Vanadium battery, the full name of vanadium redox flow battery (Vanadium Redox Battery, abbreviated as VRB), is a kind of oxidation that uses the different chemical potential energy of vanadium ions in different oxidation states to save energy and make the active material in a circulating liquid state. The reduction battery has the advantages of high battery efficiency, deep discharge, easy maintenance, environmental protection and practicality, and the electrolyte can be recycled. It is considered to be a large-scale energy storage system with the most practical prospects.