Measuring V loss during charging
I know that a discharged battery can pull down the voltage at the charger. I was trying to measure voltage loss in my converter wiring, switches, etc. The two 105 AH batteries were 12.13v prior to ...
Forum Discussion
Snowman9000 wrote:
So in my example, some part of the resistance is coming from the battery, right?
Battery resistance is a bit more difficult. You have two items to consider. The voltage potential pushing back and the actual resistance. Often considered together and battery resistance is said to increase as the battery charges and the amps taper. Actually the resistance is dropping but the voltage potential is increasing. Eventually the voltage potential of the battery will equal the supply and the current virtually stops. However the battery resistance is actually fairly low.
It takes fairly sophisticated equipment to measure actual battery resistance. Basically pure water is not a good conductor (dead battery) where a charged battery with lots of sulfite ions in solution is a much better conductor. Similar to adding salt to water will reduce the resistance.
Snowman9000 wrote:Yes. Although I believe you would need some kind of superconductor to truly be zero resistance. Short fat conductor will be a large improvement.
If there was no wiring resistance, would the charger and battery terminals read the same voltage, whatever it may be?
