All lithium battery packs are combined by a single lithium battery according to voltage and capacity requirements;
For example, the voltage of a single lithium battery obtained is 3.5V and the capacity is 2000mAh, then 12V. voltage is required, 4 batteries can be connected in series to meet the voltage requirements, and the capacity is still 2000mAh = 2Ah, what is a series
A 30 Ah lithium battery needs a series of 30/2 = 15; be connected in parallel to form a battery;
A total of 4*15=60 single lithium batteries are required.
For reference.