BMS for Lithium ion battery

Selecting BMS is not only dependent on the battery amps or Ah. It also depends on several other parameters like maximum charging current, maximum discharging current of the battery, peak current i.e. by what rate we can charge or discharge our battery like 0.5C or 0.8C or 1C. This capacity C rating is provided by the battery provider.

So it is better to know the maximum charge and discharge current we want from our battery.

Finally, yes you can use 45 Amp BMS but have to take care of the charge and discharge current for that battery pack. Usually 50amp BMS is used in 2 wheeler low speed electric scooters.

Still have any doubts comment below or direct mail me.