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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › lipos charge and balance in SERIES or PARALELL???i say SERIES
06-02-2011 01:02 AM  9 years ago
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toejab

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Buffalo ,New York area

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lipos charge and balance in SERIES or PARALELL???i say SERIES
i made my Y harness per the directions and also have one that came to me with some lipos...the batteries are definately in series....IN on the neg. OUT on the pos. and INTO the second lipo on the neg. and OUT on the positive. the charger sees them as series...two 5s =10s...tell me if i am wrong here.larry
this is one of my Y harnesses...

IF I AIN'T FLYIN' - I'M PROBABLY BUYIN'
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06-02-2011 01:08 AM  9 years ago
TheWoodCrafter

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Costa Mesa, Ca.

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That sure sounds like series.

Did someone tell you different?
Thanks, TheWoodCrafter
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06-02-2011 01:13 AM  9 years ago
toejab

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Buffalo ,New York area

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.yep
i have another post and two different guys say that they never heard of charging lipos in series...got me wondering
IF I AIN'T FLYIN' - I'M PROBABLY BUYIN'
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06-02-2011 01:40 AM  9 years ago
AltecLansing

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North Carolina

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I'm guessing here, but it seems they charge in series but balance in parallel.Man, I miss the eighties.
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06-02-2011 01:54 AM  9 years ago
MikeM

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Austin, Texas - USA

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What you should probably be doing is charging in parallel, or else only charge one battery at a time. The series Y harness you made is for flying, not charging.

Updated: Having said that I am not familiar with your TP charger so it may well be instructing you to charge in series with that series Y adapter. However, everything I've read suggests charging in parallel. I use an iCharger with 6 way harnesses so I can charge up to 6 packs in parallel up to 6s each.

Based on this and your "puffy lipo" post I recommend you do some reading

here

http://www.rchelicopterfun.com/rc-lipo-batteries.html

and here
http://www.rchelicopterfun.com/rc-battery-chargers.html

Hope that helps
Mike
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06-02-2011 01:54 AM  9 years ago
swoop_g

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Lake Charles, LA USA

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I am one of those guys and let me start off by saying I was wrong but the way he worded it I simply thought he typed series instead of parallel. I know now why he charges in series as last night I didn't think of the scenario of having a HV system and using two lipos to get the high voltage. Sorry, I didn't mean any disrespect toejab. Simple mistake.
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06-02-2011 02:02 AM  9 years ago
swoop_g

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I have read somewhere that if use two batteries in series to power your aircraft then you should charge those two batteries as one pack. It has something to do with the way it discharges and charges as one unit. I would have posted the link but I can't find it. It makes sense if you don't think about it.
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06-02-2011 02:07 AM  9 years ago
tadawson

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Lewisville, TX

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You would want a balancer that could handle all the combined cells as one pack to truly do it right in series. After all, a 6S pack is nothing more than 6 cells in series, the same as two 3S packs . . .

I do agree that they should be discharged together to be charged together - different levels of charge in two packs, and no balancing could lead to major issues. If you can balance as a 6S pack, then that issue is pretty much moot.

Something like a blinky across each pack should work as well - if any cell is getting overcharges, it will just take the power away from that cell, same as if one big pack that is out of balance.

- Tim
Friends don't let friends become electrotarded . . . .
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06-02-2011 02:19 AM  9 years ago
toejab

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Buffalo ,New York area

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glad for the input
swoop g...no harm.i appreciate the input as i am a little confused here.
if the y harness is only for flying and not charging,then how do you properly charge and balance two lipos that fly as one??[I]
IF I AIN'T FLYIN' - I'M PROBABLY BUYIN'
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06-02-2011 02:24 AM  9 years ago
tadawson

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Lewisville, TX

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You would need to make a Y harness (well, not really a Y, but a split) that took the 6S balance connector and adapted it to take the two 3S balance connectors, at least in my example of a 6S pack . . .

Electrically then, the charger would see it the same as any other 6S pack, and if the two were differently discharged, the charger would see it as a 6S with a mother of an inbalance, but should still handle it.

- Tim
Friends don't let friends become electrotarded . . . .
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06-02-2011 02:45 AM  9 years ago
Rogman88

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West Monroe, LA

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My experience with series charging...
On my icharger 201B I can charge two of my 3S 1250 mah rhino packs in series using the balance leads off the balance board. The problem is, if you don't put them in the balance slots in the right order then pin one will start to melt on the second battery. It makes a loud spark and you can pull it out quickly before it's ruined. But yes it does see the two batteries as one 6S pack.

I then charged them without balance using the series connecter and cell #1 on the second pack went up to 4.37

I don't charge in series anymore. I now parallel charge batteries as if one battery has more juice in it, it will simply pour out the extra into the second pack and balance out. I have a paraboard on the way which will speed up charging tremendously and allow balancing at the same time. Of course you don't want to paraboard any battery with a bad cell as it can cause high voltage in the other cells on the batteries in that balance tap. That's another story.
High Voltage just works better
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06-02-2011 02:53 AM  9 years ago
toejab

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Buffalo ,New York area

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thanks
both Rogmann88 and MikeM use the icharger...maybe that is the way to go...mike charges 6 lipos at once,,,that would be great!
as for how i am doing it now....
i use the y harnes for charging as well as flying. i believe that i am doing everything correctly,i will double check with customer service tomm.i dont know why a lipo would puff when the charger was only bringing the charge down a little to get it to 3.85 for storage?any answers/suggestions?thanks,larry
IF I AIN'T FLYIN' - I'M PROBABLY BUYIN'
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06-02-2011 05:27 AM  9 years ago
swoop_g

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Lake Charles, LA USA

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If you were using the charger to discharge to 3.85v per cell then you would need to hook up the balance plug to the charger. To do that correctly you need a balance Y-plug as well. Do you? It makes two 5s balance plugs into one 10s balance plug. I bet you only plugged one battery into the charger and the charger didn't know what was going on and fried one of your batteries. I hope I am wrong this time! Whatever the case I bet you know whats going on for the future.
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06-02-2011 05:49 AM  9 years ago
toejab

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Buffalo ,New York area

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nope all was hooked up properly,must have just been that batteries time to go.IF I AIN'T FLYIN' - I'M PROBABLY BUYIN'
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06-02-2011 05:55 AM  9 years ago
swoop_g

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Lake Charles, LA USA

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I'm not familiar with that balancer but if it was meant for parallel then it could cause problems. I am just not experienced enough to help further. Sorry.
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06-02-2011 08:46 PM  9 years ago
RCSavager

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Topeka, KS

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The adapter you have will plug two 5S packs (in your case) into one large 5S pack. The key here seems to be that you would need two balance leads, a balancer for each pack or a y-style balance plug to properly balance both batteries at the same time. Even then you are not INDIVIDUALLY balancing each cell. You would be balancing two cells (one from each pack) as if they were one cell. IMHO this is both dangerous and not an optimal way of doing things. If one of the cells in a "pair" went out it would try to do things that would set your house of fire.

Simply don't use the adapter for charging. Charge everything as one pack and use your adapter to double the mah of your packs in your bird. End result = what you are doing is dangerous and NOT balancing each cell individually. You're just asking for trouble. The cost of one pack is a clear indication of this and the next message you get from one of your batteries may be at the cost of your house.

With that said, IF you charged them together as a large 5S pack you'd still want a balancer to read each of the 10S cells and balance accordingly. What you have described is not doing this. Discharge together is one large 5S pack, CHARGING together is a 5S pack to charge BUT a 10S pack to balance and it doesn't sound like that is what you are balancing.

Be safe and charge with security = charge them individually and fly them as one = good times, safe house and long life from your batteries.
Once you try steak, is hard to go back to hotdogs.
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06-02-2011 09:47 PM  9 years ago
swoop_g

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Lake Charles, LA USA

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That adapter makes two 5s batteries into one 10s battery. It is in series.
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06-02-2011 09:51 PM  9 years ago
RCSavager

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Topeka, KS

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You're right and I was wrong on the adapter as one is turned 180 and confused me. The same applies, he needs to balance EACH cell individually. Anything less is simply dangerous. Discharging 2 x 5S packs in a heli is common, charging 2 x 5S cells and not balancing as a 10S setup is flaunting with danger. Other than my statements of the adapter usage IN the heli, everything else I said was accurate. Note that I've run 2 x 6S in my last 3 birds as well as the new TDR on the way as well as have owned the 1010C charger he's using. 2 x 5S doesn't equal 10S in the charging plugs. He will need a 2 x 5S into 10S adapter to insure safety to charge them like he wants. Otherwise it's a crapshoot whether one cell goes down while charging and sets his house of fire. Is it worth it?

Charge them individually and use them together = a safe house, happy wife/family and proper usage without the proper 2 x 5S into 10S balancing adapter.
Once you try steak, is hard to go back to hotdogs.
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06-02-2011 10:17 PM  9 years ago
swoop_g

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Lake Charles, LA USA

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yep, well put.
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06-03-2011 01:17 AM  9 years ago
MikeM

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Austin, Texas - USA

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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › lipos charge and balance in SERIES or PARALELL???i say SERIES
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