With the EV infrastructure being constantly mentioned in the past two to three years, various governments have put forward policies to encourage construction, such as China, the world's largest EV market, put forward the "Implementation Opinions on Further Enhancing the Service Guarantee Capability of Electric Vehicle Charging Infrastructure" in 2022, which focuses on fast-charging network and requires that the coverage rate of fast-charging stations in the National Ecological Civilization Pilot Area and the highway service area of the key area for the prevention and control of air pollution should not be less than 80% by 2025. The European Union proposed a 25 billion euro infrastructure grant in 2021 to strengthen the construction of public DC charging piles, aiming to complete one million DC charging piles of 150KW or more by 2025, and 250 million euro has been confirmed for implementation by April 2023; in the U.S., in addition to the 10,000 DC charging piles built by Tesla at more than 3,000 stations, Tesla is also building a new charging system for electric vehicles. In the U.S., besides Tesla, which has already built more than 17,000 fast charging piles in over 3,000 stations, the U.S. government has also allocated 7.5 billion U.S. dollars in 2022 to plan for the construction of 500,000 fast charging piles with 150KW or more before 2025. It is not difficult to see that in the face of two major obstacles to the promotion of EVs, namely charging stations and slow charging speeds, regional governments are using rapid deployment and high-power DC charging piles to solve the problem.