I've been trying to understand how the Bms systems work with chargers. I've seen a couple of Bms systems that monitor cell voltage and shunt charger power into resistors when voltage is >3.7v This seems like a waste of power, especially with limited resource like solar. I also looked at Thunderstruck system which turns off charger if voltage goes high in any cell.
It seems like a better system would monitor each cell and if voltage went high the cell balancer would SHUT OFF power only to that particular cell and keep charging the rest
till they all shut off in thier own time. A simple voltage controlled switch and relay would accomplish this wouldn't it?
Am I missing something or this the basics of a BMS system?