Conclusion The core innovative process of 4680 battery is: large battery cell + tabless + dry battery technology. This enhances battery power and safety, improves production efficiency and fast charging performance, reduces battery cost, and has room for further improvement in energy density and cycle performance.
4680 battery greatly improves battery power (6 times that of 2170 battery), reduces battery cost (14% of 2170 battery), optimizes heat dissipation performance, production efficiency, and charging speed, and energy density and cycle performance have room for further improvement. Part 2. Structural change of 4680 battery
At the end of 2023, the 4680 battery chemical composition ratios in Cathode material was NMC 811 (80% Nickel, 10% Lithium, 10% Cobalt). However, Tesla is finishing the process of transitioning over to NMC 955 now that we are in 2024. They are also trialing asymmetric lamination with one side of the laminated material thicker than the other.
4680 battery actually has three different positive electrode materials: iron-lithium, nickel-manganese-aluminum, and high nickel. 1) 4680 battery is currently mainly in the direction of high nickel The 4680 high nickel version is Tesla’s current main direction, and will be used in the Cyber truck and Semi with high battery life in the future.
The 4680 battery has the potential to significantly reduce production costs by streamlining the manufacturing process and using more abundant raw materials. This cost-efficiency is crucial for accelerating the adoption of electric vehicles and renewable energy storage solutions. 3. Thermal Efficiency:
The 4680 battery implements tabless (cutting the tab directly from the positive/negative electrode). This greatly increases the current path and shortens the tab spacing, thereby greatly increasing the battery power. 2. Advantages of tabless battery