Traditional fuel vehicles emit large amounts of harmful gases, especially carbon dioxide. These gases will pose a huge threat to the ecological environment. With the emergence of electric vehicles (EVs), this problem has been alleviated and EVs have received more and more attention. Digital twin (DT) in EVs serve a pivotal role by creating a virtual model of a vehicle that mirrors the real-world vehicle. This technology enables real-time DT monitoring and diagnostics in all phases of EV production and operation. It permits the collection of data and analysis on how specific vehicles perform in different circumstances without physical testing. Therefore, the introduction of DT will bring significant potential for the development of EV. This paper explores the critical role of DT technology in EVs, specifically focusing on battery management systems, vehicle health monitoring, and propulsion drive systems. This will give readers a basic understanding of the DT technology and its potential future application in EVs.