It seems to be a problem for solar based batteries with a 48V stack.Manufactureres say it's real tricky... temperature/charge rate/discharge rate blah blah. So why is it so hard to get an accurate SOC ? 0%= ~40/41V 100% =~57V ... A 12 bit ADC would yield 4mV resolution. Isn't that enough to get an accurate state of charge? My analogue experience is next to nil..If there is a real problem, how about 3 ADCs each measuring low middle and high voltage? i.e 40-45;46-51;52-58 or is that a stupid idea ?
9 months ago