An LCA-based periodic benefit evaluation and optimization of fast charging station in secondary utilization of EoL batteries

作者：Yan, Wei; Zhang, Qian^*; Zhang, Xumei; Zhu, Shuo; Jiang, Zhigang; Liu, Yuhang

来源：Journal of Energy Storage, 2024, 83: 110741.

DOI：10.1016/j.est.2024.110741

• Energy storage technology
• Secondary utilization
• Life cycle assessment
• Fast charging station
• Capacity allocation
• Periodic benefit

Energy storage technology (EST) for secondary utilization has emerged as an effective solution to address the challenges associated with recycling end-of-life (EoL) batteries. The fast-charging station (FCS), as an important secondary utilization scenario, has received attention and grown rapidly in number and scale. Evaluating and optimizing their benefits can maximize the use of EoL batteries. The environmental benefits generated in secondary utilization of FCS scenario are closely related to the battery life cycle, while the configuration of different numbers of EoL batteries also greatly affects the overall benefit. To fill these gaps, this paper proposes a life cycle analysis-based approach for optimizing the periodic benefits of FCSs. Firstly, the environmental impact of FCS scenario is analyzed through the life cycle assessment (LCA). Secondly, the monetary value of environmental impact is innovatively added to the benefit of each phase of FCS. A periodic benefit optimization model is then developed, and this model is solved using a genetic algorithm. Finally, a case study is used to verify the proposed model and approach, and the result demonstrates that a significant 39 % increase in benefits compared to the conventional energy storage system (ESS). The sensitivity analysis is also supplemented. It shown that stakeholders such as EV original equipment manufacturers (OEMs) and repurposing businesses should work together in a win-win situation.