06-04-2011, 10:15 PM | #1 |
Rock Crawler Join Date: Sep 2008 Location: Delta B.C.
Posts: 554
| lipo overcharged
so my buddy threw a 3s 5000 on the charger..i guess he had it set to something other than lipo..he,s lucky it didnt catch fire, anyway the voltages are 4.44, 4.54, and 4.48 i said i would try to discharge it on my charger but the charger tells me the voltage is too high for a 3s my question is can i set the charger to 4s for the discharge..in the discharge i dont know how relavent the voltage is?.maybee i can set the cutoff to 2.7 or around there and try to fool the charger(not a balance charger)..i have a bliky balancer on it now but takes way too long |
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06-04-2011, 10:59 PM | #2 |
cherry bomb Join Date: Jul 2006 Location: Nanaimo, BC, Canada
Posts: 1,598
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why not plug it into the car and drive it? that'll bring the voltage down. |
06-04-2011, 11:01 PM | #3 |
Rock Crawler Join Date: Jun 2007 Location: Arlington
Posts: 684
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If it didn't puff, just run it in something to get the voltage down. He's very lucky it didn't catch on fire, but since it didn't... and I'm assuming it didn't puff since you're trying to save it, run some voltage off. Do it carefully, and make sure the battery doesn't get hot or puff at all. The tricky part will be getting it to charge again. I would charge it the next few times in a concrete pit with nothing around that's flammable. |
06-05-2011, 12:25 AM | #4 | |
Rock Crawler Join Date: Sep 2008 Location: Delta B.C.
Posts: 554
| Quote:
thanx Last edited by vonclod; 06-05-2011 at 12:46 AM. | |
06-05-2011, 12:25 AM | #5 |
Newbie Join Date: Jul 2004 Location: Detroit
Posts: 38
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Like others have said run the pack a bit to bring the voltage down then take it easy on it. Maybe run a discharge/charge cycle on it and keep an eye on it. I've had packs that were under voltage and wouldn't charge as a lipo unless I put them on the charger as a MH pack for 5-10 minutes. They've worked fine since. Over voltage is probably much more dangerous. |
06-05-2011, 12:41 AM | #6 | |
Rock Crawler Join Date: Sep 2008 Location: Delta B.C.
Posts: 554
| Quote:
ya i gave him hell..lol he is very lucky, he had the charger on pb i,ve been running lipo for 5 years and never had this problem, i,ve recovered some from overdischarge..his vxl wouldnt run it had 2 light lit up and i,m assuming it wont run over the 3s or i would of tried to run it down..i think i,ll be leaving it outside with a blinky on it thanx | |
06-05-2011, 12:44 AM | #7 |
Pebble Pounder Join Date: May 2011 Location: Spring
Posts: 117
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if you do cycle the battery I would charge it in one of those lipo safe pouches just in case something happens. Im suprized the battery didn't swell up and cause a fire. But I agree to run the pack on a vehicle to bring it down, but I wouldn't hammer on the throttle til you get it in its safe zone.
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06-05-2011, 12:56 AM | #8 |
Rock Crawler Join Date: Sep 2008 Location: Delta B.C.
Posts: 554
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ya i think even if i did get the voltage down this pack is not going into his slash 4x4..too much load on a damaged pack and it has puffed about 1/4"+ but it symetrical..kinda had me fooled till i compared to one of my packs
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06-05-2011, 01:17 AM | #9 |
Rock Crawler Join Date: Jun 2007 Location: Arlington
Posts: 684
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The middle cell can swell and the pack will look the same. Lipo is one of the best advancements to the hobby to date, but also one that can burn your house down. When you see him next, kick him square in the balls for being a dumbass. Nothing teaches people better than burning a house down, or being kicked in the balls. On another note, I just got done burning my house down. Send me free shit. |
06-05-2011, 07:22 AM | #10 |
I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
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06-05-2011, 09:27 AM | #11 | |
Rock Crawler Join Date: Jun 2007 Location: Arlington
Posts: 684
| Quote:
I'm joking, but he wasn't... lol | |
06-05-2011, 09:35 AM | #12 |
Suck it up! Join Date: Mar 2008 Location: Arkansas
Posts: 11,652
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Poke it with a stick.
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06-05-2011, 11:24 AM | #13 | |
I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
| Quote: | |
06-05-2011, 04:52 PM | #14 |
Rock Crawler Join Date: Sep 2008 Location: Delta B.C.
Posts: 554
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well the blinky balaced the pack overnight amazingly enough so i think i,ll try cycling them under a 10 amp load and .5c charge and see what happens..me thinks i,ll do this outside |
06-05-2011, 06:05 PM | #15 |
I wanna be Dave Join Date: May 2007 Location: Vancouver, BC
Posts: 2,376
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It's starting to sound like you might be winning with this one Darren!
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06-05-2011, 10:58 PM | #16 |
Rock Crawler Join Date: Sep 2008 Location: Delta B.C.
Posts: 554
| hey Al, ya i havent had a chance to cycle it yet so i will get to it tommorow and post the results..these were a good batch of cells and stayed very balanced..never more than .03v difference at cutoff so we,ll see after a cycle or 2 if they stay balanced..might win |
06-07-2011, 07:53 PM | #17 |
Rock Crawler Join Date: Sep 2008 Location: Delta B.C.
Posts: 554
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nope not winning..lol 2 cells are damaged..60$ lesson for my buddy it discharged ok at 10 amps but 2 cells out of balance quite a bit and same on the charge..he doesnt have a balance charger so its not goona be a safe pack
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