Charging A123 Batteries  
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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> Charging A123 Batteries
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Charging A123 Batteries - 4/10/2008 5:36:33 PM   
MR G



Posts: 523
Joined: 12/20/2002
From: San Antonio, TX, USA
Status: online 		OK, I am ready to take the plunge into A123 batteries!!
I have attached a pic of my proposed A123 setup. I will be using a 4s Cellpro charger to charge the batteries.

My batteries will all have two outputs, 2 wire/JR plug to the switch and a 3 wire balancing node plug

My question is whether or not I must unplug the batteries before charging? especially on the RX.

Thanks for your advice and knowledge

MR G



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       Post #: 1

RE: Charging A123 Batteries - 4/10/2008 6:28:22 PM   
OldRookie


 

Posts: 576
Joined: 12/11/2001
From: Prior Lake, MN, USA
Status: offline 		Mr G,

What are you going to do with the balancing charge node ends?
Are they going to be loose inside of the plane, or are you going to access them from the outside of the plane?
I am setting up the same as you except I am going to run the ignition from one of the A123 2300 cells.
What program are you using for your diagram? I see this type of illustration used by several RCU members.

Greg

(in reply to MR G)
       Post #: 2

RE: Charging A123 Batteries - 4/10/2008 7:08:57 PM   
MR G



Posts: 523
Joined: 12/20/2002
From: San Antonio, TX, USA
Status: online 		OldRookie,

I used MSPaint.exe to make my drawing and save as JPEG file.

The balancing charge nodes will be strapped down with velcro to keep from flopping allover while flying.
These are the nodes I will be charging thru, I will have to open the canopy to perform the charge.

I usually shrink wrap the connections to the swith to prevent accidental disconnect due to vibration. Which leads me to my question. Can I charge the batts thru the charge nodes without disconnecting from the charge switch?

MR G

_____________________________

Take-offs are optional...
Landings are mandatory!

(in reply to OldRookie)
       Post #: 3

RE: Charging A123 Batteries - 4/11/2008 2:51:22 AM   
Panzlflyer



Posts: 1937
Joined: 2/28/2002
From: Goldsboro, NC, USA
Status: offline 		yes, I do it all the time as long as there is no 3 wires going to the reciever youre fine.
I make my packs up with a JR lead and adapter from the Cellpro to JR.
On ignition I balance charge thru the JR charge switch, on the reciever packs either use a Ernest charge jack or pull the canopy.

(in reply to MR G)
       Post #: 4

RE: Charging A123 Batteries - 4/11/2008 1:55:39 PM   
BocaBen


 

Posts: 160
Joined: 4/12/2002
From: Boca Raton, FL, USA
Status: offline 		I wire my A123 batteries with 2 separate pigtails using JR connnectors.
Brown is the negative, Orange is wired in the middle of the 2 cells (3.3 V) and the red is the positive (6.6V)
I remove the connectors from the plastic housing and solder them as I had corrosion and increased ohmic resistance in there.
I use 2 JR Heavy Duty switch, and I cut the orange wire going between the switch to the receiver (you don't want to feed 3.3V in there!)
I charge and check the battery normally through the switch charging jack using my CellPro charger.
When the charge is done, I plug something in the switch charging jack to remember that I did indeed charged this battery. This is to avoid going to the field with a model which I forgot to charge.

(in reply to Panzlflyer)
       Post #: 5

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