CHARGING METHOD OF VANADIUM REDOX FLOW BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a charging method capable of efficient operation by restraining generation of gas in a method for always charging a redox flow battery. SOLUTION: This charging method of a vanadium redox flow battery includes a negative electrode active material changing to bivalent vanadium ions from a trivalent vanadium ions at charging time, and causing reverse reaction at discharging time in a negative electrode. Electric energy corresponding to self- discharge electric energy is always replenished and charged at standby time. This charging is performed so that the bivalent vanadium ions in the negative electrode active material becomes 94% or less.