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In the future, Volkswagen's customized battery cells have also set several goals: energy density+40%, weight -30%, power density+50%, working temperature+35%, internal resistance -25%, and kinetic energy recovery performance+40%.
Comparing several different materials of batteries, Volkswagen Group believes that the advantages of lithium iron phosphate are its technological maturity and low cost, while the disadvantage lies in its range, making it the best choice for entry-level models; High manganese ternary lithium-ion batteries have certain advantages in terms of cost due to their low nickel content and no cobalt content. At the same time, their endurance is improved compared to lithium iron phosphate, which can meet the needs of most mainstream car models.
Although graphite negative electrode and nickel cobalt manganese positive electrode batteries are currently the mainstream, Volkswagen Group believes that silicon based negative electrode and solid-state battery are still the development direction, because charging time and range are still key to the development of new energy vehicles, and the current technological level of these two points has not yet met market demand.
The current charging level is full in 60 minutes and 80% in 35 minutes; The next step is to fully charge in 50 minutes and charge to 80% in 20 minutes; Solid state batteries can be fully charged in 20 minutes and 80% charged in 12 minutes, which will greatly improve the efficiency of electric vehicles.
In the entire chain of the battery industry, Volkswagen believes that the mining and chemical materials fields account for 80% of the cost optimization goals for battery cells, while the manufacturing process can reduce an additional 20%. From the industrial chain of raw materials, refining, precursors, positive electrode materials, batteries, vehicles, and recycling, Volkswagen hopes to achieve vertical integration and achieve a balance between buyers and sellers.
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