To address the sudden swap requests caused by the uncertain behaviors of electric vehicle(EV) users,a mechanism for characterizing the response capability and implementing real-time management of battery swap stations(BSS) based on the energy domain is proposed. Firstly,an energy domain model for the BSS charging warehouse is constructed to dynamically characterize the fluctuations in the state of charge(SOC) of the internal battery packs. Subsequently,by adjusting the boundaries of the energy domain through equivalent charging periods,the real-time response capability of the BSS to sudden load demands is quantitatively evaluated. Finally,integrating user requirements and the station's internal status,a phased optimal management strategy for burst loads is implemented,employing swap guidance and partial/non-full response schemes. Simulation results demonstrate that the proposed mechanism can accurately track the dynamic SOC within the charging warehouse,effectively evaluate and enhance the BSS’s capability to respond to burst loads while ensuring regular demand,and optimize the load distribution among multiple EV charging and swapping stations.
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Arturs Purvins,Mark Sumner.Optimal management of stationary lithium-ion battery system in electricity distribution grids[J].Journal of Power Sources,2013.