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HomeRC & Power✈️Aircraft🚁Helicoptere-Electric Battery-Charger-pSupply › how to make batteries balance better?
03-30-2012 11:26 PM  7 years ago
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readytofly

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how to make batteries balance better?
hey guys,
i bought two used batteries. the guy told me he'd used them only 12 times, but the problem is that the cells don't balance. they read very differently after the balancing, but they don't look like if they were involved in a crash.
i wonder if there is a way to make them balance better.
i think this is the reason those batteries can't provide enough power to the motor. it's only 70% of what it should be.
thanks a lot.
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03-30-2012 11:31 PM  7 years ago
JKos

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Redondo Beach, CA

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I hope you didn't pay very much for those batteries because it sounds like they are done for. Used batteries are always a crap shoot because you just never know. It takes very little abuse to ruin LiPo batteries.

Continuing to use batteries with known bad cells can lead to disastrous results.

What equipment are you using to balance the cells?

- John
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03-30-2012 11:41 PM  7 years ago
readytofly

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hey jonh,
i use a icharger 3010b.
so you think those batts are crap?
a mate told me he has a two-meter (don't know the real name) that kind of balance the cells without charging them and that he managed to recover some batts in the same situation.
too good to be true, right?
thanks
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03-31-2012 12:30 AM  7 years ago
flyride

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Salt Lake City UT

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Put them on the I charger and change the balance to slow and charge at a 1c rate and just let it do it's thing until it won't balance out anymore if the charger times out before the balance is done just restart it. It may take a few hours but it may work. I have had a few that are stubborn but did finally get them balance close to each other. How far are your cells out of balance.and the blonde said "RECTUM, Hell damn near killed em!!"
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03-31-2012 12:56 AM  7 years ago
Shortman

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Portland, Oregon

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If you using the iCharger 3010B check each individual cell IR and report back what you find. Hopefully they are close in measurement to each other. That will help you identify the bad cell or cells.

Secondly, charge REAL SLOW, at C/10 rate, not 1C. LiPos out of balance can be "nursed" back to health sometimes by slowly charging and bringing the voltages back in line together.

So if your using a 3000mah pack, charge it at 0.30 amps not 3.0 amps, etc.

A huge resource for lipo...
http://www.rcgroups.com/forums/show...962&postcount=2
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03-31-2012 04:58 AM  7 years ago
flyride

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I just said 1c because when you get to balance the icharger slows the rate way down anyway so it doesn't matter if it is 1c or 1/10c as the balance rate is super low on either setting and from my experience trying super low rates or 1c didn't seem to make a difference as the cells charger up the same until the balance kicks in at the end and the charge rate drops. Not saying I am right or wrong but I have tried both ways and have had pretty good success either way.

Anyway Good luck with the lipo
and the blonde said "RECTUM, Hell damn near killed em!!"
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03-31-2012 03:39 PM  7 years ago
GetToDaChopper

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Las Vegas , NV

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i haven't used a lot of chargers i and DON'T want to turn this into a "my charger is better than yours" thread, having said that, at the moment i have a power lab 6 and it starts it's cell balancing whenever the cell voltage is 3.80 or higher and it will do whatever it has to to keep the cell voltage the same all the way to full charge of 4.20 even if it has to dump off the cell charge amperage or voltage to one or more cells, when i watch the cell volt during charging they are always spot on the same all the way to full charge, and it's like that no matter what charge rate i use from 1C or less up to 6C or higher it's alway the same, is yours not like that during charging ?    ▲
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03-31-2012 05:59 PM  7 years ago
flyride

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Salt Lake City UT

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On my icharger it charges all the cells with power until it is close to the 4.2 per cell then it starts to cut power to the cells that are high until the lower cells catch up. Basically the balance takes place at the end of the charge. So if I had a cell that was at 3.7 and the 5 others were at 3.8 it usually stay about that far out until the end when it catches up durring balancing. And I have it set to balance charge. Unless there is an update or something for the icharger this is how it has always been on mine.and the blonde said "RECTUM, Hell damn near killed em!!"
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03-31-2012 09:58 PM  7 years ago
GetToDaChopper

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Las Vegas , NV

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Oh i see, i just assumed that all chargers were the same more or less, i use to have a Hyperion EOS 0720i NET3 AC/DC charger but i can't remember how it use to balance cells as it charged.    ▲
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04-28-2012 02:32 AM  7 years ago
3dgimble

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Rochester

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PL8 has better balancing than 3010B OVERALL and is Way better in quality and design.


I can personally say DO NOT BUY the Icharger 3010B, I bought two of them, I thought it was a good charger, I was inflated by a Pro that gassed me up and told me it was, the PL8 is much better charger. Icharger is really cheap. Only has one small fan, gets SERIOUSLY HOT, and can explode.

It will never last if you are doing SERIOUS parallel charging or discharging 6S at the full 80 watts.
I have owned both PL8 and 3010B. The 3010B can be dangerous must be watched very carefully when using, it will also require an additional fan on back of it because of serious heat coming from it.

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04-28-2012 02:39 AM  7 years ago
TheWoodCrafter

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Costa Mesa, Ca.

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I have heard stories of rumors of guys that had problems with 3010B chargers.

It was a while back.

I have never met an actual guy that had problems.
Didn't believe they were real.

I have a 306B and use the hell out of it with no problems.
Thanks, TheWoodCrafter
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04-28-2012 02:47 AM  7 years ago
Tyler

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Chicagoland area

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My two iCharger 3010b's are working great so far. I charge at 20A and 30A all the time, sometimes simultaneously.

Tyler
Enjoy things that money can buy IF you don't lose the things money can't buy.
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04-28-2012 02:55 AM  7 years ago
Shortman

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Portland, Oregon

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PL8 has better balancing than 3010B OVERALL and is Way better in quality and design.

I can personally say DO NOT BUY the Icharger 3010B, I bought two of them, I thought it was a good charger, I was inflated by a Pro that gassed me up and told me it was, the PL8 is much better charger. Icharger is really cheap. Only has one small fan, gets SERIOUSLY HOT, and can explode.
It will never last if you are doing SERIOUS parallel charging or discharging 6S at the full 80 watts.
I have owned both PL8 and 3010B. The 3010B can be dangerous must be watched very carefully when using, it will also require an additional fan on back of it because of serious heat coming from it.
That is an exaggerated claim lol. There are thousands of iCharger 3010b's out there that run perfectly fine. To say the PL8 is superior is a little opinionated and short sighted in my opinion. The PL8 IS a great charger, but the 3010b is very good as well.
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04-28-2012 02:57 AM  7 years ago
Tyler

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Chicagoland area

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I have discovered that some batteries need a few gentle cycles to balance out well. Go ahead and try them out, just discharge lightly and recharge slowly. They may come around.Enjoy things that money can buy IF you don't lose the things money can't buy.
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04-28-2012 03:01 AM  7 years ago
Jaccojenkins

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albany ga

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I wont ever buy used batteries from anyone again. Ive done it twice and both times they got me pretty good.
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04-28-2012 04:37 AM  7 years ago
TJinGuy

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Socorro, NM - USA

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just to point out ... the icharger comes set to only balance during the cv stage of charging, but it can be set to always balance.- Chris

Team New Mexico
TJinTech
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04-28-2012 04:58 AM  7 years ago
Gregor99

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Western Wa

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i haven't used a lot of chargers i and DON'T want to turn this into a "my charger is better than yours" thread
Too late! One thing not mentioned is that the Powerlabs balance up to 1 amp. Most chargers are 250ma, with the 306b and the 3010b being 500ma.

With that said, lets get back on track and try to help the OP. Assuming the cells are not too far off, I think Chris makes a good suggestion here.
the icharger comes set to only balance during the cv stage of charging, but it can be set to always balance.
I've taken the liberty to get a screenshot of the 3010b manual where this is discussed (page 9). I would put the 3010b in the balance mode of "always". This will cause the balancing to start earlier (see the bottom section in the attachment). Once the battery has been recovered, you can move it back to the default setting of CV Phase. This will help speed up your charges for otherwise healthy packs.

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04-28-2012 03:32 PM  7 years ago
readytofly

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I would put the 3010b in the balance mode of "always". This will cause the balancing to start earlier (see the bottom section in the attachment). Once the battery has been recovered, you can move it back to the default setting of CV Phase. This will help speed up your charges for otherwise healthy packs.
very interesting suggestion.
btw, those batteries finally balanced. unfortunalely i have some batteries involved in crashes that can't balance anymore. i think those are gone for ever.
thanks.
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04-28-2012 03:37 PM  7 years ago
readytofly

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as to the complaints about icharger, what i do to avoid problems is never using it and the PS at its maximum.
if the charger is 30a, i won't go beyond 25a.
so far, so good.
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