The 4680 battery is Tesla’s self-developed battery.
The 4680 battery means the newly launched battery of the Panasonic brand Tesla series, named 4680 battery. Ternary polymer lithium batteries are ternary lithium batteries that use lithium nickel cobalt manganese or lithium nickel cobalt aluminate as the cathode material.
The volume of the 4680 battery cell is 5 times that of the 21700. According to the situation category from 18650 to 21700, it is normal for the capacity to increase by 5 times without considering other technical improvements. So Tesla is very honest when he says that the energy is increased by five times (ENERGY5X). It may actually be about 5 times.
The performance role of ternary lithium batteries
A material that is relatively balanced in terms of capacity and safety. Its cycle performance is better than that of normal lithium cobalt oxide. In the early stage, due to technical reasons, its nominal voltage was only 3.5-3.6V, there are limitations in the scope of use. With the continuous improvement of the formula and the improvement of the structure, the nominal voltage of the battery has reached 3.7V, and the capacity has reached or exceeded the level of lithium cobalt oxide batteries.
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