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Battery storage is one of the important units in the optimal scheduling of integrated energy systems. To give full play to the advantages of battery storage in stabilizing power quality and smoothing the output of intermittent new energy generation, the battery life decay problem needs to be considered in optimal scheduling. In this paper, we studied the energy storage life decay model and established an electric–gas integrated energy system model considering energy storage life decay to minimize the economic cost of system operations and to compare the optimal dispatch results with and without energy storage life decay through simulation analysis to verify the rationality and economy of the energy storage life decay model used in this paper.