can lipo's burst
 

just sold a pack and i got a repot of it being burst!

been doing rc over 20 years and i think i would have spotted that.oh the joys of selling on ebay.

if they were plastic cased may thats split??

They can burst if over charged or over discharged

One went up at the recent TC worlds leading the BRCA Elec TC commitee to make a few changes to the rules for the BRCA nationals.

We all have to use charging sacks now.

If charged and discharged incorrectly they will bulge and eventually pop. I've had a (cheap) battery go when charging at over 1C.

Yes, they can...
 

DCM, in Sweden we have even had reports of LiPos that burt during storage.
According to one owner it was an EFRA approved hard case that was 80 % charged. Others had stored them fully charged.

As for LiPos that give in under use:
http://i319.photobucket.com/albums/m...wulf5/lipo.jpg
http://i319.photobucket.com/albums/m...5/IMG_0049.jpg
Photos are from Groovy Drift

hrmm 1 of mine is starting to bulge a little in a hardcase...

a friends HK cheapo's without hardcase have grown quite a lot and don't hold charge now

They can burst after a big jump and you stand there watching your whole car disappear in a cloud of smoke...

Those pictures scare me :cry: I've only just got some new lipos, are they safe?

Yes, so long as you follow the regulations on charging/discharging carefully.

I personally don't think the technology is ready yet for such high drain applications.

My Lipos are kept in a charging sack in the garage!

Certain sections have decided to use sacks. It's not a brca rule till the agm. If it gets passed every club/racer etc will have to use a bag for charging any Lipo as it will be in general rules.

As for ur Lipo on more than 1s than use ur head and follow the brca guide lines. it users like you who pit others at risk.

We all make mistakes which we learn from and can pass on that knowledge to others. In that instance I just forgot to change the charge amps from one battery to another. A little error like that is all that is required to make one of these things go.

I think your reply was a little harsh.:thumbdown:

Oh and just to add, a number of leading manufacturers quote that their batteries can be charged at more than 1C. See the first line on the 'Features' for this particular item....

http://www.lrp.cc/en/products/vtec-b...c-74v/details/

Could someone point me at the BRCA guidelines?

Here's the latest guideline published on the EB part of the BRCA site:
http://brca.org/BRCA/elecboard/news/...%20pdf%201.pdf

The rumour is that the incident at the 12th worlds was caused by a charger being on the wrong setting.

LiPos are safe unless charged incorrectly or overdischarged.

But if they are mistreated then they do not always just burst into flames immediately. I have had a couple of packs that got overdischarged (faulty lipo cutoff) and they were fine that day and the next, but two days after it had happened I checked them and they had swollen up massively.

In the end, even when one of the cells go up in the pit, they are still safer than an exploding NiMH cell.....

Tell me about it. I remember one going off at our local track. It's like a shotgun pellet.

I do think that the LiPo cell is inherently safe, as long as it is used within it's safe parameters, where as a NiMH would just go...

well yes they can, but I think you would have noticed:woot:, so if your an honest chap I think there is a chance this ebayer has shoved them on a charger, not done things as he should and is now tryiing to get his money back.

Lipos can swell a bit, you soon notice it with soft case flight packs I had a 6 cell swell a little in a T-rex 500.scared the poo out of me:lol:. But if he is saying they have burst and he wants his money back Hmmmm

I'd be asking for an image of this 'burst' pack!

Get him to return it, then after inspection decide on a refund.

i am fully aware of what manufactures say, indeed some say you can charge at 5c BUT the BRCA which govern our hobby ask us to exceed no more than 1c