Resistance is Futile.
Can someone that's in the Battery business quantify for me with numbers the type and measurement of Wet Cell lead acid battery recharging resistance, for the various types... sealed, AGM, etc. I am...
Forum Discussion
ken white wrote:
The battery makes a perfect Thevenin model.
So, measure the open circuit resting voltage (Voc).
Connect a known resistive load (Rl) across the battery terminals.
Measure the loaded battery voltage across the load (Vl).
The internal resistance of the battery (Rb) = Rl*(Voc/Vl - 1)
Oops, I reread your post and you would need to test the SG and then measure for Rb at various SG and then plot.
With that said, the resistance of the battery increases over time and the curve will change shape slightly too, so this might really be futile...
Ken you must be an EE (MSEE) like me (I work for a large defense electronics contractor). No one else would know about Thevenin models.
Dick
