I have built my own BMS (Battery Monitoring System) that can control the SOH (State of Health) and SOC (State of Charge) of a LiPo battery. It can control every cell voltage (with passive cell balance), temperatures and current.
This BMS is powered by its LiPo battery and also gives supply to a Raspberry Pi (Control circuit) and gives supply to a load (Power circuit).
During the battery charge, I disconnect the power circuit. But the problem is that I don't want to disconnect the Raspberry Pi while it's charging because it does the cell balancing.
I want to buy a battery charger that gives me enough power and gives me the CC/CV curves too but doesn't do the cell balancing (my BMS does it). This charger lets me program this curve via USB.
Is it ok if I connect the charger to the battery directly with the Raspberry Pi connected? The charger has enough power for both, but I don't know if the CC/CV curve survives. Then:
1: Is the RaspberryPi a problem to the battery charger? (I can program the curve)
2: Is it a problem in general, for battery chargers, to charge a LiPo battery with a load attached?
3: What would be the best solution to this problem?
Thank you for your time.