The vanadium redox flow battery (VRFB) is an attractive grid scale energy storage option, but high operating cost impedes widespread commercialization. One way of mitigating cost is to optimize system performance, which requires an accurate model capable of predicting cell voltage under different operating conditions such as current, temperature, flow rate, and state of charge. This paper presents an isothermal VRFB model based on principles of mass transfer and electrochemical kinetics that can predict transient performance with respect to the aforementioned operating conditions. The model captures two important physical phenomena that occur at significantly different time scales as a result of vanadium crossover: (1) rapid self discharge reactions and (2) capacity loss after long term cycling. A gap metric analysis showed that a linear controller for the flow rate may be suitable near the 50% SOC range.
- Dynamic Systems and Control Division
Control-Oriented Model of a Vanadium Redox Flow Battery With Crossover Effects
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Yu, V, & Chen, D. "Control-Oriented Model of a Vanadium Redox Flow Battery With Crossover Effects." Proceedings of the ASME 2012 5th Annual Dynamic Systems and Control Conference joint with the JSME 2012 11th Motion and Vibration Conference. Volume 1: Adaptive Control; Advanced Vehicle Propulsion Systems; Aerospace Systems; Autonomous Systems; Battery Modeling; Biochemical Systems; Control Over Networks; Control Systems Design; Cooperative and Decentralized Control; Dynamic System Modeling; Dynamical Modeling and Diagnostics in Biomedical Systems; Dynamics and Control in Medicine and Biology; Estimation and Fault Detection; Estimation and Fault Detection for Vehicle Applications; Fluid Power Systems; Human Assistive Systems and Wearable Robots; Human-in-the-Loop Systems; Intelligent Transportation Systems; Learning Control. Fort Lauderdale, Florida, USA. October 17–19, 2012. pp. 293-297. ASME. https://doi.org/10.1115/DSCC2012-MOVIC2012-8616
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