Judging from the results achieved by CATL, both lithium iron phosphate batteries and ternary batteries can achieve fast charging but affect product performance. This will undoubtedly greatly improve the application of lithium-ion batteries in electric vehicles, and also provide other battery companies with Reference and reference.

　　Improving the energy density and fast charging performance of power batteries is considered to be a feasible way to relieve consumers’ anxiety about mileage.

　　Under the pressure of linking the amount of subsidy to energy density, a large number of domestic power battery companies have achieved a substantial increase in energy density by improving the material system and lightweighting of PACK. The system energy density of 140wh/kg has become a norm. . However, no major breakthrough has been made in the fast charging performance of power batteries.

　　A few days ago, a special seminar on high-power charging of electric vehicles was successfully held in Ningde. During the conference, CATL showed the participants the charging process of the EnerSpeedy Super Lithium Lithium battery using the "Super Lithium Iron + High Energy Density Fast Charging Graphite" system. This product is a 60Ah super lithium iron battery that can be charged at 5C. The demonstration process took 7 minutes and 12 seconds to complete 20% to 80% charging, and 20% to 100% charging took only 13 minutes and 8 seconds.

　　It is understood that the system energy density of CATL super iron-lithium battery 5C fast energy product is above 70Wh/kg, 3C high energy product is above 115Wh/kg, and the cycle life can reach 10,000 times. At the same time, CATL has also developed a ternary system of fast charging batteries, which can charge the SOC from 5% to 85% within 15 minutes, with an energy density of 190Wh/kg, and a cycle life of more than 2500 times. The next step is to ensure 4C fast charging. The density can continue to increase to 210Wh/kg.

　　Dr. Wang, the head of the CATL fast charging project, explained that the focus of fast charging is on the negative electrode, and for the choice of positive electrode, whether it is ternary or lithium iron phosphate, it will not affect the performance of fast charging, and its reliability. .

　　Therefore, CATL adopts the "fast ion ring" technology to modify, the modified graphite takes into account the characteristics of super fast charging and high energy density, and no by-products appear in the negative electrode during fast charging, so the insertion speed of lithium ions in the graphite layer is greatly improved. So as to achieve excellent rate performance, high energy density and long cycle life.

　　Judging from the results achieved by CATL, both lithium iron phosphate batteries and ternary batteries can achieve fast charging but affect product performance. This will undoubtedly greatly improve the application of lithium-ion batteries in electric vehicles, and also provide other battery companies with Reference and reference. Among the new energy vehicles currently entering the recommended catalog, the fast charging rate of fast charging models is basically below 5C, indicating that the fast charging performance of domestic power batteries needs to be improved. Once a breakthrough can be made, I believe that China’s new energy vehicle market There will be a real outbreak.