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Recently, with the rapid development of new energy electric vehicles, aiming at the application environment that is not conducive to the use of vehicles such as short driving range and slow charging time, the state and local governments have put forward the concept of building a "supercharged city" around this pain point, aiming to solve the anxiety about the driving range of electric vehicles and accelerate the high-quality development of electric vehicles. In order to better meet the needs of the public to purchase and use new energy vehicles, the world's leading city-level new energy vehicle charging network will be built. For example, Shenzhen proposed that the Shenzhen Municipal Development and Reform Commission issued and implemented the Special Plan for New Energy Vehicle Overcharging Facilities in Shenzhen (2023-2025) (hereinafter referred to as the "Plan"). The plan puts forward the objectives and requirements of Shenzhen's supercharging infrastructure construction: strive to build no less than 150 public supercharging stations by the end of 2023; By the end of March 2024, no less than 300 public supercharging stations will be built, and the ratio of vehicle-pile and supercharged pile of public charging piles will reach the world's leading level. By the end of 2024, a supercharging facility service system with global leading technology and multiple coverage of scenarios will be built, and the interactive mechanism for power demand allocation of "power charging, storage and storage" will become increasingly mature, accelerate the formation of ecological advantages such as enterprises, technologies and scenes, and establish the brand image of "Shenzhen Supercharging". By 2025, the formation of "car energy road cloud" in-depth integration of the development of industrial ecology, help Shenzhen products and services to open up domestic and foreign markets, promote Shenzhen new energy vehicle production, supply and marketing of domestic and foreign trade integration of high-quality development, to create a world-class "supercharged city". The plan clearly defines the principles of Shenzhen's supercharge infrastructure construction: first, moderate competition. With the unified spatio-temporal information platform of "Power charging and storage", a mechanism for sharing information on supercharging services is established, and comprehensive evaluation and application of the whole industry are carried out to promote the sound development of the industry. Second, it should be built to the fullest extent. The scenario of greatly increased penetration rate of new models of supercharge will be taken into account, and on the basis of tapping the potential of the current situation, it will cover the city's high-level comprehensive transportation hubs and important urban places as much as possible, and moderately forward-looking planning and construction of supercharge facilities. Third, extensive coverage. Comprehensively consider the scale and charging scenarios of various types of new energy supercharging models, rationally plan the spatial layout of supercharging facilities, improve the coverage rate of supercharging facilities, improve the convenience of charging and facility utilization, and prioritize the construction of a "1km supercharging ring" in the central urban area. The liquid-cooled charging pile refers to the use of liquid-cooled cooling technology, set up a special liquid circulation channel between the cable and the charging gun, and add the liquid cooling liquid used for heat dissipation in the channel, promote the coolant circulation through the power pump, and take away the heat generated during the charging process to improve the cable transmission power and achieve high-power charging. Compared with the traditional direct air heat dissipation method, the liquid cooling heat dissipation can completely isolate the inside and outside of the module, avoid the internal electronic devices and the outside dust, salt spray, water vapor, flammable and explosive gas direct contact, can increase the protection level to IP65, better safety.