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By the end of 2027, China will have more than 100,000 high-power charging facilities installed nationwide. What could be the potential technical difficulties arising from the large-scale promotion of these high-power facilities? Will they really alleviate the "charging anxiety" experienced by the owners of electric vehicles (EVs)? Science and Technology Daily (S&T Daily) spoke to several experts in this field to get the answers.
High-power charging stations (HPCs) are charging stations EVs that provide significantly faster charging speeds than the standard Level 2 chargers or DC fast chargers. "These facilities typically offer charging power ranging from 600 to 1000 kilowatts," said Wang Jiaojiao, director of the Charging Technology Department at China Automotive Technology & Research Center Co., Ltd.
"The core goal of high-power charging facilities is to significantly reduce the charging time, making the energy replenishment experience similar to the speed of refueling traditional fuel vehicles," Wang said.
S&T Daily reporters visited the Lianhuashan Super Charging Station in Shenzhen in south China. The station has four supercharging points with a maximum charging and discharging capacity of 600 kilowatts. At maximum capacity, it can charge and discharge at a voltageization speed of one kilometer per second. This means a car can be charged over 80 percent in just 10 minutes. Wang thinks HPCs will significantly reduce the waiting time for EV owners. When traveling long distances, they can recharge their EV battery at the service station while having a short break.
Ensuring charging safety is a key issue. While supercharging, large currents generate significant heat. One of the core difficulties in promoting HPCs is to address the problem of dissipating the heat issuing from the charging gun wires, connectors and battery packs under ultra-high currents, and prevent overheating and fire.
To ensure the safety of such facilities, correct installation must be prioritized. Electrical codes must be followed and preventative maintenance implemented, with safety features such as surge protection integrated. It is also vital to ensure proper spacing between charging stations, sufficient overhead room for fire suppression systems, and placement away from flammable materials or potential wildfire areas.