Abstract: The high-power operation characteristics of fast charging stations aggravate the risk of power grid instability, which becomes the bottleneck restricting the large-scale application of fast charging stations. On this background, the application mode of fast charging stations with energy storage is proposed. Aiming at the transient problems such as frequency and voltage support caused by the two-way integration of charging and storage network and distribution network, and the long-term dynamic stability problems such as peak-shaving and valley-filling, a multi-time scale simulation model of battery energy storage system is proposed, and the control strategies of each component module are studied. Firstly, the power decoupling control method is used to maximize the regulation ability of the energy storage system. Secondly, to enhance the ability of automatic detection, rapid adjustment and precise control of the energy storage system, the additional frequency control and voltage control links are added to the simulation model, and limiting constraints and operation dead zones are set. Finally, based on an example of the fast charging station with energy storage in the regional distribution network, the simulation model of energy storage system and the effectiveness of its control strategy are verified and analyzed.