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e-Electric Batteries & Chargers > Charging? - Sorry I'm new to e-helis.
 
 
Ozzy Pilot
Senior Heliman
Location: Victoria, Australia

Hi Folks,

I'm new to e-helis and have just got my Logo 20, Schulze ISL6-330d charger with instructions and 24 cells NiCad Sanyo 2400, 24 cells NiMH Venom 3000 and 24 cells NiMH GP 3300 battery packs.

I have browsed the instructions for the charger and I think I have a basic understanding of how to charge the packs the only thing I am unsure of is what rates should I charge at and what programe should I use on the charger. Can anyone give me some guidelines specific to this charger?

I think the packs have been unused for several weeks so should I treat them in a special way for the first charge?

Does anyone know if I can find a documented system of looking after my packs on the web that is explained in plain language as at this time I don't have a good grasp on the terms etc. used. I do understand the basics such as mAh, Amps, mA, 1/10C in regards to pack capacity and the different types of batteries.

Any other advice would be appreciated. I have done a search here for charging and have got some good info from that but would appreciate info specific to my gear and packs.

Sorry for the newbie questions but I suppose we all have to start somewhere and I have found RunRyder to be the best start

I appreciate your help.

Thanks

Member of Good Guy list (seller) Pg. 23. Turbines - Audile pleasuring
01-09-2003 Over year old.
HOMEPAGE  
 
 
donlynn
Key Veteran
Location: New Zealand

Gidday Ozzy
Don't know much about your heli's or e heli's in general but I have flying buddies here (3) who meet on a wed night in a hall and all have converted to lithium polymer batteries, I think they bought them from helihobby.com
They look like and feel like a slice of cheese but just a wee bit heavier with foil on both sides. one slice ~2000mah !!!
They have gone from 5 min flights (nicads) to 20 min plus(lithium poly's) -picolo. Two run pics(one a cp hornet head the other fp std) the other guy runs a hornet(fp hornet) and he's gone from 4 min flights(nimh) to 20 min + (lithiums poly's) all these times are OGE and ff.
the price is very similar to std nicads and the chargers were self made by one of the guys based on a three terminal regulator ,LM317 I think
only drawback is slow charge rates ~1hour I think so 3-4 packs reqd.
My point is give serious thought to these cells as they are very very impressive.
On the pic they can recover some head speed in the first couple of minutes of the last 5 minutes if they hover in ground effect for a wee bit.

Regards Don
01-09-2003 Over year old.
 
 
Eco8gator
Key Veteran
Location: Palm Beach Gardens, FL

Hello

The "C" rate is refering to the capacity. Technically, your NiMH cells should be charged at 1C and that means that you multiply the capacity by 1 and that is the current limit you should set for your charger. So select 3-3.5 amps(4 will also work) and let the charger work from there. What ever you do, DONT use the "auto c"--automatic charge-- on your NiMH's it is only made for Nicads and works for a very few NiMH(new Sanyo 2600's and Panasonic 3000 Heavy Metals).

I take it you are trying to decipher the Schulze manual. I have many Schulze porducts so I am used to the manual but I know how you feel. Dont worry about the manual the charger is extreamly easy to use. Just navagate the menu with the 2 buttons. There are only a few thing you would probably use in the charger anyways such as auto 3DC(auto cyclie for Nicads or select NiMHs), auto C, and the manual current choices.

For your NiMH packs I would charge them at 3-3.5 amps and then discharge at an amp at least 3 times. NiMH's take a few cycles to get max power.

Carlo
01-09-2003 Over year old.
 
 
Ozzy Pilot
Senior Heliman
Location: Victoria, Australia

Thanks for your help guys!

Don I'm surprised you didn't mention the Cricket results last night!!
I think the Shri Lankens have been playing games

Thanks again

Member of Good Guy list (seller) Pg. 23. Turbines - Audile pleasuring
01-10-2003 Over year old.
HOMEPAGE  
 
 
steph280
Key Veteran
Location: Irvine, California

I use the automatic feature on my Schulze 636 to charge my HRSC2600, and it always goes immediately to 8.1 amps. These Nimh cells produce more power when charged at higher amps.

But this doesn't apply to other Nimh cells, such as the 3000-3300mah.

Stephen
01-10-2003 Over year old.
 
 
E-gpeden
Senior Heliman
Location: Lake Louise, Alberta, Canada

Hi Ozzy,

"Does anyone know if I can find a documented system of looking after my packs on the web that is explained in plain language as at this time I don't have a good grasp on the terms etc. used. I do understand the basics such as....."

The EZone has a FAQ that might help:

http://www.ezonemag.com/

1/10C is 1/10th of the mah (milliamp-hour) capacity of the pack expressed in amps, and is considered to be the nominal charge rate that a pack can safely dissipate the heat from over-charging. For example a 2400mah (2.4 amp-hour) pack would be charged at .25 amps (1/10C) to equalize it after it is built or if it's performance starts to fall off. The purpose of this is to allow the lesser charged cells catch up with the rest of the cells in the pack. The problem is that this is hard to do with larger packs on most chargers because peak detection acutally interferes with this process. This is one reason that I keep my Astro 112D charger around. It can be started up in "test mode" and will charge indefinitely at a constant, adjustable rate.

You should charge the 2400mah nicad packs as fast as you can (up to 10 amps), hopefully at least 6 amps.

Cheers!
Glen
01-10-2003 Over year old.
HOMEPAGE  
 
 
Ozzy Pilot
Senior Heliman
Location: Victoria, Australia

1C or flat out

Hi Glen,

Thanks for your reply again.

Your charging rates of at least 6 amp or higher for the Nicad does this also apply to the NiMH?

Your rates differ a lot from those given to me by Eco8gator so what are the advantages or dis-advantages for either rates.

Thanks

Member of Good Guy list (seller) Pg. 23. Turbines - Audile pleasuring
01-10-2003 Over year old.
HOMEPAGE  
 
 
E-gpeden
Senior Heliman
Location: Lake Louise, Alberta, Canada

Hello again,

As Steph280 pointed out, only the newer NiMH can tolerate this charge rate. I've kept to Nicads myself, but the stats and reports about the new 2600's might make me try some of those. Until these new cells came out, if you used NiMH, you had to suffer with slightly lower voltage, less performance under load, higher costs, less tolerance of abuse, and longer charge times. I don't know much about the NiMH you have and what charge rates they can tolerate.

Cheers!
Glen
01-10-2003 Over year old.
HOMEPAGE  
 
 
meltr
Senior Heliman
Location: London, UK

Unfortunaly I only have a supernova. It only seems to be
able to charge the 24 cell pack (2400mAh sanyo) at 3.4A.

Is it better to charge the packs as one at 3.4 A, or charge
them seperatly at 5A ?

One strange thing I noticed also is that the supernova in
automode chose 0.1A to charge the packs ;( Could this be
because the packs are new ? I have done one slow charge
at 0.3A and flew the pack out once.

I noticed the head speed dropped quite a bit at even
moderate pitch, how many cycles will it take for the battery to
gain it's full power? I didn't notice such a marked change
in power when I had my ECO 8.

Mel.
01-11-2003 Over year old.
 
 
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