Flow Battery FMEA (Failure Mode and Effects Analysis) is a critical tool for ensuring the safety and efficiency of energy storage solutions. This article explores how FMEA applies to flow batteries, identifies common failure modes, and provides actionable insights for industries like renewable. Outline To support quantitative analyses on battery reliability and safety: Needs: Failure analysis (FA ) and failure mode and effect analysis (FMEA) is important to guide cell design and qualification. Firstly, as an evaluation language with a double-hierarchy structure, the Double Hierarchy Hesitant Fuzzy. Proceedings of the 35th European Safety and Reliability & the 33rd Society for Risk Analysis Europe Conference Edited by Eirik Bjorheim Abrahamsen, Terje Aven, Frederic Bouder, Roger Flage, Marja Ylönen ©2025 ESREL SRA-E 2025 Organizers. Published by Research Publishing, Singapore.