Cycling new battery

Cycling new battery
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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> Cycling new battery

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Cycling new battery - 7/13/2006 7:13:57 AM

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From: longview, WA, USA
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I just recieved my new battery a SANYO 9.6v 1100mAh Ni-Cd for my futaba transmitter and was wondering if it is okay
to cycle the battery in the futaba transmitter with my new Accu-Cycle Elite. If so can some one please give me some directions?

RE: Cycling new battery - 7/13/2006 9:37:29 AM

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I would not recommend using the Elite until after the pack has been form charged. Use your wall wart to charge the new pack at C/10 and the Elite to discharge it at C/5. Do this three times to form the pack, then switch to the Elite for the fourth cycle to peak the pack and establish the capacity for future reference. The Elite will not slow charge very well and may cutoff too soon (I know I have tried).

You will find that the default (Auto) settings on the Elite are very conservative and can be used without fear of overcharging. That being said after you set the battery type and number of cells, change the cutoff voltage from 1.1V to 0.9V. I would also recommend changing the peak sensitivity to 10mv for Nicads and 5mv for Nimh. I love my Elite and have found it to be very dependable and accurate.

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RE: Cycling new battery - 7/13/2006 11:54:33 AM

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I form charge with the Elite all the time.
It is easy. Not sure why a statement like that would be made.
If you know how to use all the quirks of the charger, you can put as much or as little energy in the packs as you want.

quote:

ORIGINAL: olstoney

I would not recommend using the Elite until after the pack has been form charged. Use your wall wart to charge the new pack at C/10 and the Elite to discharge it at C/5. Do this three times to form the pack, then switch to the Elite for the fourth cycle to peak the pack and establish the capacity for future reference. The Elite will not slow charge very well and may cutoff too soon (I know I have tried).

You will find that the default (Auto) settings on the Elite are very conservative and can be used without fear of overcharging. That being said after you set the battery type and number of cells, change the cutoff voltage from 1.1V to 0.9V. I would also recommend changing the peak sensitivity to 10mv for Nicads and 5mv for Nimh. I love my Elite and have found it to be very dependable and accurate.

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RE: Cycling new battery - 7/13/2006 3:38:14 PM

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Geist,
Sorry, but I am not as educated as you are in regards to the Elite and perhaps do not know the "quirks" as you do. If you remember I did solicit your advice when I first received mine. As stated, I have had a problem with the charger terminating early when trying to charge at C/10 and have not been able to overcome that reliably, so I use the Digipulse for slow charging.

Perhaps instead of micro managing my post in trying to help trdexter, you could help tell us both how to properly set up the charger to form charge.

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RE: Cycling new battery - 7/13/2006 5:33:37 PM

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Please explain.

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RE: Cycling new battery - 7/13/2006 10:36:47 PM

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trdexter,
I'm waiting for Giestware to chime back in. I have found him to be knowledgable, but he needs to tell us both how to slow charge with the Elite. I tried several times and the charger cutoff (maybe peaked) prematurely and charging at the factory default settings confirmed that. I am sure that the solution is simple and I just need to learn as you what to do.

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RE: Cycling new battery - 7/13/2006 10:59:47 PM

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He guys..here is a link that shows how to do it..right from the horses'..um I mean Geist's mouth!!

http://www.rcuniverse.com/forum/m_4454660/anchors_4454660/mpage_1/key_/anchor/tm.htm#4454660

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RE: Cycling new battery - 7/13/2006 11:20:13 PM

guver

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Two things come to mind are to set rate to c/10 and set capacity to 100 % if it allows a max of 150% then use the max mv and 1 more cell than is in the pack. I should try it and see how it does.

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RE: Cycling new battery - 7/13/2006 11:25:45 PM

guver

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All the packs I have seen at c/10 will still show a voltage drop when full, whether or not it is fast enough needs to be figured, but the peak detection cannot be disabled.

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RE: Cycling new battery - 7/13/2006 11:42:58 PM

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Here is the post from the other thread.
Look at it this way. With the 150% autoshutoff, you can set the exact maH you want in a pack. Just set it and when it shuts off for capacity, you are done. To me this is better than a timer or a wall wart which will have it's charger current change slightly with cell resistance, number of cells in a pack, and cell voltage.
--------------------------------------------
I use 1800maH NiCad packs.
I want to charge it at C/10 for 12 hours.
C/10 is 180ma times 12 hours or 2160ma
I then multiply this times 2/3 and get 1440maH.
I set it for 1500maH and know the pack will only run for 12.5 hours before it shuts off for over charge. I don't have to worry about the pack getting too hot due to a charger failure.

I do the same thing for a quick charge. If I think half the pack is gone, I set it to charge a C or 1.8 amps but say the capacity is 2/3 of half or 1800/2*0.67 or 600maH. The charger will not put more than 900maH into the pack.
If the pack is completely down to 1.1 volt per cell. I just say it is a 1200maH pack and charge it at 1.8 amps. Since doing this, I have NEVER damaged a pack.

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RE: Cycling new battery - 7/14/2006 1:50:32 AM

guver

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You sound like you do not trust it to shut off, I suppose I can see it for a forming charge, but how do you get it to not stop when the pack voltage drops? I've been using mine every day and use the charger "normally"

I did however just set up a 3000 pack that's dead and set the charge for 200 ma and the trickle for 200 ma also hoping when the peak stopped it will still trickle at the same rate. I will graph the voltage and post it when done, it will be over 15 hrs if it's successfull.

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RE: Cycling new battery - 7/14/2006 4:19:53 AM

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I do trust it to shut off, when doing a forming charge, I have found that using the peak shutoff for forming may make it shut off prematurely. You can change the peak shutoff setting so that it goes a longer or shorter time before shutting off.

What is your specific application?

quote:

ORIGINAL: U-dUd

You sound like you do not trust it to shut off, I suppose I can see it for a forming charge, but how do you get it to not stop when the pack voltage drops? I've been using mine every day and use the charger "normally"

I did however just set up a 3000 pack that's dead and set the charge for 200 ma and the trickle for 200 ma also hoping when the peak stopped it will still trickle at the same rate. I will graph the voltage and post it when done, it will be over 15 hrs if it's successfull.

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RE: Cycling new battery - 7/14/2006 5:45:19 PM

guver

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I messed it up by forgetting about the max timer, it shut off after 999 minutes. I'll do another one bumping up the rate to c/10. I also set the peak to a normal value to see if it wil detect it. My batt is an 8 cell 3000.

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RE: Cycling new battery - 7/23/2006 2:21:38 PM

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Well I thought I would post my results so far with forming some new NIMH's..

1400MAH 6v packs brand new..all discharged to 1.1v per cell..

I decided to put one on a wall wart to try a comparison between it and using the Elite..my first charge on the Elite I set it up like Geistware suggested..I set the capacity to 1200mah's..the charge rate was .15 and the peak sensitivity was .5///the first time both packs took in exactly 1800 mah's and the Elite shut down..I discharged and pulled 1350mahs from both packs..did another charge using the exact same settings and this time both packs only took in 1580 mah's and the charger went into trickle!! I discharged again to 1.1v per cell and got 1350 mah's again..ok so on the third charge I increased the capacity from 1200 to 1400 and kept all the other settings the same..the Elite went into trickle after 621 minutes and put in 1574mahs

Now the third pack I had on a 50ma wall wart..discharged down to 1.1v per cell and charged for 16 hours..then I discharged it and got 1300 mahs..I put it on the Elite with the same settings as the other 2 packs and it timed out after 823 min and put in 2071 mah's!

So far Ive cycle/charged all of the packs 3 times..

Is it possible to manipulate the Elite (or any peak charger) by setting the peak sensitivity to the max and program the capacity to equal a 16 hour charge?

< Message edited by Josey Wales -- 7/23/2006 4:01:11 PM >

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RE: Cycling new battery - 7/23/2006 7:15:59 PM

guver

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It will do 999 minutes max and 150% of capacity. Manipulate those numbers to equal what you want and set the mv to the highest setting. My last one I bumped the rate to 300 and started the graph and all, I had other chargers that were done chargeing and turned off my main power in a rush to leave.

Well anyways I turned off my test, lol I may just give up.

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RE: Cycling new battery - 7/23/2006 7:40:48 PM

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I think that is the problem..I have the mv setting to low at .5..Im going to do a 4th charge and set the mv to 15..the closest I can get to a c/10 is .150

so I figure this:

1400mah pack
.150 x 16.6 = 2490
2490*2/3 =1700

Ill set it to 1700 capacity at .15 and 15mv

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