Boundary conditions were of course a great test. At a SG of 1.000 volts are 0 so of course this is way off as you take it out of normal operating ranges. Good approach.
I wonder if there is a better formula that actually correlates specific gravity to voltage. I assume it must be a curve rather than a linear relationship.
The paper shows charge *pretty* linear down to 2 molar acid, then it avalanches.
Ok so it's a log function.
Voltage= voltage at 1 molar acid concentration (say 11.7v) + 26mV*ln(molarity of acid)
At normal temp and for a battery where it is 11.7v being discharged down to a molarity of 1.
Jim
