Blockchain based Billing System for Electric Vehicle and Charging Station

Research related to electric vehicles (EVs) is mainly focused on hardware such as battery charging method, and there is still a lack of software (service oriented) research such as billing system that needs to be developed realistically. The result of the charge measured in the charging EV can be different from the charge amount claimed to be charged in the charging station. This is because the charge is measured separately from each other using its smart meters. And if mechanical measurements are assumed to be accurate, it is possible to lie in one of the EV or charging station. Also, billing information can be manipulated. To prevent those problems, this paper proposes the blockchain based billing system. The EV and the charging station store the billing information in the blockchain after mutual authentication and prevent the modification. A blockchain is the system in which all nodes have the same ledger, therefore cannot be tampered with. This prevents a user from modifying the record after charging.