Extreme cold and hot weather influence the performance of batteries significantly. Vanadium redox flow batteries (VRFB) work efficiently in the temperature range of 10⁰C to 40⁰C. In this work, a physics-based electrochemical model has been developed to calculate the overpotentials and cell voltage at different temperatures. Decrease in temperature hinders the performance of VRFB by increasing the overpotential. The model is validated with the experiment results of 426 cm2 single cell VRFB at 25, 10 and -10⁰C.
Keywords Electrochemical model, Vanadium redox flow batteries, Overpotential, Temperature