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Old Jan 30, 2011, 11:33 AM
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United States, CA, Rocklin
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Charging 6 4s 3300 in parallel with the Icharger 206b

hello
im verry new to all this electric chargers and power supplys and I have been reading through the threads on the Icharger 206b and the powerlab8 learned a lot in the past few days but cant figer out what charger would work best for what I want it to do I have narowed it down to two chargers so hear is what I want to do

I have 6 nano techs 4s 3300 I want to charge all of them in parallel at 2c or maybe 3c my qustion is will the I charger 206b and the 350 PS handle this and about how long will it take to charge all 6 batteries

or would I be better off with a powerlab8 and two power supplys at 24v and 94amps


Thanks Tim
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Old Jan 30, 2011, 12:07 PM
TJin(Guy + Tech)
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Originally Posted by rcpilot_971 View Post
hello
im verry new to all this electric chargers and power supplys and I have been reading through the threads on the Icharger 206b and the powerlab8 learned a lot in the past few days but cant figer out what charger would work best for what I want it to do I have narowed it down to two chargers so hear is what I want to do

I have 6 nano techs 4s 3300 I want to charge all of them in parallel at 2c or maybe 3c my qustion is will the I charger 206b and the 350 PS handle this and about how long will it take to charge all 6 batteries

or would I be better off with a powerlab8 and two power supplys at 24v and 94amps


Thanks Tim
Sounds like you have read many pieces of info and are having trouble putting it together. To answer your first question, some math is required.

6(4s * 2C) = max wattage needed
6(16.8V * 2(3.3)) = 665W
6(16.8V * 3(3.3)) = 1000W

That is now many watts you would need but you also have to take the maximum number of amps required into account.

6*2(3.3) = 40A
6*3(3.3) = 60A

So you can see that there is no charger made today that will charge 6x 3300 4s packs at 3C but there is one that will do them at 2C, the PL8. Actually there is another but it would require you to split the packs up into 2 sets of 3.

As for your second, that is a function of 2C and 3C charge rates, estimated to be 35min and 25min respectively.
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Old Jan 30, 2011, 01:00 PM
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Originally Posted by tjinguy View Post
Sounds like you have read many pieces of info and are having trouble putting it together. To answer your first question, some math is required.

6(4s * 2C) = max wattage needed
6(16.8V * 2(3.3)) = 665W
6(16.8V * 3(3.3)) = 1000W

That is now many watts you would need but you also have to take the maximum number of amps required into account.

6*2(3.3) = 40A
6*3(3.3) = 60A

So you can see that there is no charger made today that will charge 6x 3300 4s packs at 3C but there is one that will do them at 2C, the PL8. Actually there is another but it would require you to split the packs up into 2 sets of 3.

As for your second, that is a function of 2C and 3C charge rates, estimated to be 35min and 25min respectively.
man this stuff is confusing
so how maney 4s 3300 could I charge @ 3c with Icharger and power supply and how maney with the powerlab8 and will the lowerlab do it faster than the I charger 206

Thanks Tim
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Old Jan 30, 2011, 01:07 PM
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2 is the max then at 3C for the 206B.

But make a blok of 2 by 3, 8S3P and the PL8 will do 4C
It's al in the numbers.

DB,
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Old Jan 30, 2011, 02:40 PM
TJin(Guy + Tech)
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But make a blok of 2 by 3, 8S3P and the PL8 will do 4C
That is not helpful. Please don't introduce things such as this when the OP is trying to learn the basics.

Quote:
man this stuff is confusing
so how maney 4s 3300 could I charge @ 3c with Icharger and power supply and how maney with the powerlab8 and will the lowerlab do it faster than the I charger 206
The 206B is rated at 300W or 20A max. So lets figure out what the max charge rate it for 4S on a 300W charger.

300W / 16.8V = 17.8A

That is lower than the max 20A limit, so you can use the whole wattage output. Now divide by 3.3A to find out what C you can charge at

17.8A / 3.3A = 5.4C

That means you can charge a single pack at 5.4C or divide it up by parallel charging. So to answer your question though, you can almost charge 2 4s 3300 packs at 3C (actually 2.7C each) on a 206B.
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Old Jan 30, 2011, 04:39 PM
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Time wise would that be 20min at 3c and 30min at 2c
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Old Jan 30, 2011, 04:42 PM
TJin(Guy + Tech)
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Originally Posted by rcpilot_971 View Post
Time wise would that be 20min at 3c and 30min at 2c
It is more like 25min and 35min for 80% discharged packs, though it varies depending on how far you discharge the packs and is influenced buy both the charger and settings.
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Old Jan 30, 2011, 09:27 PM
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Originally Posted by tjinguy View Post
It is more like 25min and 35min for 80% discharged packs, though it varies depending on how far you discharge the packs and is influenced buy both the charger and settings.
ok thanks
I think im going to order the icharger and 350 power supply


Thanks Tim
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Old Jan 31, 2011, 09:17 AM
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Originally Posted by rcpilot_971 View Post
ok thanks
I think im going to order the icharger and 350 power supply


Thanks Tim
Get it from David at progressive rc and you wont regret it...happy charging/flying.


Ben
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Old Jan 31, 2011, 09:37 AM
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Get it from David at progressive rc and you wont regret it...happy charging/flying.


Ben
Yeh that is where I was plannig on buying it from
thanks
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Old Jan 31, 2011, 10:10 AM
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One thing is you can have 1000W capable charger but if power supply can only provide 12V the max amps will be limited to 14A or so on 4S. Am I right?
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Old Jan 31, 2011, 11:37 AM
TJin(Guy + Tech)
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One thing is you can have 1000W capable charger but if power supply can only provide 12V the max amps will be limited to 14A or so on 4S. Am I right?
That is dependent on the charger and power supply. The big iChargers can output 500W off 12V, so that would give you a full 30A on 4s but it would require a 12V 50A power supply. The PL8 will do almost 600W on 12V but would require 60A of 12V input.
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Old Jan 31, 2011, 08:22 PM
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Originally Posted by tjinguy View Post
That is dependent on the charger and power supply. The big iChargers can output 500W off 12V, so that would give you a full 30A on 4s but it would require a 12V 50A power supply. The PL8 will do almost 600W on 12V but would require 60A of 12V input.
so with the Icharger and the 350 watt power supply would I be able to get 20 amps
what I would like to be able to do is charge 2 4s 3300 in parallel @ 3c would this = 19 amps out of the Icharger 206b ? or would I be better off with a powerlab8 and a 24v 94amp power supply


Thanks Tim
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Old Jan 31, 2011, 08:43 PM
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the amps that these chargers are putting out these days are scary, in a good way!
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Old Jan 31, 2011, 09:03 PM
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Originally Posted by rcpilot_971 View Post
so with the Icharger and the 350 watt power supply would I be able to get 20 amps
what I would like to be able to do is charge 2 4s 3300 in parallel @ 3c would this = 19 amps out of the Icharger 206b ? or would I be better off with a powerlab8 and a 24v 94amp power supply


Thanks Tim
I own iCharger 206b. The max amps I can get out of 12V supply (deep cycle battery or PC power supply) charging 4S is 14-15A. You can get up to 20A if power supply can provide more than 12V.
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