Professor Wang Chaoyang from Penn State University has made a major breakthrough in the field of rapid charging of lithium-ion batteries. The team achieved rapid charging of the power battery at any temperature through a new battery structure and charging strategy. Even at minus 50 degrees. In extreme environments, the technology is still capable of fast charging in 15 minutes and has an extremely long cycle life of more than 4,500. This technology sets a new industry benchmark for electric vehicle fast charging. The related results were recently published in the Proceedings of the National Academy of Sciences. Proceedings of the National Academy of Sciences (PNAS). PNAS is one of the most frequently cited journals in the world, including Nature and Science. It has a history of 100 years.
Fast charging is the most important means to achieve the popularity of electric vehicles. At present, all countries in the world are vigorously promoting the construction of high-power fast charging stations. It is estimated that by 2025, the global electric vehicle fast charging market will exceed 300 billion yuan. However, all current electric vehicles The actual charging speed is greatly limited by the ambient temperature. Professor Wang Chaoyang successfully developed a new battery structure and charging strategy. The battery contains a lightweight, low-cost internal heating structure, and intelligently controls the charging current through the switch. Flow direction. When the battery temperature is lower than room temperature, all currents automatically flow into the internal heating structure, causing the battery to heat up rapidly, and the temperature rise rate is up to 1 degree per second. When the battery is heated above room temperature, it will automatically switch to charging mode, charging process The battery temperature is always higher than room temperature, which effectively eliminates lithium deposition and achieves full climate fast charging. In the PNAS paper, the team used a 10 ampere-hour battery to conduct experiments, and the results showed that it could still be 15 minutes at minus 50 degrees. Filled with 80% of the electricity. Perform a fast charge life test at 0 degrees. The battery is still after 4,500 fast charge cycles. Maintained at 80% capacity, even if a battery charge every day, still has more than 12 years of life. The total discharge capacity cycle test in terms of mileage, the equivalent of 500,000 kilometers, far more than the life of the current fuel vehicles.
Professor Wang Chaoyang said, 'The full climate fast charge also solves the four major anxiety of electric vehicles, namely cruising range anxiety, charging time anxiety, cost anxiety and safety anxiety.' Currently, the technology has been recognized and commercialized by the US Department of Energy. Funding. Soon the team will continue to disclose 10 minutes of fast charge data.
