Electric vehicle sharing is the development trend of transportation in the future. Applying the battery-swapping mode to electric vehicle sharing can solve the problem of battery uniformity while maintaining its advantages of convenience in power exchange, and has good development prospects. In this paper, the battery warehouse managed by a shared electric vehicle operator under battery-swapping mode is studied, and a bi-level programming model for energy optimization management is proposed. The upper layer optimizes the charging and discharging power of batteries with the goal of minimizing the cost of the battery warehouse, and the lower layer models the battery warehouse participating in the process of clearing the power market. Based on KKT conditions and strong duality theory, the model is transformed into a mixed integer linear programming problem to be solved. An example is used to analyze the bidding and energy management strategies of the battery warehouse. It is verified that the model proposed in the paper can reduce the operating cost of the battery warehouse while meeting the battery needs of shared users.