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GrandRC . CanoMod . Futaba-RC

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e-Electric Batteries & Chargers > Triton NiMH question
 
 
jasonmolinari
Senior Heliman
Location: Atlanta, GA

I just discharged and then charged my Rx NiMH pack. Its a 1400Mah pack.
In discharge in "removed" something like 1350 Mah, but in charging (i charged at 1.4A) it only put 750 back in!

Whats teh deal? is my battery shot or what?

thanks
jason
08-23-2003 Over year old.
 
 
jasonmolinari
Senior Heliman
Location: Atlanta, GA

Can i charge the NiMH at C rate? Or should i go lower?
What sensitivity should i be using for NiMH i had it set to 5mV..
thanks
jason
08-23-2003 Over year old.
 
 
pilotError
Key Veteran
Location: Long Island, NY

Triton Charger

Use the Nicd program for charging your Nimh batteries. If you aren't in a hurry, charge at C/10, or 1C top's with Nimh. The Nimh program peaks a little early and has problems fully charging. I haven't had it cut out that low before, but I have had it put 980 Mah into an 1100 Mah battery. In Nicd mode it charges correctly to about 1170.

Whatever you do, don't use Auto mode. I tried the auto mode and it decided to use 5A on an 1100 Mah battery. I caught it in time, but I'm not overly impressed with this charger so far.

Mike...

Good Judgement comes from Experience. Great Judgement comes from Bad Experience.
08-24-2003 Over year old.
 
 
irq
Key Veteran
Location: San Diego, CA

The advise pilotError gives is not correct. It applies to the Supernova but not to the Triton. In the Triton, you should use the NiMH mode for NiMH batteries, NiCd for Nicd, etc.

5mV as a peak detection value is a bit low for some packs. Try setting it to 7mV. If this is a brand new pack, you should slowcharge it at first (.2A is a good value for that - notice I said "point two"). Do that and then discharge it (.2 again) and charge it again at .2. At that point you should be good for fast charging, but like they said, take it easy. Tell me the specs of your battery and I'll tell you what I think is a good fast charge rate:

o How many cells?
o What size are the cells? (AAA, AA, A, C, D, etc)
o How much is the mAH capacity?

As for the auto option, I've never used it, so I have nothing to say about it, good or bad.
08-24-2003 Over year old.
 
 
jasonmolinari
Senior Heliman
Location: Atlanta, GA

IRQ, i've been using the pack as an Tx pack, its an 8cell AA i believe 1400Mah. I have used this pack for a while so it is not new.
I'm thinking i just had a false peak..i'll have to try it again.

thanks
jason
08-24-2003 Over year old.
 
 
irq
Key Veteran
Location: San Diego, CA

You should never get a false peak if you input the correct parameters. I would not charge that pack faster than 1A. Give it a peak value of 7mV or so and it should be okay. Fast charge it sometime when you'll be around and see how hot it gets at the end. It'll be pretty warm but if its really outrageous, try a peak value of 6mV.
08-24-2003 Over year old.
 
 
jasonmolinari
Senior Heliman
Location: Atlanta, GA

Ok, i'll give it a try, i charged it at 1C last time and that is when it finshed charging after putting in only 750mah. I had the peak detection set to 5..

The lower the peak detection the sooner it cuts out right ? Becuase it'll drop by that value sooner?

thanks
jason
08-24-2003 Over year old.
 
 
irq
Key Veteran
Location: San Diego, CA

Theoretically, yes. Also, in general, the higher the amps you pump into the battery, the sooner it will hit the peak value too. In other words, slowcharging with a peak value of say 4, it may never hit it. But if you try fast charging, it might.

I bought a single C sized cell for a glow plug igniter once, 4500mah. I wanted to slow charge it the first time. I left the delta peak at whatever the default is (8 i think) and it just never hit it. My Triton was set to stop charging if it pumps in 5000mah so it hit that and finished At such small currents it doesn't matter if it kept charging forever anyway.
08-24-2003 Over year old.
 
 
jasonmolinari
Senior Heliman
Location: Atlanta, GA

Where in the Triton do i set the max "in" amperage?

thanks
jason
08-24-2003 Over year old.
 
 
irq
Key Veteran
Location: San Diego, CA

It's somewhere under the non-charging menu. In other words, keep pressing the Menu button until you're not in the list of charging/discharging choices. Once in this area, use the jog dial to scroll around until you see the Max Input screen. It's probably not labeled exactly "Max Input".
08-24-2003 Over year old.
 
 
Ed_R
Heliman
Location:

I'm using an Intellipeak to charge up my nimh 800 ma 9.6 volts for the Hornet. I've got the rate set at 1 amp, and it's taking an hour and 15 minutes to click off peak.

I seem to be exceeding the ma max charge rate, but my charge times are exceeding the math. THat tells me tha tthe charger really isn't set up to do NIMH, right?
08-24-2003 Over year old.
 
 
irq
Key Veteran
Location: San Diego, CA

Ed_R, the delta peak value it is using might be a bit too high. Another possibility is that your pack's actual capacity might be a bit higher than 800mAh. I had a 4500mah pack that consistently went to 4700 before. One final thing to consider is the fact that no battery is 100% efficient with charging. This means that charging a 1000mAh battery with a rate of 1A will take longer than 1 hour to charge, but usually not this much more.
08-24-2003 Over year old.
 
 
jasonmolinari
Senior Heliman
Location: Atlanta, GA

IRQ, i just realized that nowhere in the cycling menu of the Triton do i tell it how many cells it is working on. How does it know how many cells there are?

jason
08-24-2003 Over year old.
 
 
irq
Key Veteran
Location: San Diego, CA

Um, wow. You should stop using this thing until you set this This is done under the Batt Type button and you really should look at the directions for more information. Getting the number of cells correct is very important for charging.
08-24-2003 Over year old.
 
 
Rmac41
Senior Heliman
Location: Stockbridge,Ga

Same problem here

I`ve tried 2 different tritons,On a 2000 mah nimh.It would always discharge more than twice what it would put back no mater what charge /discharge rates. no mater what peak sencitivity.
I finaly gave up and bought a $ 50 hobbico mkII.
I`m going to check out this new Super Brain as soon as I get a chance. Any one know any thing about it?

Rick McCullough < Stockbridge, Ga.>
08-24-2003 Over year old.
 
 
irq
Key Veteran
Location: San Diego, CA

Rmac41, either the battery was messed up or more likely, you programmed your Triton incorrectly. Some gizmos just aint for some people
08-24-2003 Over year old.
 
 
jasonmolinari
Senior Heliman
Location: Atlanta, GA

IRQ, i hate to sound like an idiot but i can only see how to set the battery data if i use the memories. If i don't use the memories, how does it know if it is discharging a 5,4 or 8 cell pack in the cycle mode. In discharge mode only you can set what voltage for the pack to go to..but in cycle it goes to 0.8v/cell..but you don't specify the # of cells?

jason
08-24-2003 Over year old.
 
 
irq
Key Veteran
Location: San Diego, CA

That's a good question. I tried finding the answer myself am at a loss. I just always use the battery memories... maybe you should too?
08-24-2003 Over year old.
 
 
Ed_R
Heliman
Location:

I kinda figured it was doing wqhat it was programmed to do, and that I didn't really have much control over the situation, IRQ. cI coudl akways set the amperage up to 2*C and cook a steak on the battery while I'm charging, huh?


What I'm gathering from this topic is that there's no solution the problem of fast-charging NiMH batteries in 15 minutes or less and still expect them to last more than a couple flights. I understand that NIMH is a lot more volatile than NICAD, and that the only way for me to stay in teh air for more than 10 minutes ( assuming a 5 minute flight duration) is to increase the number of batteries in rotation.

I'm also guessing that your recommendation for a charger is either the ALpha 4 or one of the Schultzes? This Intellipeak works well for cars but I think for helis it's porbably going to be lacking.
08-24-2003 Over year old.
 
 
jasonmolinari
Senior Heliman
Location: Atlanta, GA

i could use the memories, but then you can't use hte automated cycling functions!
jaosn
08-24-2003 Over year old.
 
 
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e-Electric Batteries & Chargers > Triton NiMH question
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