The electric vehicle (EV) batteries should be repurposed after reaching End of Life (EoL), because it could be economically and environmentally beneficial. State of Health (SoH) estimation plays an essential role in repurposing these EoL Lithium (Li)-ion batteries. The aim of this paper is to review different SoH estimation technique to present a novel feature based classification. The review also investigates the issues and challenges in estimating SoH for Li-ion battery, with possible solutions. Furthermore, the study provides proposals for the development of SoH estimation methods for EV batteries in the context of the circular economy.

中文翻译：

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循环经济背景下锂离子电池健康状况评估方法的回顾

电动车（EV）电池在达到使用寿命（EoL）后应重新使用，因为这可能在经济和环境方面均有利。健康状况（SoH）估计在重新使用这些EoL锂（Li）离子电池方面起着至关重要的作用。本文的目的是回顾不同的SoH估计技术，以提出一种基于特征的新颖分类。审查还调查了估计锂离子电池SoH的问题和挑战，并提出了可能的解决方案。此外，该研究为发展循环经济背景下的电动汽车电池SoH估算方法提供了建议。