RE: A123Racing Battery Questions  
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RE: A123Racing Battery Questions - 1/19/2007 10:43:27 PM   
dick Hanson



Posts: 9734
Joined: 12/12/2001
From: slc, UT, USA
Status: online 		After looking around -I find no cells in two pack or loose 4 cells etc.. Local DeWalt wants $185 for the pack (10)
is anyone except 123 Racing selling em?
ther has got to be a better deal than 20 bucks a pop.

_____________________________

I am watching you ----
Libby

(in reply to RC Accessory)
       Post #: 126

RE: A123Racing Battery Questions - 1/20/2007 1:08:14 AM   
everydayflyer



Posts: 854
Joined: 8/21/2005
From: Buchanan, GA, USA
Status: online 		A premade 2 cell will cost you $50 plus.

http://www.maxamps.com/

has them and so does

http://www.tanicpacks.com/catalog/index.php?cPath=95&osCsid=0bf2bedb48c41d07ddcf19cdbb0bd8b4

as well as A123 Racing of course.


< Message edited by everydayflyer -- 1/20/2007 1:13:12 AM >

(in reply to dick Hanson)
       Post #: 127

RE: A123Racing Battery Questions - 1/23/2007 12:30:49 PM   
stemur1


 

Posts: 18
Joined: 11/22/2005
From: Frenchtown, NJ, USA
Status: offline 		Has anyone used a large pack as I stated in my earlier post? I would like to buy the packs soon but I just wanna be sure on what I need to buy with them. Steve

(in reply to stemur1)
       Post #: 128

RE: A123Racing Battery Questions - 1/23/2007 3:49:44 PM   
everydayflyer



Posts: 854
Joined: 8/21/2005
From: Buchanan, GA, USA
Status: online 		There is only one balancer that I am aware of that can balance a 12S battery and that would be the Hyperion LBA 10 .You would need two of theses and their series harness.

Yes many are using 12 cell or more in series and many are using 2P and greater. There was a post on RC Groups of a pair of 6P8S packs which were going to be used as a 6P16S.

Most charging large packs are using Variable volts / amps power supplies such as ones capable of 0-50 V and 0-20A

I use the Hyperion LBA6 1-5S with my 3 and 4S A123 packs and it works great.
I also use my Thunder Power 210V Balancer which when in combo with my TP-1010C charger with Rev. 2.1A firmware provides me with indivual cell voltages.


Creaters of the mega pack

http://www.tanicpacks.com/catalog/product_info.php?cPath=102&products_id=712

Mega A123 packs on RC Groups

http://www.rcgroups.com/forums/showthread.php?t=623723


Charles

< Message edited by everydayflyer -- 1/23/2007 4:22:39 PM >

(in reply to stemur1)
       Post #: 129

RE: A123Racing Battery Questions - 1/23/2007 7:29:03 PM   
RC Accessory



Posts: 579
Joined: 12/7/2001
From: Tampa, FL, USA
Status: offline 		The e-Station PB-6 Dual Link balancer can do 12S packs, 2 linked together. Many people over on helifreak.com use this setup with li-poly and A123. Also, the e-Station balancers support the Li-Fe technology while many do not because of the LVC and end voltage termination.




RC Accessory, Inc.
Auth US Bantam Importer

(in reply to everydayflyer)
       Post #: 130

RE: A123Racing Battery Questions - 1/23/2007 9:02:00 PM   
stemur1


 

Posts: 18
Joined: 11/22/2005
From: Frenchtown, NJ, USA
Status: offline 		After speaking with some R/C guys from work, battery/ power systems designers from work, and the guys posting in the A123 support forum, i'm gonna go with the HiMaxx 6332-230 brushless/ Phoenix 85HV ESC, and i'm gonna try a 19x10E APC prop. A 12s2p LiIon A123 pack made by myself and i'll use one of the rectifiers from my work to charge the packs(1200w 39-56v@25A). I'm hopefully going with two e-station PB6 dual-link balancers to balance the packs. I got a GREAT price on the motor/esc/prop combo so I couldn't pass them up. I should fall in at around 9 min flight times based on some calcs we did and I should be looking at approx 115w per lb. I'm gonna build it and see what happens. Let me know what you think.

(in reply to RC Accessory)
       Post #: 131

RE: A123Racing Battery Questions - 1/25/2007 5:45:07 AM   
aussiebuddha


 

Posts: 9
Joined: 1/17/2006
From: SydneySydney, AUSTRALIA
Status: offline 		Hi Brian.

Can you please tell me what balancing cable/taps does a123 use in their packs.
I'm building my own, and I'd like to keep it as standard as possible.

Thanks

(in reply to A123 Racing)
       Post #: 132

RE: A123Racing Battery Questions - 1/29/2007 2:34:40 AM   
OCR99


 

Posts: 43
Joined: 7/13/2004
From: PLOVER, WI, USA
Status: offline 		WHAT IS THE NAME OF COMPANY THAT MAKES 123 CELLS?
RICK

(in reply to aussiebuddha)
       Post #: 133

RE: A123Racing Battery Questions - 1/29/2007 3:02:17 AM   
aussiebuddha


 

Posts: 9
Joined: 1/17/2006
From: SydneySydney, AUSTRALIA
Status: offline 		a123 racing?

I'm actually looking to find out which taps are better to install in my new packs.
I'm kinda sick of all that rubbish about adapter and I wanted to decide which ones to use.

(in reply to OCR99)
       Post #: 134

RE: A123Racing Battery Questions - 2/5/2007 6:06:41 PM   
Red Scholefield



Posts: 4624
Joined: 12/8/2001
From: Newberry, FL, USA
Status: online
quote:

ORIGINAL: rltucker

This message is for Red Scholefield.

In your post of December 17 you mentioned harvesting A123 cells from DeWalt 36 Volt packs. Do those packs have only 10 cells in series, or 20 cells in a 10S2P arrangement?

I'm wondering how you get 4S2P packs for only $80. The lowest price for the 36 Volt packs that I can find is at Amazon.com where the price is $164.99 with free shipping.

Bob Tucker


Buying DeWalt packs on e-bay for around $100, this gives you a $10/cell price - 8 cells = $80 for 4S2P pack.

DeWalt packs have 10 cells in series - take the four from each end, fold them over and you have two sticks side by side - no soldering between cell required. This leaves you with two individual cells with tabs - I have made up 4S packs with these using MEC power tube construction. Again no soldering required except the power and balancing leads.


_____________________________

Red S. AMA 951
R/C Battery Clinic
www.rcbatteryclinic.com

(in reply to rltucker)
       Post #: 135

RE: A123Racing Battery Questions - 2/12/2007 11:44:37 PM   
makatron


 

Posts: 272
Joined: 9/28/2006
From: Santo Domingo, DOMINICAN REPUBLIC
Status: offline 		what about us heli pilots?? when will these packs come in smaller version so helis can handle the weight??

im flying .30 .50 and .60 helis and i bet these babies will be a blast in rc heli hobby for sure

_____________________________

I fly................therefore i exist
The more you Crash........more you wanna mode your bird

(in reply to Red Scholefield)
       Post #: 136

RE: A123Racing Battery Questions - 2/13/2007 12:19:02 AM   
FlyBoyKB


 

Posts: 9
Joined: 10/14/2003
From: Cincinnati, OH, USA
Status: offline 		Makatron -

The A123 cells are already being used very successfully in electric heli's my friends are flying. For example they are using 4S1P in the Trex 450's and 10S1P in Swifts. They are a little heavier than the best lipo's but the heli's carry the weight quite nicely.

kb

< Message edited by FlyBoyKB -- 2/13/2007 12:20:17 AM >

(in reply to makatron)
       Post #: 137

RE: A123Racing Battery Questions - 2/13/2007 12:46:24 AM   
Red Scholefield



Posts: 4624
Joined: 12/8/2001
From: Newberry, FL, USA
Status: online 		A 4S A123 weighs the same as a 3S4400 Lipo pack, about 11 oz. And you can probably will it to your grandchildren if the ones I've been flying are any indication. Seriously - 75 cycles and still going strong. Discharge on the order of 35 amps at full throttle.

_____________________________

Red S. AMA 951
R/C Battery Clinic
www.rcbatteryclinic.com

(in reply to FlyBoyKB)
       Post #: 138

RE: A123Racing Battery Questions - 2/13/2007 12:53:37 AM   
makatron


 

Posts: 272
Joined: 9/28/2006
From: Santo Domingo, DOMINICAN REPUBLIC
Status: offline 		which pack shall i buy for my t-rex 450 then?? and what about smaller helis?

_____________________________

I fly................therefore i exist
The more you Crash........more you wanna mode your bird

(in reply to Red Scholefield)
       Post #: 139

RE: A123Racing Battery Questions - 2/13/2007 1:01:52 AM   
Red Scholefield



Posts: 4624
Joined: 12/8/2001
From: Newberry, FL, USA
Status: online
quote:

ORIGINAL: makatron

which pack shall i buy for my t-rex 450 then?? and what about smaller helis?


Therein lies the problem. A123 does not offer a 4S pack. Most of us in aircraft are buying DeWalt drill packs and making our own, or having them made by a friend that has some experience in removing the cells and making up a pack with balancing connector (for FMA Cellpro). If you are at all handy with a soldering iron it is not nuclear science. You just have to be careful in removing the cell pack. Removing the screws is a bit tricky unless you have security bits available from Harbor Freight, even with them you have to be careful to get the right one to avoid stripping the screw heads. Others have simply cut the screws at the joint of the pack with a Dremel too.

Using the DeWalt salvaged cells you end up at about $40 per pack plus whatever the connectors cost.

_____________________________

Red S. AMA 951
R/C Battery Clinic
www.rcbatteryclinic.com

(in reply to makatron)