I have an idea that I am trying to explore. I use 48V headway cell packs to power my various electric bicycle projects. Trying to balance charge a 16s pack can be a problem. I had the idea of using less expensive single cell charging boards, that way every cell would be charged to the right level, no stopping the charging process by the BMS when a cell gets too high.
I purchased some of these to test with, PCB single cell charge board , but before I try to install them I thought, shouldn't these be isolated?
Is it as simple as adding the appropriate diode on one side of the charge board (like on the right in my awesome drawing)? Or do you need a diode on each side of the charge board? And if this is the case.. what diode should I use?
With this setup also, a smaller 5V PSU with enough amps could be integrated into the pack also so it can be charged anywhere.. you dont need a big charger at a location.
The Arduino in the picture is just an idea. It would monitor pack and cell voltages like a BMS. I think the overall cost on this would be more than a BMS and a charger, but I think the benefit from it would be much greater!