An All-Vanadium Redox Flow Battery: A Comprehensive Equivalent Circuit Model

In this paper, we propose a sophisticated battery model for vanadium redox flow batteries (VRFBs), which are promising energy storage technology due to their design flexibility, low manufacturing costs on large scale, indefinite lifetime, and recyclable electrolytes. Primarily, fluid distribution is analysed using computational dynamics (CFD) considering only half-cells. Based the analysis results, novel developed in MATLAB Simulink environment capable of identifying both steady-state dynamic characteristics VRFBs. Unlike majority published studies, inherent battery, such as shunt current, ion diffusion, pumping consumption, considered. Furthermore, simplified charge transfer resistance (CTR) taken into account based electrochemical impedance spectroscopy (EIS) measurement results. The accuracy was determined by comparing simulation results generated equivalent circuit study with real datasets. obtained indicate that has an 3% under sample operating conditions selected. This can also be used fill gap left absence VRFB commonly programs renewable systems, TRNSYS.