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› Icharger 206B & Parallel Charge rates
02-07-2010 06:23 PM  8 years agoPost 1
Flyinrazrback

rrVeteran

Fort Smith, AR

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I have an Icharger 206B and the Icharger P350 power supply. I usually charge one pack at a time, but have the parallel adapter to charge more than one at once. My question is, I have 6s1p 5000mah packs, how many of these can I charge in parallel at once at 1C with my charger/power supply? I have 4 packs and would like to be able to charge them all at once, but not sure if my setup will do that.

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02-07-2010 09:13 PM  8 years agoPost 2
TJinGuy

rrProfessor

Socorro, NM - USA

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Here read over this and come back with questions.
http://sites.google.com/site/tjingu...rallel-charging

- Chris

Team New Mexico
TJinTech

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02-07-2010 09:32 PM  8 years agoPost 3
Flyinrazrback

rrVeteran

Fort Smith, AR

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Ok, so essentially by charging 4 of my packs at once, I am charging a 6s 20000mah pack. So, in theory if I connect all them up I have a total of 20000mah, and 1C would be 20 Amps. But, will my charger and power supply charge at an actual 20A rate?

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02-07-2010 09:35 PM  8 years agoPost 4
TJinGuy

rrProfessor

Socorro, NM - USA

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Yep and now to the next article
http://sites.google.com/site/tjingu...ge-for-charging

- Chris

Team New Mexico
TJinTech

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02-07-2010 09:46 PM  8 years agoPost 5
Flyinrazrback

rrVeteran

Fort Smith, AR

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Thanks, looks like my setup will not charge 4x 6s1p 5000 packs at once, not at 1C at least. So, if I set up all 4 packs and charge at 20A, it will not be able to do the 1C, but it will be able to charge all 4 but will take longer, or would you suggest charging 2 at a time at 1C?

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02-07-2010 09:53 PM  8 years agoPost 6
TJinGuy

rrProfessor

Socorro, NM - USA

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That is up to you. It is often handy to charge all of them at once even if it is at less than 1C. If it were me I would charge 2 at a time a 1C, 10A, when I was at home. When I was in a hurry I would charge all 4 at once at the chargers max rate (about 12A). I would also set the setting for "Balance Speed" to Slow so it tops off the packs even with the higher charge rate. Check out the manual for more info on that.

- Chris

Team New Mexico
TJinTech

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02-07-2010 10:07 PM  8 years agoPost 7
Flyinrazrback

rrVeteran

Fort Smith, AR

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Thanks for the info!

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02-18-2010 05:42 PM  8 years agoPost 8
write2dgray

rrApprentice

Seattle, WA

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Nice job Chris! Your web pages there are VERY handy for answering all of the most common questions. Thanks again for your work in putting them up.

Cheers,
David

More wagging, less barking

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02-18-2010 09:39 PM  8 years agoPost 9
Justin Stuart (RIP)

rrMaster

Plano, Texas

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The iCharger 206B is really something, isn't it? I love mine.

I'm wondering if maybe it would be better when you want to charge 4 packs to go with a higher voltage power supply, like one that is at 24V? If you think about it, when doing 2S2P, the iCharger is having to make 25.2V out of whatever input voltage you give it. It probably works more efficiently if you give it a higher input voltage. I'm not sure what the max input voltage is for the 208B, but I imagine the closer you can get to that max input voltage, the more efficiently you can charge a 6s pack.

Avant RC
Scorpion Power Systems
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Kontronik Drives

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02-18-2010 10:16 PM  8 years agoPost 10
TJinGuy

rrProfessor

Socorro, NM - USA

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I recently did a little experiment to see how much of a loss was involved when charging a 6s pack vs a 3s pack off a 12V source. I charged a pair of 6s packs at 5A and then 3 3s packs at 10A (same wattage output from charger) while using a watt meter on the 120V input to my power supply. Granted not the most precise experiment but and extremely easy one to do. I did this for both my iCharger 208B and my friends Cellpro 10s and the results were very surprising.

iCharger with 12.5V input
3s, 10A = 147W
6s, 5A = 146W

Cellpro 10S with 12.5V input
3s, 10A = 170W
6s, 5A = 164W

It would appear that there is virtually no loss when converting 12V to 24V in order to charge a 6s pack off a 12V source. I also raised the input voltage as much as I could on the 6s pack and it did drop the wattage slightly but only down to 140W for a 17.2V source.

As a note that experiment totally contradicts all I have ever been told on the subject. So my new suggestion is to just charge at 12V unless you need a higher input for max output. Then charge at that voltage.

Also note that the iCharger is about 15% more efficient than the Cellpro

- Chris

Team New Mexico
TJinTech

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