REDOX FLOW BATTERY AND METHOD FOR OPERATING SAME

A redox flow battery includes a cell arrangement and a measuring apparatus for determining the charging state. The measuring apparatus comprises includes a hydraulic connecting line which connects the first tank to the second tank so that there is a permanent electrical connection between the electrolyte liquids in the two tanks. The measuring apparatus includes at least two electrodes. A first electrode is arranged directly in the positive electrolyte circuit. A second electrode is arranged directly in the negative electrolyte circuit. The redox flow battery includes a control apparatus which is designed such that it can detect a voltage difference between two electrodes.