Redox flow battery

A redox flow battery according to an embodiment of the present invention comprises: a module formed by arranging unit modules, which comprise unit stacks that generate electric currents, on side surfaces of each other and electrically connecting the same; an electrolyte tank for supplying the module with an electrolyte and storing the electrolyte that flows out of the module; an electrolyte inflow line for connecting the electrolyte tank and the module such that, by means of driving of an electrolyte pump, the electrolyte flows into the module; an electrolyte outflow line for connecting the electrolyte tank and the module such that the electrolyte flows out of the module; and an electronic equipment unit for simultaneously conducting rpm control and frequency control with regard to the rate of the electrolyte pump.