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Unread 08-09-2013, 16:09
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DampRobot DampRobot is offline
Physics Major
AKA: Roger Romani
FRC #0100 (The Wildhats) and FRC#971 (Spartan Robotics)
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Re: Battery Leads and Resistance

Thanks for all the answers! To those that asked about our resistance measuring method, we were just using a standard cheapo multimeter. We measured both wires from their crimped ends. The measurement struck me as too high at the time because at a 150 amp draw, you would see a 9 volt drop in the battery voltage.

So, we might attribute 1 volt of the drop when were at max acceleration to the length of the wires? Ie, it would be dropping our voltage by about 10%? This seems like a significant number, especially because power is proportional to the square of voltage.

EDIT: We noticed very significant heat in the wires when we changed the batteries during some long practice sessions. So, essentially you're saying that we'd be depriving our drivetrain of hundreds of watts at full throttle, and just turning it into heat?
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Last edited by DampRobot : 08-09-2013 at 16:12.