963, Automatica has kept abreast with the evolution of the field over the years, and has emerged as a leading publication driving the trends in the field. After being founded in 1963, Automatica became a journal of the International Federation of Automatic Control (IFAC) in 1969. It features a characteristic blend of theoretical and applied papers of archival, lasting value, reporting cutting edge research results by authors across the globe. It features articles in distinct categories, including regular, brief and survey papers, technical communiqués, correspondence items, as well as reviews on published books of interest to the readership. It occasionally publishes special issues on emerging new topics or established mature topics of interest to a broad audience. Automatica solicits original high-quality contributions in all the categories listed above, and in all areas of systems and control interpreted in a broad sense and evolving constantly. They may be submitted directly to a subject editor or to the Editor-in-Chief if not sure about the subject area. Editorial procedures in place assure careful, fair, and prompt handling of all submitted articles. Accepted papers appear in the journal in the shortest time feasible given production time constraints.