Parallel and series connection of dissimilar amp hour LiFePO4 - best practices

[derekisastro]

Yes, it will be practical. But if we want to put these battery pack in one case, will need to parallel their own BMS, maybe it seems too troblue. ?

Each battery that you make and connect in parallel (ideally with a parallel bus) will have its own, independent BMS. There is no need or desire to 'parallel' the BMS's. Each BMS will connect each battery to the parallel bus, that's it.

If you are asking about using a single BMS on parallel connect batteries (that is, you have a BMS after the parallel connection/bus) then that's a different question/situation. I doubt many here would recommend that approach.

 

[Blue Sky]

I think you'll have fewer issues with the higher quality cells.

Thanks for your kind advice.