Quote:
Originally Posted by Al Skierkiewicz
Ryan,
You misplaced a decimal...
Typical battery is 0.011 ohms internal so 262 amps will drop 2.88 volts on a fresh charge. Adding up other typical losses, a team might actually see a 3.5-4 volt drop at the input to the PDP under stall conditions.
Your other recommendations are perfectly stated.
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Ha... going off of memory here. It was either 0.08 or 0.008.
I should have looked it up, the
MK ES17-12 has a typical internal resistance of 0.012 Ohms (12 mOhm). Other batteries are likely similar (as you stated 11 mOhm).
So yes, if it is 0.008, the voltage drop of 20.96V goes to 2.096V. That would be fine for the battery, but I'm betting the resistance of the main breaker gets higher as the internal element heats up, as does every other part of the robot's backbone electrical distribution system. Resistance adds up in series.