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BrianG · 07:37 PM

Did a little more running this afternoon using the new battery. Ran until the Quark cutoff (3.0/cell), which worried me a little. Usually, when the LVC kicks in, I can stop for a sec or two, and then run it back to me (I'm lazy). Not this time. I thought I popped my ESC. Turns out everything was fine, just the battery was done. Didn't notice much loss of power before the LVC point.

And since the LVC was at 3.0v/cell, the Turnigy pack was a bit warmer than I would like (didn't get a measurement, but I would estimate ~115*F-120*F), but not nearly as hot as the MA pack I was using.

Took an Eagletree graph and got repeated spikes near 150A. Average current draw was ~12A. Max burst was 168A. Some burst sample points (and all were taken at least 1/3 into the run):

3.4v/cell @ 168A (33.6C)
3.67v/cell @ 150A (30C)
3.78v/cell @ 100A (20C)

Not too shabby. Cell resistance calculates to somewhere between 0.001 and 0.003 ohms per cell (higher as current increased, and the further into the run I went).

	(#1)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	09.16.2009, 07:35 PM Did a little more running this afternoon using the new battery. Ran until the Quark cutoff (3.0/cell), which worried me a little. Usually, when the LVC kicks in, I can stop for a sec or two, and then run it back to me (I'm lazy). Not this time. I thought I popped my ESC. Turns out everything was fine, just the battery was done. Didn't notice much loss of power before the LVC point. And since the LVC was at 3.0v/cell, the Turnigy pack was a bit warmer than I would like (didn't get a measurement, but I would estimate ~115F-120F), but not nearly as hot as the MA pack I was using. Took an Eagletree graph and got repeated spikes near 150A. Average current draw was ~12A. Max burst was 168A. Some burst sample points (and all were taken at least 1/3 into the run): 3.4v/cell @ 168A (33.6C) 3.67v/cell @ 150A (30C) 3.78v/cell @ 100A (20C) Not too shabby. Cell resistance calculates to somewhere between 0.001 and 0.003 ohms per cell (higher as current increased, and the further into the run I went). Last edited by BrianG; 09.16.2009 at 07:37 PM.