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HomeRC & PowerAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › parallel charging?
08-27-2013 05:42 AM  5 years agoPost 1
gearset

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Thunder Bay Ontario

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hey, I'm sure this has been posted before, but I'm new to this type of charging, what are your thoughts on it?
thankx.

Livin'............

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08-27-2013 05:58 AM  5 years agoPost 2
RogerRabbit62

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Thuerigen germany

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Perfect

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08-27-2013 12:04 PM  5 years agoPost 3
Darren Lee

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Woodstock, GA

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It's the only way to charge if you don't want to wait around all day.

Team Synergy / Rail Blades / Morgan Fuel

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08-27-2013 12:11 PM  5 years agoPost 4
moparherb

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Fulton, NY Syracuse Thunderbirds

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Been doing it for years........+1 on the not having to wait when you fly multiple packs

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08-27-2013 12:13 PM  5 years agoPost 5
DemetriusUSN

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Virginia Beach, Va USA

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I parallel charge all the time, 4-6, 6s 3300mah Skylipos for my Fusion 50 and it takes about 40min at 2c charge rate for 4 packs and close to an hour for alk six but I mainly only do 2 at a time and that's about 20 minutes or so.

Minicopter Diabolo 800, Minicopter Triabolo 700, Minicopter Diabolo 700, Minicopter Diabolo 600, Minicopter Diabolo 550, Goblin 770

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08-27-2013 03:02 PM  5 years agoPost 6
qraptor

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Illinois

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beeflyer,

What power supplies are you using? Are they connected in series to give you 24V?

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08-27-2013 03:17 PM  5 years agoPost 7
gearset

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Thunder Bay Ontario

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I'm using the e fuel 1200w 60 amp power supply and a hi tech 400w duel charger.

Livin'............

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08-27-2013 03:59 PM  5 years agoPost 8
Darren Lee

rrElite Veteran

Woodstock, GA

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What power supplies are you using? Are they connected in series to give you 24V?
HP model DPS-600PB. Yes, they are in series for 24V.

https://sites.google.com/site/tjing...-projects/HP47A
https://sites.google.com/site/tjing...cts/diy-24v-47a

Team Synergy / Rail Blades / Morgan Fuel

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08-27-2013 05:59 PM  5 years agoPost 9
qraptor

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Illinois

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Nice.

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08-27-2013 08:06 PM  5 years agoPost 10
RogerRabbit62

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Thuerigen germany

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i charge 6x 4s4000 inside 45 minutes at one charger.
you cant fly them that fast.

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08-27-2013 08:41 PM  5 years agoPost 11
BrainDrain_dx

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Wichita KS

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I hate parallel charging. I think it hides bad cells because they will be equalized with the good cells when you hook them up parallel and you might not notice a problem until its to late.

I have two, 2 port chargers and only charge as singles. Can't outfly this setup either and have a better idea of the health of each battery.

The difference is parallel charges each battery at 1-2c where straight charging you have to go 3c to keep up.

KDS Agile 7.2/5.5 Chase 360 - SkyHero Spyder/Spy/Little Spyder
Sponsored by my Visa

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08-27-2013 08:49 PM  5 years agoPost 12
DemetriusUSN

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Virginia Beach, Va USA

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BrianDrain_dx, very good point. I'm working another icharger 208, good point, thanks bro.

Minicopter Diabolo 800, Minicopter Triabolo 700, Minicopter Diabolo 700, Minicopter Diabolo 600, Minicopter Diabolo 550, Goblin 770

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08-27-2013 09:24 PM  5 years agoPost 13
qraptor

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Illinois

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The difference is parallel charges each battery at 1-2c where straight charging you have to go 3c to keep up.
And with our current LiPos, it should not be a big issue going with a 3C charge rate. Perhaps we will lose a little durability, but make up with a little improved safety.

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08-29-2013 10:19 PM  5 years agoPost 14
Two Left Thumbs

rrKey Veteran

Houston, Texas - USA

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I hate parallel charging. I think it hides bad cells because they will be equalized with the good cells when you hook them up parallel and you might not notice a problem until its to late.
Normally I charge in parallel with a PL8, and I'm fine with that. Recently I took two sets of lipos (4 6s packs, 3 3s packs) out of 12 months storage. Since they had been in storage so long, I thought it best to charge singly for the reason BrainDrain_dx mentioned.

Sure enough, two of the packs had problems. One of the 3s packs read 0.00v on 2 cells , and the PL8 rejected it immediately. One of the 6s packs had a low cell and the PL8 went into safety mode. I might not have known about that low cell if I had put all 4 of the 6s packs in parallel.

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08-29-2013 10:30 PM  5 years agoPost 15
JKos

rrProfessor

Redondo Beach, CA

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Parallel charging definitely masks certain issues. Poor cells, disconnected balance leads, etc. It doesn't take much to mask something either.

For example, I have four same brand and age 3S 1350 mAh LiPo packs. Two have one poor performing cell each. Put either or both of those packs with one (or more) good pack(s) and charger has no idea.

In fact, if I put the two bad packs in parallel, the charger doesn't detect it because they have different bad cell positions.

- John

RR rules!

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08-30-2013 01:34 AM  5 years agoPost 16
Ace Dude

rrProfessor

USA

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I'm not a fan of parallel charging either. Sure, it works, but I avoid it whenever possible.

Perhaps the day will come when chargers can individually monitor every individual cell in parallel, but until then parallel charging does present some additional for the reasons already stated.

  

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08-30-2013 02:16 AM  5 years agoPost 17
Retired2011

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Lee's Summit, MO

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Perhaps the day will come when chargers can individually monitor every individual cell in parallel
Seems like that would require a smart battery also, or at least a smart para-board. I only parallel charge 2S batts for my 130X, don't trust it on 6S.

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