gwright
Posts: 388
Joined: 1/11/2002
From: Melbourne, FL, USA
Status: offline
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I end-to-end solder all my packs. Now that I'm accustomed to doing that for e-flight power packs, I also make my own packs that way for reciever/servo packs on non electric aircraft. The reduction in resistance compared to those little "solder tabs" is rather substantial. I've probably got $2K invested in packs for motor power (from 6 cell packs to 30-cell packs), all of which are end-to-end soldered, most of which have several HUNDRED cycles on them, with no degredation in performance or capacity. I would not be intentionally doing something to shorten their life I assure you. I use a 60-watt iron with a hammerhead tip (large mass, doesn't cool quickly when touching something) and I'm on the end of a cell usually less than a second, but sometimes more. I've only twice had a cell vent, and both those times were during charge with malfunctioning chargers, not due to heat from the soldering process. If you do a bit of research into high-performance electrics, you'll find soldering directly to a cell is the ONLY way to go. The little solder tabs are probably Ok for a few amps, but still,..the internal resistance is far higher than either end-to-end soldering or connection with a large braided strip.
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Gary Wright
www.gwmp.net
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Powerhouse batteries - 
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Powerhouse batteries - 