SMALL - espritmodel.com SMALL - Telemetry SMALL - Radio
Reply
Thread Tools
Old Jun 28, 2006, 12:35 PM
Registered User
Joined Nov 2001
1,491 Posts
Discussion
How to balance a 10S pack with a 6S balancer.

I want to balance my 10S packs, but I only got a 6S balancer so this is how I thought this might work.

Connect the balancer to the first 6S and let them balance (discharge to lowest voltage in the pack), then connect to the last 5, 1 cell allready balanced and the 4 new one will balance after this one. I can't see why this shouldn't work?

Any thoughts?
Tom Viper is offline Find More Posts by Tom Viper
Reply With Quote
Sign up now
to remove ads between posts
Old Jun 28, 2006, 12:52 PM
"Each Day Is A Lesson"
diver don's Avatar
Goldsboro, NC
Joined May 2004
2,442 Posts
I understand what you are saying but how will you make the remaining 4 cells balance to the one cell already balanced.
I think you would need to have the 4 remaining cells have a higher voltage than the pre-balanced cell so the balancer would pull them down to the good cell.

Or get a Thunder Power 210.

Hope that makes sense.

DD
diver don is offline Find More Posts by diver don
Reply With Quote
Old Jun 28, 2006, 01:08 PM
"Fix it till it's Broken"
Irvine, CA
Joined Jun 2006
348 Posts
I would say to balancer the first 6 cells first. Then the last 6. Yes you are balancing 2 cell's twice. Once they are balanced balancer the first side this will ensure a well balanced pack. 2 cells will be balanced 3 times those 2 cells make sure that both sides are balanced to eachother. The thing is you need all 10S hooked up in a line split into 2 groups of 6S and 2 cells will be in both groups.
65535 is offline Find More Posts by 65535
Reply With Quote
Old Jun 28, 2006, 05:06 PM
Registered User
Joined Nov 2001
1,491 Posts
Thanks you your input. How about the possibilities to do this with a 5S balancer... any ideas?
Tom Viper is offline Find More Posts by Tom Viper
Reply With Quote
Old Jun 28, 2006, 05:44 PM
"Fix it till it's Broken"
Irvine, CA
Joined Jun 2006
348 Posts
Do 5S 5S seperately. then do a 2 cell balance of the middle cells. Then do 5 and 5 again.

Btw a new cahrger has come out that charges each cell individually through 4 chargers. You could use this to charge the cells 4 at a time then the last 2. It runs $65 so you could pick up 2-3 before you reach teh cost of a high end charger and a large balancer.
65535 is offline Find More Posts by 65535
Reply With Quote
Old Jun 28, 2006, 07:24 PM
A man with too many toys
United States
Joined Feb 2001
17,945 Posts
If you can afford an expensive 10s LiPo battery you just need to spend the money and get a TP210v. Anything else is going to be a pain and won’t work very well.

Put that 6-cell balancer up for sale and order a TP210v TODAY!


RC
RC Man is online now Find More Posts by RC Man
Reply With Quote
Old Jun 28, 2006, 10:04 PM
phillyphly
e-guru's Avatar
United States, PA, Philadelphia
Joined Sep 2005
1,223 Posts
Tom Viper:

I can't see anything wrong with your theory either... Just going to be a real pain to charge the second half of the battery to a higher voltage so the balancer drags them down to match the first half.

BTW, I like your style of thinking! Instead of spending the big bucks on over-hyped, expensive tool- make what 'ya got work for 'ya! That said, I have the over-hyped toys too because... well... I like gadgets
e-guru is offline Find More Posts by e-guru
Reply With Quote
Old Jun 28, 2006, 10:16 PM
Registered User
smurf's Avatar
Texas
Joined Jan 2005
1,433 Posts
Quote:
Originally Posted by Tom Viper
I want to balance my 10S packs, but I only got a 6S balancer so this is how I thought this might work.

Connect the balancer to the first 6S and let them balance (discharge to lowest voltage in the pack), then connect to the last 5, 1 cell allready balanced and the 4 new one will balance after this one. I can't see why this shouldn't work?

Any thoughts?

If you can check to see which cell is the lowest and balance that side first, the rest in the first balance should go to the lowest one, then do the other side which will include one that was already done. That should bring them down to all the same.....maybe
smurf is offline Find More Posts by smurf
Reply With Quote
Old Jun 28, 2006, 10:20 PM
Southern Pride
everydayflyer's Avatar
Haralson County GA. USA
Joined Oct 2004
34,834 Posts
http://www.rcgroups.com/forums/showp...60&postcount=5
everydayflyer is online now Find More Posts by everydayflyer
Reply With Quote
Old Jun 29, 2006, 08:33 AM
Registered User
Joined Nov 2001
1,491 Posts
How much can the cells differ? I have one bank that shows 4.17V, while the other 9 shows 4.18V, should this be a concern?
Tom Viper is offline Find More Posts by Tom Viper
Reply With Quote
Old Jun 29, 2006, 08:39 AM
phillyphly
e-guru's Avatar
United States, PA, Philadelphia
Joined Sep 2005
1,223 Posts
That is very close and not a concern...

When you say "bank" you mean single cell or paralleled cells right?
e-guru is offline Find More Posts by e-guru
Reply With Quote
Old Jun 29, 2006, 09:31 AM
"Fix it till it's Broken"
Irvine, CA
Joined Jun 2006
348 Posts
My idea was to use the 2 middle cells to balance the 2 banks of 6S since 2 of the cells are in both banks. But whatever works.
65535 is offline Find More Posts by 65535
Reply With Quote
Old Jun 29, 2006, 10:18 AM
Registered User
Joined Nov 2001
1,491 Posts
e-guru, yes, I mean cells in parallel. Like my 10S2P pack contains 10 "banks" of 2 cells in paralell.

65535, yes that is a good idea.

The way I did do it last night with my 5S balancer was to first balance the first 5 cells, then the second set of 5 cells, then balance the middle banks (5-6), then balance 1-5 and 6-10 again... This is offcourse only untill I get my orderd 6S balancer...

The strange thing is that in the first 5 banks, bank 2 is always 0.01V under the rest of the pack. Even after balancing.

So the result of this was:

Bank 1 - 4.18V
Bank 2 - 4.17V (!)
Bank 3 - 4.18V
Bank 4 - 4.18V
Bank 5 - 4.18V
Bank 6 - 4.18V
Bank 7 - 4.18V
Bank 8 - 4.18V
Bank 9 - 4.18V
Bank 10 - 4.18V

I am using the Hyperion 5S balancer to do this for the moment.
Tom Viper is offline Find More Posts by Tom Viper
Reply With Quote
Old Jun 30, 2006, 05:09 AM
Registered User
Joined Nov 2001
1,491 Posts
Nice, after measuring my pack again last night, they cells are all @ 4.18V
Tom Viper is offline Find More Posts by Tom Viper
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion balancing a 7s a123 pack with the TP balancer kogibankole Batteries and Chargers 2 Jun 20, 2007 02:17 AM
Question How to balance a 10S FP with 2 V-balancers ? Ally Batteries and Chargers 3 Dec 28, 2006 07:11 PM
Discussion Using TrueRC pack with 505 Balancer MX400Guy Batteries and Chargers 4 Jul 24, 2006 10:27 PM
Mini-HowTo How to build 3S2P pack with single balance connector supi7 Batteries and Chargers 4 Jan 25, 2006 08:02 PM
How to balance Corona blades with Kyosho balancer lempert Electric Heli Talk 5 Jul 21, 2004 01:30 PM