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#41
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but isn't it just simply the fact that most of the cells that have blow up, haven't been equalised first, the last 3 sets i seen go bang, i asked the people involved and all said equalise is that really necessary,?? well yeah. i never had one go bang yet, discharge then equalise before you charge, problem solved
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Mattys the driver,my names carl
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#42
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Quote:
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#43
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as i said equalise and u should be OK, thanks Neil great piece of info
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Mattys the driver,my names carl
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#44
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Quote:
I follow Neil's advice. I have never had a cell go, or lose power, or anything else, since I started using IBs two years ago. I think Neil's right, but my note was simply pointing out that things stated on here as being gospel are not, and that advice one receives conflicts. |
#45
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And they were GP3700's not IB's |
#46
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Well that says its not only IB's that go bang.
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Canon 40D (350D backup) - EF-S 18-55 - EF-S 17-85 - EF 100-300 - EF 50 - Canon 430 EX || Speedlite - Canon BG-E2N Grip Adobe Photoshop CS4 Extended AX-10 Crawler - Thats all I have left!!!
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#47
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having seen a lipo go up, and an ib the lipo is way less violent and danjerous than a nimh
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MBModels - Schumacher Racing - Vapextech.co.uk - MRT - Savox - SMD |
#48
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Isn't it so that we have been blowing up cells since about the time RC started?
NEVER have any federation stopped it though, before now, when some jerks in the Norwegian federation did it. No investigation into what actually happened when cells blew up last weekend in Norway. And of course no reaction what so ever before these incidents happened "at home"... Reading the explanations in this thread regarding these newer cells I think it is obvious that these so called explosions must have come from some kind of abuse. I mean, have anyone ever soldered tabs to cells without ever overheating a cell... When reading the panic actions and statements that the Nor. federation has published, I think that their next move can not be anything else than to force their clubs to have people overseeing/managing all cell charging that will have to take place in a designated area well separated from pit/racing area. Probably on the clubs owns chargers that have to be exactly the same chargers with a maximum possible charge rate of 1C... Next step after that will then be that the fed. people can stop working and go home, since there will be no more racers and no more clubs... |
#49
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Ive had a set of Epic3800's go, had a bit of warning so chucked them into long grass.
What I tend to do now, is leave my cells with whatever is left from a race in then either in the morning of the night I am racing or the evening before the day I am racing I will discharge, allow to cool, equalise, cool and partial charge my IB4200's to 3000mah at home - then when I go to the track I peak the cells for racing with. Is this a bad way of doing it? My IB4200's seem to have deteriorated in performance faster than any other cells I have ever had. |
#50
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They don't like being re-peaked Chris, as they don't actually 'peak' very well the second time, causing overcharge as Neil said.
I tend to not re-peak, but if I do (because the cells have been charged too soon before I race) I just put 200 seconds into them and cut off the charge myself. Discharge, equalise and charge on the day would be my suggestion Chris. G
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Graham North http://www.atomic-carbon.co.uk https://www.facebook.com/atomiccarbon https://www.facebook.com/nortechracing |
#51
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Well I don't peak them on the 1st charge, just do a partial - come off cool and keep it to 5amp at home, this is what I am confused with, as its only the 2nd charge I let the peak detection cut in.
I find it more convenient this way, but if it is wrong - yeh I'll discharge, equalise and charge at the track - although the 1st pack i charge will get charged from storeage so I don't get a little behind..... I'd then rotate which pack I charge first, so I have no 1 pack which is abused, all of them will be in turn. Chris |
#52
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the ideal method from what i've been told by those that know is
discharge, equalise and immediatly charge never re peak once charged if being stored between meetings leave 1/4 to 1/2 charge in if not being used cycle cells 1/mth also discharge and put in 1/4 to 1/2 charge weekly also storage conditions have a big effect if kept in a cold place the cells will hold more of the storage charge than if kept somewhere hot |
#53
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Me also,Lipo cells seem to burst into flames but nimh packs EXPLODE. |
#54
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Yeh, cause flames aren't dangerous are they?
G
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Graham North http://www.atomic-carbon.co.uk https://www.facebook.com/atomiccarbon https://www.facebook.com/nortechracing |
#55
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wont do as much damage as exploding bits of metal tho!
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MBModels - Schumacher Racing - Vapextech.co.uk - MRT - Savox - SMD |
#56
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Even if some kid has them on charge in the garage, or on his bedroom floor?
G
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Graham North http://www.atomic-carbon.co.uk https://www.facebook.com/atomiccarbon https://www.facebook.com/nortechracing |
#57
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I agree Mark, but both choices aren't particularly nice.
The question is, do we have an issue with safety? Will the BRCA intervenene ? To be honest, right now, I am just taking good notice of all good advice to do what I can to avoid a potential explosion. |
#58
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Is Lipo charging covered on house insurance?
G
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Graham North http://www.atomic-carbon.co.uk https://www.facebook.com/atomiccarbon https://www.facebook.com/nortechracing |
#59
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Well, general "Battery charging" would be considered safer than various other things done in the house I hope.... who'd give them the nitty gritty on "I was charging Lipo at 20amps and set the cutoff wrong", not me.
Chris |
#60
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I was just point out why I though an 'on fire' lipo would be worse than an exploding nimh, but I agree, both are bad.
G
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Graham North http://www.atomic-carbon.co.uk https://www.facebook.com/atomiccarbon https://www.facebook.com/nortechracing |
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