5C charge capable NueEnergy Lipos??
 

Sorry if this is a repost

Hey guys I just happened by the Neu website and on their main page they are adverstising a new line of lipo packs that are capable of being charged at 5C. Sounds too good to be true, what do you think?

I want to see a 6s capable charger that can push 30amps during a charge.

Yah that was my thoughts exactly, we'd need to be carrying around automotive car chargers or something.

But if they work then that would be fantastic for my smaller capacity 2s and 3s packs for carpet racing. Also if its proven that they will handle the power im sure the charger manufactures would jump on it.

Heck... it would be nice just to feel comfortable charging them a 2 or 3c rates and knock the charge time down to 20-30 minutes with no worries.

But I just loaded up on the sale they had for their old packs so I dont think I'll be buying more any time soon.

Yah same here, your old Cen Truggy is now sporting a nice 5s 5500 pack :yipi:

Like you said though, even 2c or 3c would be great!

lol, charging a 6s 5Ah pack at 3C would require a charger with a 378w power limit, and a 12v supply capable of around 50A (figuring in charger efficiency and 25% safety margin).

Dual Hyperion 0610's running at the same time could hit those power levels, but their current is limited to 2c (10A). I don't think there is a charger on the planet that can do those levels of charge! You'd have to get a CC/CV power supply, but there are no safeguards like there are on chargers...

I can get one, but it'll cost a little.

5c Charge is insane. No way the battery can take a charge at that rate and not suffer in some other way, like shorter useful life. Besides, it's just silly, hopefully this "advancement" didn't come at the expense of truly useful enhancement such as size and capacity.

its done all the time with a123 cells. Why couldnt a new lipo chemistry achieve the same thing?

According to the Neu website the new 5c packs are the same size as their current 30C/60C EP packs, so size isnt the issue and they are offering a 5s 4100 pack instock right now and more capacities to follow so that doesnt seem to be an issue either. Im wondering about the useful life though.

That's crazy. I don't think there is a charger out there that could do that though

Should I mention that people have been charging A123 safely at 4C+ for some time now? Are the Neu packs LiPo, or those flat A123 cells??????

Good thought. Enerland did buy a123 so that seems like a definite possibility.

There are a few chargers that can. I'm thinking of getting one if I can get the manufacturer to lower the price.

It's the other way around. A123 bought Enerland.

So who's going to be the guinea pig and buy a couple of those suckers and test them out. I would but as I mentioned above I am pretty much set for lipo packs for the time being. Anyone?

The end of long charge cycles w/ lipo's.. 5c ?WOAH!
 

I just happened to swing by Neu's web site and noticed why they unloaded the previous generation of lipo's for such a great price.. The new generation of lipo's are rated for 5c charging! That is sick! Figures I just ordered two zippy 5k packs the other day... I'm not even sure if they are going to hold up to my system at this point. My 8t conversion w/ a 2.5d is making my evo25's burn up (140) after a full run.. I can only hope these zippy packs can take my punishment. I actually was going to just pay the extra and get the Elite 35c packs, but I couldn't find any in stock. ARGGHH

5k packs at 5c wow (25a)... you won't need as many packs anymore, no memory and quick charging like that.

What charger can do that? At 5c I won't be charging in my house.

Wow, 5C charge rates. I don't think I have seen a charger that can charge at 25amps though. Probably cost an arm and a leg to get such a charger.

I have the following questions:

1. Do you still have to let them cool before charging after they were discharged? This would be nice if you could charge them after a race.
2. What charger would support this? My charger supports up to 10 amps. I would assume new chargers will support this.
3. Is that the only benefit, that you can charge them faster?

Hyperion 0610i duo sports 36a max, 18a per side basically but with out some kind of firmware update I think it is limited to a 2c charge rate. Lipo's should be cooled if your system is pulling too hard and they get really hot yes, I would say anything under 100 is fine to drop on the charger immediatly, but ask around.

Personally I would be plenty happy if I could safely charge at 2C and my 0610i duo could handle a 2C charge rate if the packs would take it safely.

Bruce, bad math... 25 amps at ~18volts is not the same as 15 amps at 120 volts.

Threads merged.

Well many can do 2c already so it's not a stretch, but I would have thought we would have seen a 3c 4c etc etc.. I can handle 2c or 3c w/o any ill effect on the cells.. I would actually just like the cells more dense :) shave some weight off on the bigger packs ya know..

25A 1:1 car battery charger couldnt give power to rc car charger to charge 6s @ 6.5A. Maybe full 1:1 car battery + its charger could give enough power.

i will say that the trackpower and flightpower packs take 1.5c no prob. I could even go 2c but i stay at 1.5c to be safe. This is done will close supervision in case i do ever have a mishap but been like this for 4 months now and no problems at all.

A couple of years back a company called FMA had the Scorpion 2S lipos and charger. I have a few of the packs and 2 chargers and I like charging my 3200mAh and 6400mAh packs at 10A. Enerland is ahead of Kokam and 5C is possible. If I had the charger to do it, I would definitely do it. Just to see how many cycles I would get out of it before I see significant loss in capacity. If they can take 100-200 cycles 80% DOD with 2C charge and if these new cells are better, we might expect the same. Even if it's less cycles, it'll still be a lot more fun having them then NiXX.

I throw my packs right on the charger after my races and qualifiers and haven't noticed any negative effects. They don't heat up at all, the temps begin to drop right away.

Whooooo!

Im going to buy some of these for my E revo! Heck, 2C or something if fine for me. What ever the 989 will put out is what they will be charged at LOL

The other issue is balancing. The charger would have to back off to let the balancer catch up to avoid overcharging cells. No problem for chargers with integrated balancers though.

Individual cell charging would almost be mandatory. But the balancer harness wires would have to be capable of handling the 5c charge rate...

Wonder if you could parrallel two EOS 720i (both main leads and balancer) to charge @ 20A.. Wish I had kept all of my chargers, I would of definately tried this..

The man is back. Where have you been?

Hey guy.. Thanks for the greeting.. Been busy filling up the house, and becoming closer and closer to being broke.. but that's all finish, and it's RC time again.. I just need to do a lot more reading, I feel lost in the RC world right now... but back on track... Anybody ever tried parralleling two chargers together to get double the charge rate.. :intello:

I've seen people using those regulated power supplies, but with A123 cells. I know they are CC/CV or CV/CC and you can set the required voltage and AMP you want to charge your packs at.

I know you can link up 2 of the 610I chargers to do up to 12s. I am sure you can do the same for the 720I. Not sure if you can link them to charge a 6s pack at 500+ watts though...

http://www.rc-monster.com/proddetail...EOS720I&cat=19

So I'm assuming you can charge a 6s at 500w...

Good stuff, so that should answer aqwut's question. Good job Cory, next time I see you I will give you a cookie!

Thanks man, I'd like to thank my mom for feeding me, my girlfriend for sleeping with me, me dad for beating me, schools for nothing, internet for porn, traxxas for evolution. Thank you!