The difference between series and parallel connection of batteries

Lithium battery series-parallel connection definition
Due to the limited voltage and capacity of a single battery, it is necessary to combine series and parallel in actual use to obtain higher voltage and capacity in order to meet the actual power supply needs of the equipment.
Li-ion battery series connection: The voltage is added, the capacity is unchanged, and the internal resistance is increased.

Lithium batteries in parallel: the voltage remains the same, the capacity is added, the internal resistance is reduced, and the power supply time is extended.

Li-ion battery series-parallel connection: There are both parallel and series combinations in the middle of the battery pack, so that the voltage is increased and the capacity is increased.

Series voltage: 3.7V single cell can be assembled into a battery pack with a voltage of 3.7*(N)V as needed (N: number of single cells)
Such as 7.4V, 12V, 24V, 36V, 48V, 60V, 72V, etc.

Parallel capacity: 2000mAh single cells can be assembled into battery packs with capacity of 2*(N)Ah as required (N: number of single cells)
Such as 4000mAh, 6000mAh, 8000mAh, 5Ah, 10Ah, 20Ah, 30Ah, 50Ah, 100Ah, etc.

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