Abstract: Aiming at the problems of the low operation efficiency and control difficulty of the energy storage system with echelon utilization batteries, a segmented control strategy for energy storage system with echelon utilization batteries based on the improved rain-flow counting method is proposed. Firstly, the photovoltaic-storage charging station is designed as the echelon utilization scenario, and the segmented energy demand of energy storage system is modeled in the combined mode of power smoothing and load shaping. Secondly, the difference in energy demand of energy storage systems is considered for the hierarchical utilization of retired batteries, and a segmented control mode of energy storage system with echelon utilization batteries is proposed. Then, considering the impact of estimation error of state of charge on the segmented control effect of energy storage system, a segmented control idea based on the rain-flow counting method is proposed, and the probelm of time loss and interval overlap in the rain-flow counting method is improved. Finally, the proposed segmented control strategy and the existing control strategy are simulated and compared in MATLAB. The results show that the proposed strategy can optimize the internal power distribution of the energy storage system with echelon utilization batteries, and enhance its control effect.