REDOX FLOW BATTERY SYSTEM AND METHOD FOR OPERATING REDOX FLOW BATTERY SYSTEM

A redox flow battery system includes a plurality of branch circuits electrically connecting a plurality of battery cell parts in parallel; a switching unit configured to switch conduction states of a closed loop in which the branch circuits are connected together; a circulation mechanism including a tank configured to store an electrolyte, and a pump configured to circulate the electrolyte from the tank to the battery cell parts; a detection unit configured to detect physical quantities correlating with open circuit voltages of the battery cell parts; a determination unit configured to determine, on a basis of the physical quantities detected by the detection unit, as to whether or not a voltage difference between the open circuit voltages of the battery cell parts is equal to or more than a predetermined value; and a control unit configured to control a switching operation of the switching unit such that, when the determination unit determines the voltage difference to be more than the predetermined value, the closed loop is brought into a non-conducting state and, when the determination unit determines the voltage difference to be equal to or less than the predetermined value, the closed loop is brought into a conducting state.