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Anyone make a 6-cell, 4A charger?

Old 09-24-2006, 05:21 AM
  #1  
Lee Jay
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Default Anyone make a 6-cell, 4A charger?

I'm interested in a charger that charges all the cells individually, like the FMA Cellpro or the Commonsense RC charger. But I'm thinking of getting 3S 3,850mAh Lipos from CSRC so 1C is about 4A. I'll be using 2 of them in my planes so I'd like to charge all 6 cells at the same time. The Cellpro and CSRC charger are only 4-cells and the Cellpro is 3A while the CSRC charger is only 2A. It's bad enough that I'll have to wait an hour for a charge (I'm used to charging RC2400s at 5A - less than 1/2 hour per charge) so I definitely don't want to go longer.

Any ideas?

Lee Jay
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Old 09-24-2006, 01:55 PM
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flypaper 2
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The FMA Balance Pro HD should do the trick. 6 cells. 10 amps.
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Old 09-24-2006, 03:30 PM
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Red Scholefield
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Take a look at the Xtrema. 10 cells @ 4A. They expect to have add on balancer shortly.
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Old 09-24-2006, 03:58 PM
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Lee Jay
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I was under the impression that each of these used balancing networks instead of separate charge controllers for each cell. I'm not sure I trust the balancing networks anywhere near as much as I do the separate-cell approach.

If I want to charge a 3850 and a 2100 on either of these chargers at the same time, could I? I know I could charge a 2S 3850 and a 2S 2100 on the Cellpro or the CSRC charger at the same time since they treat every cell as a separate battery (of course, I'd have to make the appropriate connector).

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Old 09-24-2006, 04:20 PM
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flypaper 2
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The balance Pro works the same as the cell pro, just handles more batts at higher amp rate.
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Old 09-24-2006, 04:34 PM
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Lee Jay
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Originally Posted by flypaper 2 View Post
The balance Pro works the same as the cell pro, just handles more batts at higher amp rate.
Really? Since it doesn't have the 4 separate displays, I assumed it didn't.

But now that I look more carefully, I see:

"An advanced feature of the BalancePro HD 6s charger is that it can be connected to a Windows based P.C. Using the BalancePro HD 6s Viewer Software, it is possible to see all parameters of charging, including individual cell voltages, charge current, capacity put back into the pack during the charge process, etc. "

And this:

" FMA’s Safe Charge Connector is a key part of the system. It enables the charger to monitor individual cells and independently charge each cell to its optimum level."

However, I'm sure the charge current is the same for all cells. That seems okay.

It also has this 20 minute 3C capability (reduced to 2.5C for 3850mAh packs because of the current limit of 10A). Is this cycle special in some way or does it just clobber the batteries?

This could be the answer I'm looking for because it could charge 2 3850s simultaneously in half an hour!

Lee Jay
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Old 09-24-2006, 04:50 PM
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flypaper 2
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I'm charging 5S 3 AH. Li-ion batts at 2 C and charging in half an hr. with no problems. no noticeable heat after charge. More than happy with the charger. You can watch the voltage gradually come up on each cell on the computer screen. You can also make a printout too so you can compare the batt. at,say, six months later to get a comparison in performance.
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Old 09-24-2006, 04:58 PM
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Lee Jay
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Originally Posted by flypaper 2 View Post
I'm charging 5S 3 AH. Li-ion batts at 2 C and charging in half an hr. with no problems. no noticeable heat after charge. More than happy with the charger. You can watch the voltage gradually come up on each cell on the computer screen. You can also make a printout too so you can compare the batt. at,say, six months later to get a comparison in performance.
Okay, fair enough. Thanks for the info.

Now I just have to decide exactly what to do. I think if I had to do it right now, I'd get the CSRC 3850 10Cs, the BalancePro and build up my own connectors to the charger.

I'm thinking of repowering my fleet which is currently powered by Astro Cobalt DC motors and Sanyo RC2400s with Brushless systems (already have two Aveox motors - 27/39/1.5 and 36/30/2 for my biplane and heli) and Lipos. I'm thinking of replacing my 05FAI directs with Neu 1107/1.5s with 3.3:1 gearboxes for my twin powered by Castle Creations Phoenix 45s.

So the 3S 3850s would replace 7C RC2400s.
The 27/39/1.5 with 3.7:1 gearbox on 6S would replace the Astro 40FAI direct on 21 cells.
The Aveox SH96 I already have will replace my Astro 205s.
The 36/30/1.5 is not replacing anything.
The New 1107/1.5 with 3.3:1 on 3s each would replace the Astro 05FAIs.
I'd add the Castle Phoenix 45s for my twin which currently runs both motors in series with one control.
And the Balance pro would replace my DC-DC constant Amp Astro charger.

Sound's like a plan.

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Old 09-24-2006, 05:13 PM
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flypaper 2
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Lee:
They also make a wired up node connector to hook up to your batts. and plugs into the side of the charger. Also an adapter for the smaller batts.of different makes. I charge my TP 1320s with it in 1/2 an hr. too. Fits Thunder power and Poliquest, 2-3-and 4 cell. I don't work for them, just a satisfied customer.
Gord
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Old 09-24-2006, 05:22 PM
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Lee Jay
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Originally Posted by flypaper 2 View Post
Lee:
They also make a wired up node connector to hook up to your batts. and plugs into the side of the charger. Also an adapter for the smaller batts.of different makes. I charge my TP 1320s with it in 1/2 an hr. too. Fits Thunder power and Poliquest, 2-3-and 4 cell. I don't work for them, just a satisfied customer.
Gord
This thing?
http://fmadirect.com/Detail.htm?item=2126&section=38

I'm not sure what charge/balance connectors the CSRC batteries use.

Does that thing allow you to hook multiple packs up simultaneously?

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Old 09-24-2006, 09:08 PM
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flypaper 2
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Mine is the same one except it will only do up to four cells. I doubt if it will do more than one cell at a time. Red Scholefield could answer better than I can when it gets into the electronics.
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Old 09-25-2006, 06:58 PM
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Unbalanced prop
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Originally Posted by Lee Jay View Post

Does that thing allow you to hook multiple packs up simultaneously?
Nope. You can only charge one pack at a time.

Doug
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Old 09-25-2006, 08:02 PM
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Lee Jay
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Originally Posted by Unbalanced prop View Post
Nope. You can only charge one pack at a time.

Doug
Thanks. So I'll make my own harness for that. No big deal and it will probably cost a lot less!

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Old 09-26-2006, 03:33 AM
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Originally Posted by Lee Jay View Post
Thanks. So I'll make my own harness for that. No big deal and it will probably cost a lot less!
Yep, do it yourself...........I have lots of adapters for all my different packs and chargers\balancers.

Doug
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Old 11-16-2006, 05:09 PM
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Check out the Xtrema at Hurricane Flight Systems. They will also have the new programming table in stock next week.

www.flyhurricane.com
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