Dissecting the Tesla 4680: A Deep Dive into the
This article delves into the key design features, manufacturing intricacies, and material choices of the 4680 cell, drawing comparisons
The 4680 battery cell is 46 mm in diameter and 80 mm in height, making it 5.5 times larger in volume than 21700 cells and eight times larger than 18650 cells. A relative comparison of the dimensions of 4680 cells to the conventional 18650 and 21700 cells is shown in Figure 2. Figure 2. Cell format evolution.
The cells are from five established manufacturers (Sony/Murata, Panasonic/Sanyo, LG, Samsung SDI, and Tesla). The 4680 battery cell was taken from a Tesla vehicle and produced by Tesla itself. The investigated cells and their nominal capacity are listed in Table 1. Table 1. Investigated battery cells.
The specific 4680 battery chemistry can vary depending on the manufacturer, with some utilizing traditional Lithium-ion (4680 lithium ion battery) and others exploring Lithium Iron Phosphate (4680 lfp battery) options. Several factors contribute to the excitement surrounding 4680 battery cells.
Introduced during Tesla's Battery Day in 2020, the 4680 cell format promises higher energy content and power capability. Four years later, this battery format has only been integrated into some Tesla vehicles produced at Gigafactory Texas, such as the Model Y and the Cybertruck. The production of 4680 cells has encountered significant challenges.
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