Abstract With the development of electric vehicles, charging stations have garnered significant attention and progress. As a result, various charging platforms have emerged. However, due to the lack of shared charging information, issues such as low utilization of charging stations during peak hours and insufficient station availability have negatively impacted user experience. Inspired by the concept of an aggregation platform, we propose an aggregated charging platform for electric vehicles (EVs). However, challenges related to trust, such as single-point failures and the difficulty of achieving unified identity management, hinder the implementation of the aggregation model. To address these issues, we propose a blockchain-based EV aggregation charging platform model and a cross-platform identity authentication scheme. Leveraging the decentralized and highly secure characteristics of blockchain, we construct a decentralized aggregation platform and enhance the credibility and reliability of cross-platform authentication through smart contracts. Furthermore, we design a batch authentication scheme to efficiently handle a large number of authentication requests. Simulatio
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