The invention belongs to the field of flow batteries, and discloses a real-time monitoring, regulating and controlling method for attenuation of an
energy storage medium of a
flow battery. The method comprises the following steps: calculating the total amount of substances, capable of participating in electrochemical reaction, of positive and negative electrolytes before battery operation, and recording the total amount as Mtotal; presetting the maximum value P1max of the permeability attenuation rate and the maximum value P2max of the average valence attenuation rate; according to the total
molar weight of the positive
electrode and the negative electrodes in the initial state, the real-time SOC of the positive
electrode and the negative
electrode and the real-time charging and discharging amount Q, calculating the real-time
molar content of the positive electrode
electrolyte and the negative electrode
electrolyte, and then monitoring the attenuation amount of the positive electrode
electrolyte and the negative electrode electrolyte, the attenuation amount comprising the permeability attenuation rate P1 and the average valence attenuation rate P2, when the actual permeability attenuation rate P1r is larger than P1max, performing adjusting operation, enabling P1 to be equal to 0, and when P2r is larger than P2max, carrying out valence state
recovery operation. According to the invention, through online real-time monitoring of the electrolyte state, automatic online monitoring and adjustment can be realized, the labor cost is saved, the tedious process is avoided, and the valence attenuation and the volume attenuation in the operation process of the battery can be accurately measured online.