A redox flow system for storing and releasing electrochemical energy , comprising: - n electrochemical cells electrically connected in series, n being an integer greater than or equal to 2, each cell comprising a chamber formed by a cathode compartment containing a catholyte and an anode compartment containing an anolyte, said cathode and anode compartments being separated by a separator that is electrically insulating and permeable to the ions contained in the catholyte and the anolyte, and said cathode and anode compartments each comprising an inlet duct and an outlet duct for the circulation respectively of the catholyte and of the anolyte in said compartments ; - a first storage tank for the catholyte; - a second storage tank for the anolyte; - means for fluid communication between the first tank and the cathode compartment of each electrochemical cell and between the second tank and the anode compartment of each electrochemical cell , such that the electrochemical cells are fluidically connected in parallel; - a system for reducing shunt currents comprising: -- means for injecting a gas into the inlet and outlet ducts of the cathode and anode compartments of (n-1) electrochemical cells in order to form gas bubbles in said inlet and outlet ducts; -- a device for removing the gas bubbles which is positioned on the inlet ducts of the cathode and anode compartments of said (n-1) electrochemical cells , said device being positioned downstream of the means for injecting the gas and upstream of the cathode and anode compartments. - n electrochemical cells electrically connected in series, n being an integer greater than or equal to 2, each cell comprising a chamber formed by a cathode compartment containing a catholyte and an anode compartment containing an anolyte, said cathode and anode compartments being separated by a separator that is electrically insulating and permeable to the ions contained in the catholyte and the anolyte, and said cathode and anode compartments each comprising an inlet duct and an outlet duct for the circulation respectively of the catholyte and of the anolyte in said compartments ; - a first storage tank for the catholyte; - a second storage tank for the anolyte; - means for fluid communication between the first tank and the cathode compartment of each electrochemical cell and between the second tank and the anode compartment of each electrochemical cell , such that the electrochemical cells are fluidically connected in parallel; - a system for reducing shunt currents comprising: -- means for injecting a gas into the inlet and outlet ducts of the cathode and anode compartments of (n-1) electrochemical cells in order to form gas bubbles in said inlet and outlet ducts; -- a device for removing the gas bubbles which is positioned on the inlet ducts of the cathode and anode compartments of said (n-1) electrochemical cells , said device being positioned downstream of the means for injecting the gas and upstream of the cathode and anode compartments. -- means for injecting a gas into the inlet and outlet ducts of the cathode and anode compartments of (n-1) electrochemical cells in order to form gas bubbles in said inlet and outlet ducts; -- a device for removing the gas bubbles which is positioned on the inlet ducts of the cathode and anode compartments of said (n-1) electrochemical cells , said device being positioned downstream of the means for injecting the gas and upstream of the cathode and anode compartments. <EOS>