This story about the Tesla Model 3 battery was originally published on EV Obsession
Until recently, Tesla has used 18650 lithium ion battery cells exclusively to power its two electric car models, the Model S sedan and Model X SUV. The nomenclature means each cell is 18 millimeters in diameter and 65 millimeters in length — just slightly larger than a standard AA battery.
Basically, a lithium ion battery has three components — an anode where lithium ions collect during charging, a cathode that sends electrons to an electric motor, and a chemical soup in between that allows the ions to transfer back and forth between the two.
Model S and Model X Battery Configuration
In the company’s 85 and 90 kWh batteries, there are 16 battery packs containing 444 cells each. For its 100 kWh batteries, Tesla reconfigured the cooling system so it could fit 516 cells into each of the 16 packs for a total of 8,256 cells.