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HelicopterMain Discussion › parallel charging question
02-16-2011 10:22 AM  6 years agoPost 1
j wharnsby

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england

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I currently charge my 6s 5000 mah turnigy packs one at a time at 1c with an icharger. If I parallel charge four of these packs at 1c I should charge at 20 amps but do I set the capacity to 5000 mah or 20000 mah

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02-16-2011 10:40 AM  6 years agoPost 2
swoop_g

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Lake Charles, LA USA

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That is how you set capacity, by the amps. So 20 amps would charge 4 5000mAh packs at 1C.

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02-16-2011 12:43 PM  6 years agoPost 3
helismash

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Gloversville, NY -​Fulton

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+1 it just adds up.

Hey, Who put the ground there!
T-Rex 500/T-Rex 600N FBL/T-Rex 600E PRO/T-Rex 700N/T-Rex 700FBL

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02-16-2011 01:08 PM  6 years agoPost 4
j wharnsby

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england

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Its just on my icharger you can set the charge amps and capacity independantly

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02-16-2011 02:37 PM  6 years agoPost 5
burtondude

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Edmonton, Alberta,​Canada

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20000 is 1c 5000 would be 4c

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02-16-2011 05:07 PM  6 years agoPost 6
Rotowerkz

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Windham, NH

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Remember, though that your iCharger's rated output dictates the effective charging current you can push. If your iCharger is rated at 400 W (as an example), and you are charging a 6S load, you need to do the math:

400W / (6 * 4.2 ) = 15.8 A

This means that you can't source more than 15.8A out of this charger. If you are parallel charging, just divide this number by the number of packs to get your effective single-pack charge current. So, with 2 packs:

15.8/2 = 7.9A per pack.

For a 5000 mAh pack, this would be

7.9A/5 = 1.58C

1.58C would be your effective charge rate for each pack.

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02-16-2011 05:19 PM  6 years agoPost 7
GyroFreak

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Orlando Florida​...28N 81W

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I didn't think parallel charging was allowed. Do you use sepreate balancers on each pack while charging ?

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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02-16-2011 05:29 PM  6 years agoPost 8
red_z06

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Dumont, NJ

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If you have healthy cells, you can parallel charge with parallel balancer cable adapter made.

However, an imbalance on a 2000mah pack that would take 5min to balance, would take 50min on 4x 5000mah or 20Ah pack. This will effectively render the internal balancer useless. TP 205v or 210v has higher balancing (discharge) rate, but even that will struggle to keep up.

You can put a balancer on each pack separately to increase the balancing rate somewhat.

www.JustinJee.com

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02-16-2011 05:53 PM  6 years agoPost 9
Rotowerkz

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Windham, NH

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I use a single balancer circuit with well-matched packs (i.e. ones that have identical discharge profiles, like those on my 12S TREX 600). ProgressiveRC sells the balancing adapters that allow you to balance multiple packs as one. I don't recommend it for mismatched packs.

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