SMC 28C 4000/5000 Hardcase Lipo part 2
#901
autoset: I personally have not experienced what your mentioning and I haven't heard about this. I'm sure there is a reason for this but you will need to figure it out. The first thing I would do is to change the Deans connector on the pack as we have seen some connectors that fit loose which would increase the IR. It's also a good idea to bend up the springy part of the male connector once in awhile as a tight fit will keep the IR as low as possible. I would then try a different motor. If that doesn't do anything I would borrow/change speed control.
#902
Tech Master
iTrader: (16)
Danny - If my batteries, SMC 4000mah LiPo's, get too hot from being inside a car for a few hours (125F), is it normal for the entire pack to swell about 1-2mm in thickness? I fear my being lazy after a long day of racing may have ruined my batteries.
On a side note, I did notice that even prior to today's HEAT Extravaganza, that my two SMC 4000 LiPo's were already starting to swell slightly as the cases were no longer tight fitting on the battery.
What do you think?
On a side note, I did notice that even prior to today's HEAT Extravaganza, that my two SMC 4000 LiPo's were already starting to swell slightly as the cases were no longer tight fitting on the battery.
What do you think?
#903
Swelling can happen due to the packs being overdischarged , overcharged , stored with to much charge. Storing them in a hot enviroment with no storage charge could overdischarge them. There might be other things that cause Lipos to swell. One of our oval drivers has a pack that swells slightly when charging it's still running strong on the track. So I would think your packs will be fine but if you do have issues with them just email me or PM me.
How are you charging the packs ?
How are you charging the packs ?
#905
Tech Master
iTrader: (16)
Swelling can happen due to the packs being overdischarged , overcharged , stored with to much charge. Storing them in a hot enviroment with no storage charge could overdischarge them. There might be other things that cause Lipos to swell. One of our oval drivers has a pack that swells slightly when charging it's still running strong on the track. So I would think your packs will be fine but if you do have issues with them just email me or PM me.
How are you charging the packs ?
How are you charging the packs ?
Last edited by kn7671; 07-27-2008 at 04:49 PM.
#906
How do I go about estimating these values? I have a Hyperion Charger. I hope this is not a dumb question...but im not sure what to do. Do I discharge then charge back up?
#907
Tech Lord
iTrader: (32)
The latest firmware for many Hyperion chargers has a "storage" mode that will charge/discharge the battery to 60% for you. I believe that's the the airplane guys have settled on. Danny seems to think it's quite a bit lower. I haven't done any tests, personally. What charger do you have? Perhaps you can update its firmware.
#908
Not sure what could be the cause of the swelling but the fact that you have 2 packs that are doing this tells me something might be causing this in your treatment/routine. It's normal for the odd Lipo pack to swell as this is just the nature of Lipos but to have 2 packs do this makes me wonder.
Continue using the packs and if they don't feel right on the track or swell allot email or PM and we will work something out.
#911
#913