What is the Tesla battery model number?

[JosephineLee]

Tesla uses 18650 batteries produced by Panasonic. After the official production of Model 3, the new 21700 battery will replace the 18650 as the new cell. Relevant details are as follows: 1. Ternary lithium battery: The 21700 battery is a ternary lithium battery with a cathode material of lithium nickel cobalt aluminum oxide (NCA). This cylindrical ternary battery currently offers the highest energy density solution for power batteries. Compared to prismatic batteries, although this type of battery has high energy density, its stability is relatively poor, requiring support from an excellent BMS (Battery Management System). 2. Energy density: Under current conditions, the energy density of the 21700 battery system produced is around 300Wh/kg, which is approximately 20% higher than the 250Wh/kg of the original 18650 battery system. Additionally, according to Panasonic's test data on power lithium battery cells, the volumetric energy density of the 21700 battery is significantly higher than that of the 18650-type battery cells. The improvement in energy density of individual cells far exceeds the 20% increase observed after grouping.