Who is Tesla's Battery Supplier in China?
1 Answers
Tesla's battery supplier in China is Panasonic. Below is relevant information about Tesla batteries: Battery Model: Tesla uses the 18650 battery produced by Panasonic. After the official production of Model 3, the new 21700 battery replaced the 18650 as the new cell. 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 among power battery solutions. Compared to prismatic batteries, although this type of battery has high energy density, its stability is relatively poor, requiring excellent BMS (Battery Management System) support. Battery Energy Density: Under current conditions, the energy density of the 21700 battery system 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 for single lithium-ion power batteries, the volumetric energy density of the 21700 battery is significantly higher than that of the 18650 battery cell. The improvement in energy density of a single battery cell far exceeds the 20% increase observed after grouping.