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Discussion Starter #1
So I finally had time to analyze my suspect pack, and there was one
completely dead cell (0 volts after charging all the rest of the pack (79
cells) to 3.8 volts. I replaced the 10 pack and have first balanced the 80
pack and am now trickle charging / balancing the system.
I suspect that this was bringing down the whole system. I measured the
resistance of the cell at .4 ohms for what it is worth (the charged cells
read 0 ohms). I don't know for sure what that means net net. Clearly I'm
much better off than before, but for drag racing purposes was that bringing
me down over not being plugged in. I see that there are 3 possibilities
1. The bad cell limited to output of the pack it was in , but still
contributed to the performance of the car. Net +1-8%
2. The bad cell negated the pack it was in but didn't have any net effect
on the system. Net +8%
3. The bad cell was causing a cross charging, system draining effect. Net
+8-16%

I'm glad that I have one balancer per cell so that I was able to quickly
find it. (One on my parallel strings came started balancing earlier than
the rest, all but one cell, and wouldn't come up in trickle charging).

KD
http://ssi-racing.com

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