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Radio - Servo - Gyro - Gov - Batt > How to Charge and Balance 2 3s1p Packs as a Single 6s1p
 
 
rbgrn
Heliman
Location: Chicago, IL

I recently built a balance lead that can balance two 3s packs as a single 6s. Combined with a serial power lead, I'm now charging and balancing two 3s1p packs simultaneously. Here's the tutorial - How to Charge and Balance 2 3s1p Packs as a Single 6s1p

Enjoy!

Robert Green - http://www.rbgrn.net/
07-16-2008 04:29 AM
 
 
Drunk Monk
rrProfessor
Location: Preston, UK

Very good article, I'll try that tonight. I did try at weekend but I couldn't get my balancer to see more than 5 cells but I now know where I went wrong, Thanks


Stephen

I only open my mouth to change feet.....
07-16-2008 08:55 AM
 
 
Dr Lodge
Elite Veteran
Location: Guildford, Surrey - UK

I've done that with 2 of my old 3s 5Ah LiPos which I now use as a battery pack for my Starter Motor - used in parallel (10Ah) but its easier to charge in series. Quite a few people have difficulty in getting their head round just how to do this, thanks for your web article.

I also have a very natty lead which allows my to charge 2x3s LiPs in parallel, will try and get a photo uploaded to show how that is done.

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Sorry for the long note, I didn't have time to write a short one.
07-16-2008 09:45 AM
 
 
AAKEE
Senior Heliman
Location: Boden, Sweden

I've done this for 1½ year, using a E-station BC6.

If You have the battery packs drawn to the same level (i.e the used milliampheres) you will charge the 2 packs as quickly as charging one pack.

If there is a difference in the discharge it can make the charging take a lot more time. This is due to the fact that when the first cell of the 6 comes close to 4.20volts the charging current will go down rahter much.
If, fore example, the difference is 500mah, the first batteri pack will reach 4.20volts/cell and the second will still have 500mah to full...then it will probably be the limit of the balancers current flow(200mah in my BC6). This will make it take about further 2½ hour (500/200) to complete the charging cycle.

So: Try to fly the lipos to the same level. I go strictly on the timer, and if I know i flew harder(more 3D) with some lipo packs, then I charge them together. This makes it to keep about (or less then) one hour to charge 2*3s.
I check the voltage level on the packs, I press the button on the charger to se voltage immediatly after starting the charging, then I can se the 'resting voltage' of each cell...if the difference is to much (about 0,1volt) then it'll take more time to charge that combo.

Hope this can bring you some extra joy to the 2*3s-charging :-)
07-16-2008 11:02 AM
 
 
Dr Lodge
Elite Veteran
Location: Guildford, Surrey - UK

How to parallel charge and balance 2 3s1p Packs (as a 3s2p)

This is my setup, works a treat:



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Sorry for the long note, I didn't have time to write a short one.
07-24-2008 10:42 PM
 
 
"Cam"
Veteran
Location: Japan

Here's what I've just done

http://www.runryder.com/helicopter/t455680p1/
08-29-2008 04:59 AM
 
 
duceduc
Senior Heliman
Location: Lat:34, Long: -118

Charging (3) 3S packs

This is how I charge my (3) 3S packs.



Do It! Do It™ - Duc S
08-29-2008 05:11 AM
 
 
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Radio - Servo - Gyro - Gov - Batt > How to Charge and Balance 2 3s1p Packs as a Single 6s1p
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