Comparative analysis of technology and economy on echelon battery energy storage

China is one of the largest consuming country of power battery in the world. Large-scale of power battery decommissioning occurs every year. It is of great significance to do well in recycling and echelon utilization of such batteries. In this paper, by analyzing the cost composition of echelon battery energy storage and using the method of LCOE to compare and analysis the technology and economy of conventional and echelon utilization on lead-acid and lithium battery energy storage, so as to provide preliminary suggestions for the further construction of echelon battery energy storage.