It is estimated that by the year 2030, the cumulative of Electric Vehicles (EVs) will reach 85 million. Once EV batteries degraded to 70–80% of their initial capacity, EV owners will have to replace the EV’s batteries as the residual capacity becomes insufficient for automotive use. As a result, more batteries will be discarded from EVs. These batteries could be re-purposed in other applications, where they are known as the EV Second Life Batteries (SLB). In this paper, several projects and research works are reviewed to understand the up-to-date state-of-the-art related to SLB. The technical feasibility, economics, and environmental impact of using SLB are investigated. Different applications of SLB, as well as the assessment and testing required before re-purposing EV batteries, are presented. Some of the existing projects related to SLB, such as the studies done in many countries, batteries' types, applications, and scope of the study, have been summarised. It was found that utilising SLB addresses not only an environmental concern with regards to the discarded batteries but also provides an excellent opportunity to generate revenue if assessed and used optimally. Nevertheless, some challenges do exist, such as the lack of standardised assessment and lack of reliable information due to the low number of studies related to SLB. Further studies of SLB, which could help understand the feasibility and economics of using them and standardising their assessment, are recommended.

估计到2030年，电动汽车（EV）的累计量将达到8500万。一旦EV电池降到其初始容量的70-80％，由于剩余容量不足以供汽车使用，EV车主将不得不更换EV的电池。结果，更多的电池将从电动汽车中丢弃。这些电池可在其他应用中重新使用，这些应用被称为EV Second Life Batteries（SLB）。在本文中，我们回顾了一些项目和研究工作，以了解与SLB相关的最新技术。研究了使用SLB的技术可行性，经济性和环境影响。介绍了SLB的不同应用以及重新使用EV电池之前所需的评估和测试。现有的一些与SLB相关的项目，例如，在许多国家/地区进行的研究，电池的类型，应用和研究范围已被汇总。已经发现，利用SLB不仅解决了与废弃电池有关的环境问题，而且还提供了一个极好的机会，如果对其进行了最佳评估和使用，就可以创收。然而，确实存在一些挑战，例如由于与SLB相关的研究数量少，因此缺乏标准化的评估和缺乏可靠的信息。建议对SLB进行进一步的研究，以帮助了解使用它们的可行性和经济性，并使它们的评估标准化。已经发现，利用SLB不仅解决了与废弃电池有关的环境问题，而且还提供了一个极好的机会，如果对其进行了最佳评估和使用，就可以创收。然而，确实存在一些挑战，例如由于与SLB相关的研究数量少，因此缺乏标准化的评估和缺乏可靠的信息。建议对SLB进行进一步的研究，以帮助了解使用它们的可行性和经济性，并使它们的评估标准化。已经发现，利用SLB不仅解决了与废弃电池有关的环境问题，而且还提供了一个极好的机会，如果对其进行了最佳评估和使用，就可以创收。然而，确实存在一些挑战，例如由于与SLB相关的研究数量少，因此缺乏标准化的评估和缺乏可靠的信息。建议对SLB进行进一步的研究，以帮助了解使用它们的可行性和经济性，并使它们的评估标准化。