since there is no longer good source of high quality pouch flat type Li ion cells, I am considering to use high new smartphone batteries from service packs.
I need bigger capacity - about 10 - 20 Ah, so using 4Ah cells I am on 3 -5 cells in parallel. I am using single cell scenario - 3S1P or 5S1P.
Are there any drawback in charging all these cells in parallel with original PCM? I know that PCM will disconnect each battery randomly during charge and discharge. It seems that during charge I need charger with 4 A charge current max to fully protect case that only one cell`s PCB is allowing to charge.
Am I missing something?
P.S.: I dont want to remove PCMs from these pouch type batteries, soldering can be quite tricky and dangerous on these soft plastic packages...