Research On Diagnostic System And Sharing Strategy Of Charging Pile Battery Combined With Blockchain

In recent years,with the strong support of national policies and the advancement of related lithium battery technology,electric vehicles have developed from a market introduction period to a fast-growing stage,and local areas have experienced explosive growth.However,with the increasing popularization of electric vehicles,the electric vehicle charging market is facing increasing challenges:the frequent occurrence of electric vehicle charging safety accidents,the growing gap between car piles,the difficulty of using retired car batteries and the rapid growth of the number of private charging piles that are underutilized.In order to solve these problems,this article designs a smart DC charging pile system that can diagnose the power battery in the daily charging pile process based on the current common DC fast charging piles.Collecting battery data based on CAN data communication and special charging steps.The battery health status is analyzed by the DC internal resistance and battery consistency algorithm.Combined with the blockchain technology,the power battery data sharing and data upload are realized.Finally,the feasibility of the application of blockchain technology in the charging pile sharing economic model was explored.The main contents of this article are as follows:(1)A set of DC fast charging pile system with power battery diagnostic function was designed.STM32F107 was used as the main controller to develop and design a one-button diagnostic module.The battery information was obtained through a special charging logic design,and a data interface was established to implement Data communication.At the same time,upload the data to the cloud platform to analyze and calculate the DC internal resistance and return the diagnosis results.(2)A health battery consistency diagnosis algorithm based on DC internal resistance and 3sigma principles was proposed to analyze the health status of power batteries.The HPPC experiment was simulated during the charging process,the charging pulse was increased,and the DC internal resistance of the power battery was calculated.The accuracy of the diagnostic algorithm was verified through experiments.(3)A power battery life cycle data monitoring and sharing system was established based on Hyperledger Fabric.The system generated the MD5 code of the battery data report based on the smart contract and entered it into the blockchain as a digital summary.The use of the characteristics of the blockchain system ensured that the data was non-tamperable,secure and traceable.(4)A new and innovative service model was proposed,and the application model of the blockchain technology in the charging pile sharing economy was explored.Through the blockchain technology,the distributed and the peer-to-peer transaction of the charging pile sharing platform was better realized,and the decentralization,security,and user privacy of the transactions in the sharing process were guaranteed,providing a good formula trust mechanism for multiple parties.For shared charging platform,a complete set of the front-end operation logic and the operation pages were designed,which provides a very valuable idea for the actual implementation of the blockchain technology.