|Aug 03, 2004, 01:43 PM|
cool down before charge?
From the thread "GP3300 Charging Problem":
I use 7- and 8-cell KAN 1050 (flat)packs with my SS doing aerial photography; frequently I will put the just-flown battery on a 1C charge so it will be ready for another flight that day. The pack heats up to 50-60^C (130^F) in flight.
I guess that I should also be letting the 1050 KANs cool before charging. A cooling tube could be easily made from a 12V muffin fan and PVC tube.
I have one 7-cell pack left (the other got damaged and is not used in flight) with p'haps 20-25 flights on it, with under half charged "hot". I plan on adding an extra cell and turning it into an 8-cell pack. I have two new 8-cell 1050 KAN packs to add to my collection, giving a total of three packs for use. I wonder if I've shortened the life of the 7-cell pack by charging it hot?
|Aug 03, 2004, 03:01 PM|
If you're only recharging at 1C, the pack will cool by itself long before any heat is generated from the charge process, so you're probably OK.
I force cool my packs for a few minutes (in a cooling tube), then charge them on Auto - KAN's charge as high as 5A during the early part of the charge cycle, but drop to 2-3A as they approach peak.
|Aug 03, 2004, 04:04 PM|
The discharged packs take about 30-40 minutes to charge, so they do have time to cool before the heat of charging starts to peak out. I really hadn't thought about a cooling tube since I associate it with a "high power" pack and the 1050's are "wimpy" in comparison.
It wouldn't be a bad idea to put together a cooling tube.
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