With the advancement of the “dual-carbon” goals and the acceleration of new power system construction, the penetration rate of renewable energy has significantly increased. The large-scale development of electric vehicles (EVs) has also profoundly impacted the load structure of traditional power systems. To address interaction challenges among the power grid, EVs, and energy storage batteries, a distributed energy storage-integrated bidirectional converter topology for EV charging piles is proposed. The converter employs NPC three-level converters, dual active bridge (DAB) converters, and Buck-Boost bidirectional converters to interface with the grid side, EV side, and energy storage side respectively, enabling bidirectional energy interaction among the three. Based on a distributed control strategy, decoupled control methods for grid-side, EV-side, and energy storage-side are designed to avoid power regulation conflicts among controllers and achieve efficient collaborative system operation. Simulation results demonstrate that the proposed converter maintains normal operation during both steady-state and transient processes, effectively alleviates grid pressure, enhances charging efficiency, and validates the correctness and effectiveness of the proposed topology and control strategy.