What is 4680 Cylindrical Lithium Battery Cell?

The 4680 cylindrical lithium battery is a 46mm diameter, 80mm high battery with a cylindrical shape, named after its size, unlike mainstream square batteries. It is a battery produced by Tesla to significantly increase range, reduce production costs, and be used in future products with high power consumption, such as Cyber pickups and semi-freight trucks.

Advantages of 4680 cylindrical lithium battery

1. The dimension of 4680 cylindrical lithium battery is 5.4 times larger than the  21700 cylindrical battery, and the battery capacity increased five times, and the whole vehicleis range increased by 16%. The design of the electrodeless ear help the charging and discharging speed is increased by six times, and it expected to reduce the internal resistance of the battery to one-fifth of the original, and expected to reduce the internal resistance of the battery to one-fifth of the original.
2. 4680 cylindrical lithium battery with CTC program use, that is, the battery cell directly integrated into the chassis, improve the energy density of the battery system, the whole vehicle weight reduction, improve production efficiency, more room for optimization in the ride.

Disadvantages of 4680 cylindrical lithium battery

1. The 4680 lithium battery main drawback is that it is impossible to determine whether there will be increased internal heat dissipation, cell expansion, resulting in shortened battery life. 4680 battery has many advantages, but there are still the following difficulties in production: First, the lug welding technology is difficult for a low yield; second, dry electrode process threshold is difficult.
2. The 4680 cylindrical lithium battery in the cylinder inside the positive and negative electrode is relatively harsh, the internal heat dissipation of the cell is difficult, so there is a impact on the battery life.

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