We all know that the series voltage of lithium batteries increases, and the parallel capacity increases. How to calculate how many series and parallel lithium batteries are composed of? Before calculation, we need to know what specification of the battery cell is used for the assembly of this lithium battery pack. Because different cell voltage capacities are different, the number of series and parallel required for assembling a lithium battery pack of a specific specification is different. Common types of lithium battery cells on the market include 3.7V lithium cobalate, 3.6V ternary, 3.2V lithium iron phosphate, and 2.4V lithium titanate. The capacity varies with the size, material, and manufacturer of the battery cell. Take 48V 20Ah lithium battery pack as an example

　　Assume that the specification of the single cell used is 18650 3.7V 2000mAh

　　Assume that the specification of the single cell used is 18650 3.7V 2000mAh

　　Number of parallel electric cores: 20Ah/2Ah=10, i.e. 10 parallel (10 electric cores in parallel)

　　The whole battery is 13 strings × 10 electric cells=130 electric cells

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