What can you do in 5 minutes? Drink a cup of coffee, read an article, or replenish the energy of a new energy vehicle for 200 kilometers? High power charging is becoming one of the important paths to improve the efficiency of new energy vehicle replenishment.
In 2019, Porsche Taycan launched the world's first 800V high-voltage electrical architecture with an 800V DC fast charging system and support for 350kW high-power fast charging. Subsequently, the high-voltage fast charging route technology route has quickly gained the favor of car companies.
Over there, first Hyundai, Kia and other international giants released 800V platform one after another. On this side, domestic car brands are also not shy to carry the high-voltage fast charging solution of the Polar Fox Alpha S, Avita 11, Xiaopeng G9, Great Wall Mecha Dragon, EAN V Plus models are also listed in 2022.
A new energy vehicle replenishment system with "charging as convenient as refueling" seems to be on the horizon.
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However, it is important to note that the realization of high-power fast charging relies on the collective support of a technology cluster, and for each link in the new energy vehicle industry chain, it is a big project that "involves a hair and moves the whole body".
In a research report, Tianfeng Securities believes that the improvement of charging rate relies on the continuous breakthroughs in cell materials, internal structure of cells, module design solutions, battery pack design solutions CTP, and battery management system BMS. At present, the mainstream power pack can already support 2C charging rate, up to improve similar to the barrel effect, need to continue to break through the technical short board.
In many "boards", safety is undoubtedly the most important piece. From the perspective of new energy vehicles, frequent high-power fast charging will affect battery life and safety, in addition, there are high-voltage motor bearing electric corrosion, EMC and insulation safety problems.
Recently, a seminar on "High Power Charging Research and Scenario Application" co-organized by China Electric Vehicle Council of 100 and World Resources Institute was held in Beijing. At the meeting, participants discussed issues related to the safety of high-power charging.
What are the safety pain points of high-power charging? What is the development of related technologies? In the future, in what ways can the safety of high-power charging be improved? These are the questions that this paper is dedicated to answer.
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