RE: Storing Lipo batteries at 100%

RE: Storing Lipo batteries at 100%
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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> RE: Storing Lipo batteries at 100%

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RE: Storing Lipo batteries at 100% - 8/10/2007 11:25:30 AM

PlaneHeli

Posts: 608
Joined: 2/1/2006
From: Australia & Asia &, NEW ZEALAND
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Thanks again for the replies.

Ill set the ESC to a lower cutoff voltage.

I did set my additional low battery alarm to a setting that would require an 80% charge. However those 2 lipos ruined after storing them at 100% for 6 weeks due work comitments. So with the new batteries I was more cautious. Too cautious now me thinks.

Will aim for 3.7V no load cutoff and see what happens. Then I will just store them at that voltage rather than charge and store.

Would be doing it now instead of proscratinating about it LOL,but im away for work now, so will have to wait.

Cheers.

< Message edited by PlaneHeli -- 8/10/2007 11:29:15 AM >

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Post #: 26

RE: Storing Lipo batteries at 100% - 8/11/2007 7:49:49 PM

bldrums

Posts: 478
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From: C-Ville, VA, USA
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I bought the Equinox and it will discharge my lipos as it should but when I connect with my AccuCyle Elite the charger reads " check connections to battery"

Anyone have any Idea , I inspected the connectors ( looked ok ) and tried reinstalling the unit with several batteries from 1800mah to 800 mah with no luck.
My batteries will charge ok on the AccuCyle without the Equinox.

thanks , bill

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Post #: 27

RE: Storing Lipo batteries at 100% - 8/11/2007 10:00:14 PM

mrasmm

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From: Sometown, Northern Utah, USA
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quote:

ORIGINAL: bldrums

I bought the Equinox and it will discharge my lipos as it should but when I connect with my AccuCyle Elite the charger reads " check connections to battery"

Anyone have any Idea , I inspected the connectors ( looked ok ) and tried reinstalling the unit with several batteries from 1800mah to 800 mah with no luck.
My batteries will charge ok on the AccuCyle without the Equinox.

thanks , bill

you have to plug the battery into the EQ and then wait about 2 or 3 seconds and then press the button two times about 1/2 to 1 sec apart. The LED next to interface mode should be blinking red. I would imagine this is what your problem is.

If you mess up and it is blinking green next to quick balance mode, press and hold the button until the lights flash and that will reset the EQ, just like unplugging and replugging the pack, but without having to do that. =)

clear as mud? hehe, lemme know if that makes sense.

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Post #: 28

RE: Storing Lipo batteries at 100% - 8/11/2007 10:03:39 PM

mrasmm

Posts: 4421
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From: Sometown, Northern Utah, USA
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quote:

ORIGINAL: PlaneHeli

Thanks again for the replies.

Ill set the ESC to a lower cutoff voltage.

I did set my additional low battery alarm to a setting that would require an 80% charge. However those 2 lipos ruined after storing them at 100% for 6 weeks due work comitments. So with the new batteries I was more cautious. Too cautious now me thinks.

Will aim for 3.7V no load cutoff and see what happens. Then I will just store them at that voltage rather than charge and store.

Would be doing it now instead of proscratinating about it LOL,but im away for work now, so will have to wait.

Cheers.

I just took some lipo's out of long term storage today. What I found was they were just fine in balance, but as soon as I put a load on them, they went out of balance fast. So I put a 1/2C discharge on them, then a 1/2C charge on them, and I'm gona see if that wont help bring them back. I'll run a 2C discharge on 1 pack and see if it goes down pretty even, if it doesn't I'll run it through another cycle or two to bring the pack back.

BTW the reason I mention this is because I haven't been flying for about 6 weeks because a servo started twitching on me, and I was always going to get around to it. Anyways needless to say I didn't get around to it for a while, and my packs got left at 100% charge. So far they are cycling to their full capacity =) Haven't put them in the heli yet though because it's not quite up and running. I did the mods for the new servo's, now I've just gota mount them and reset the swash and the tracking =)

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Post #: 29

RE: Storing Lipo batteries at 100% - 8/12/2007 12:42:20 AM

bldrums

Posts: 478
Joined: 9/30/2002
From: C-Ville, VA, USA
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When you say a
1/2 C charge and a 2C discharge, what is the value of C ( 1800mA ) (2200mA) packs ?

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Post #: 30

RE: Storing Lipo batteries at 100% - 8/12/2007 6:09:48 AM

PlaneHeli

Posts: 608
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mrasmm,

Interesting to see how you get on with your packs.

Thats exactly how mine ruined. 6 weeks stored at 100%. Mine were store in a warm place.

Now store them in a fridge.

Let us know if theyre ok.

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Post #: 31

RE: Storing Lipo batteries at 100% - 8/12/2007 12:39:17 PM

mrasmm

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From: Sometown, Northern Utah, USA
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yeah, you've got it =) C just basically means capacity, like the capacity of the pack. So if you've got a 1800mAh pack 1/2C is 900mA 1C is 1800mA and 2C is 3600mA

PlaneHeli, I'll be sure to let you know. I've stored mine at between 68 and 74F the whole time. Dunno how that compares to what you've been doing. one 800mAh pack and 2 1250mAh packs

if I haven't responded within about a week then I've probably forgotten, just PM me or something =)

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Post #: 32

RE: Storing Lipo batteries at 100% - 8/12/2007 3:56:20 PM

bldrums

Posts: 478
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From: C-Ville, VA, USA
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mrasmm
Your right on the money , I had not programmed the Equinox interface properly. Now it works great. The orange LEDs flash #1 intermittently for most of the charge on my 1800 pack. The LEDs flash #1 and #2 intermittently on my 2200 pack. When the light is flashing, is the balancer increasing the charge on that cell or holding off. ?

Anyway, I flew each batt for approx 15-20 minutes and they worked fine.

As a complete newbie to elect flight ( especially LIPOs) I have been moved to creating a log and have spent my whole Sat. charging every battery I own ( 3 chargers going at once ), repairing connectors etc. It was sorta like watching paint dry.

..............................whew ... I modified a steel tool box to chg and store Lipos and have a small cooler with some ice packs for transporting, keeping the batts in plastic just to be sure they dont get any dampness. FORCED TO ORGANIZE the electric area of my shop after 15 years!!!! Being a drummer for 35 years in a busy part time band

, man, I am serously running short on spare time!

Typhoon 2-3D
Stryker
Blade 2 heli
Super Skybolt /1.25 Saito
4*40/ Saito .56
Decathlon ARF /Saito .82
GP SpaceWalker ARF/ Saito .90
Spad combat /some kinda .40 2 stroke

Thanks!! Couldnt doit with out yall

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Post #: 33

RE: Storing Lipo batteries at 100% - 8/12/2007 4:09:51 PM

mrasmm

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From: Sometown, Northern Utah, USA
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good deal, glad you got it working =)

As far as the EQ, when it is blinking it is doing a sink, up to 120mA

Sounds good to g through and charge up all your packs. That's good to keep them from going bad so quick (except lipos that need to be stored about 3.7 or 3.8v per cell). As far as the metal can for the lipo's that's really good for the fireproofing, just make sure there is no way for the battery leads to somehow short against the metal container and actually cause the fire =) Sounds like you may already have that taken care of though.

hehe, I bet you are short on your time =)

you're welcome

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Post #: 34

RE: Storing Lipo batteries at 100% - 8/12/2007 5:21:54 PM

bldrums

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From: C-Ville, VA, USA
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Ever seen one go off?

http://hackedgadgets.vodpod.com/pod/show_video/1188

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Post #: 35

RE: Storing Lipo batteries at 100% - 8/13/2007 5:24:26 PM

Darkbird

Posts: 291
Joined: 10/13/2002
From: Jackson, MI, USA
Status: offline

WOW!! glad that wasn't my laptop. OK now that I'm convinced that I need to store my LiPos discharged I have a question. I have the triton jr and it won't let me select anything between 9.0 and 12.0 for a cutoff voltage. To get 3.7 volts per cell no-load will the 9volt cutoff be too low, and if so, could I just switch to NiCd or NiMh mode and set the cutoff at 11.1(3.7 v per cell). My budget is very tight and I can't afford to kill a pack by overdischarging it. Once I know this I can adjust for my other packs which are only 2 cell.

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Post #: 36

RE: Storing Lipo batteries at 100% - 8/14/2007 5:40:33 AM

mrasmm

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From: Sometown, Northern Utah, USA
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not sure about the triton jr, but 9.0v discharge under a load will be fine to completely drain your battery, but it probably wont be fine to store your lipos

you can either change the discharge voltage, which it sounds like you don't know how to do with that chargerr, and I don't have that charger or know much of anything about it, so that wont really be an option. The other thing is you can change the max charge mAh by either changing the battery capacity to half, or in the actual charge setup depending on your charger. Also you can just discharge them in whatever you use your lipo's in until they reach that 3.8v per cell.

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Post #: 37

RE: Storing Lipo batteries at 100% - 8/29/2007 11:26:14 PM

mrasmm

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From: Sometown, Northern Utah, USA
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quote:

ORIGINAL: PlaneHeli

mrasmm,

Interesting to see how you get on with your packs.

Thats exactly how mine ruined. 6 weeks stored at 100%. Mine were store in a warm place.

Now store them in a fridge.

Let us know if theyre ok.

ok so I'm back with the results, I did 2 cycles for each pack 2C discharge 1/2C charge and the packs are in full working order. I got a flight on each of them today, and they all took how many mAh they had been taking before I stored them. Total storage time was probably close to 2 months, but the last week or two they were stored at 3.8v per cell, so I dunno how that played into it either.

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