To create a 72V system, you typically need around 20 batteries connected in series, assuming each lithium-ion battery has a nominal voltage of about 3.
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It is important to use the same battery type with equal voltage and capacity (Ah) and never to mix different makes and sizes. A weaker cell would cause an imbalance. This is especially critical in a series configuration because a battery is only as strong as the weakest link in the.
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When using standard BMS, parallel connection of lithium batteries is not acceptable due to very likely damage to the BMS electronics (which may result in damage to the cells).
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This Li-Ion battery pack is maintenance free, and has a longer run time with a shorter recovery time than equivalent lead acid battery packs.
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