Hi All,

I have four identical 18650 Li-ion batteries 3.7v \ 2500mAh and a BMS 2S.
My goal is to get 5v (with step down) and more current capacity. so I though of connecting the batteries as 2P2S as battery university suggested.
2P because the Li-ion will balance themselves and for more capacity
2S for getting more voltage

Is it correct \ safe to say that the BMS will treat each 2P as one cell? and make a good protection from over\under voltage?




Thanks

 

That appears consistent with the instructions to which you linked. Yes, the BMS will treat the 2P batteries as one.

 

Just be aware that, if the BMS was designed for 1P2S, it will take twice as long to charge.

Bob

 

Just be aware that, if the BMS was designed for 1P2S, it will take twice as long to charge.

Bob

How can you tell how if the BMS designed for 1P or 2P or xP? all of the BMS I saw was telling only about their S part..

 

The question is how much current it provides. For a single 18650, that would be about 1-2 A.

Does the BMS have a settable charge current?

Bob