Why did Tesla phase out 18650 lithium-ion batteries?

The 18650 is a standard lithium-ion battery model set by the Japanese SONY company in order to save costs. As a traditional battery cell, the 18650 has relatively mature technology and strong adaptability. It can be used in 3C digital, drone, and electric Digestion in fields such as tools is the earliest commercialization, the highest degree of processing automation, and the lowest cost of power lithium batteries. The 21700 lithium-ion battery is a new model developed to meet the requirements of electric vehicles for longer mileage and to improve the effective utilization of vehicle battery space. After the 18650 model is switched to the 21700 model, the battery cell capacity can reach 3~4.8Ah, which is greatly increased by 35%, and the number of batteries required under the same energy can be reduced by about 1/3. The energy density of the 21700 battery system is 300Wh/kg About 20% higher than the 250Wh/kg of the 18650 battery system. The 21700 power lithium-ion battery system is priced at US$170/KWh, compared with the price of the 18650 at US$185/KWh, the price drop can reach 8.1%. The cost of the 18650 system is about US$171/KWh. After switching to 21700, the system cost can be reduced by about 9%, reaching US$155/KWh. This performance is pretty good. The 21700 battery has a higher energy density than the well-known 18650 battery, and the cost will be reduced after grouping. Overall, the 21700 maintains the high reliability and stable performance of the 18650 battery, and the battery performance is greatly improved compared to the 18650 in all aspects. The power density of the 21700 battery is currently the highest in the world, and the price will be more approachable. With the rapid development of the new energy vehicle market, domestic battery manufacturers have sharp eyes. Although the 18650 has accompanied Tesla's rise, as far as current data is concerned, the 21700 battery can indeed better meet the battery performance requirements of electric vehicles. These obvious advantages of the 21700 battery, coupled with Tesla's industry influence, predict that this battery is likely to become the next cylindrical battery development trend. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.