With the new 4680 cylindrical cells, a typical battery pack can achieve high system voltages even if 3 to 5 cells are connected in parallel. In addition to the 4680 cell initially announced by Tesla, other cell formats are currently being discussed, with heights ranging from 40 to 120 mm.
A 46 mm cell with 80 mm height, for example, has an internal volume of about 120 ml. A cell of the "blade" type from the manufacturer BYD has a volume of just under 1.2 liters. Figure 1: 46 mm diameter battery cells are on the rise worldwide.
Due to the small number of individual cells in large-format batteries, it is not possible to achieve such high system voltages when connected in series. With the new 4680 cylindrical cells, a typical battery pack can achieve high system voltages even if 3 to 5 cells are connected in parallel.
Although no corresponding projects for the development of 46 mm cylindrical cells based on LFP have been communicated by cell manufacturers in the automotive sector to date, comparably sized cells have been available for some time and are used in applications outside the automotive industry.
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