What is the innovative process of 4680 battery?

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.

What is a 4680 battery?

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.

What is the capacity of a 4680 cell?

A cylindrical cell that is 46mm in diameter and 80mm high. Capacity tests : 26.5Ah (estimate based on 21700 5Ah volumetric energy density) and this fits with capacity of the Model Y pack that uses this cell. The Laboratory for Energy Storage and Conversion carried out the testing and data analysis of the two 4680 cells reported in this article.

What is the difference between 4680 and 2170 based battery pack?

The 4680 cell-based battery pack will be much simpler and cheaper to build. The 2170 based battery pack architecture is made of cells divided into 4 modules and further into bricks of 46 cells each and every module requires is own controller circuit.

What chemistry does a Tesla 4680 battery have?

It appears to be an NCM 811 chemistry with very good energy density and total energy estimated at 96-99 Wh. In the second part of the Tesla 4680-type cylindrical battery cell teardown and analysis, The Limiting Factor presents the initial specs and findings.

How do you cool a 4680 cell based battery pack?

Fig 6: 4680 cell-based battery pack to have the coolant tubes under the cells, not on the sides like the current 2170 cell-based batteries. According to Sandy Munro, the right way to cool down the batteries is from top and bottom.