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For more information, please visit electric bike connectors.
Li-ion Ebike batteries often have a built-in BMS (Battery Management System) or PCM (Protection Circuit Module) that prevents over-charge, over-discharge, high temperature or excessive current draw, and may also have a balancer to keep all the cell voltages equal. As the normal discharge current may be 40A or more, Some have a separate connection that provides extra protection for low current charging.
Here is an example:-
If you want to learn more, please visit our website higo z910 connector.
28S LiFePO4 Li-ion smart bms pcm for 28s battery pack
Cheaper batteries sold on eBay etc. might have direct connections to the battery for discharge and a low current BMS for charging, or the charge port might be connected directly to the battery and is for convenience only. Without seeing inside the pack it's impossible to say what a particular battery has if the supplier can't tell you. Buyer beware!
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