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Parallel Batteries?

Old 11-04-2008, 04:58 PM
  #51  
john339
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Bex I have been using 4 batteries in a serial, parallel group for quite some time.
I believe that as long as all four batteries are charged using the balance type charger you will have no problems no matter which way you connect them.
I use two of these http://www.hobbycity.com/hobbycity/s...llel_Pack_lead

And one of these http://www.hobbycity.com/hobbycity/s...ries_Pack_lead
After each flight I balance each battery and so far no problems.
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Old 11-04-2008, 06:18 PM
  #52  
kyleservicetech
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More than a few readers have indicated they have measured the current output of each battery pack when several battery packs are paralleled. Please note that this will only be accurate, IF a separate ammeter is used for each battery back.

Just inserting a single ammeter in series with one battery pack of a paralleled pack will affect the ampere valuent reading of that battery pack due to the internal resistance of the ammeter it self.
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Old 11-04-2008, 07:47 PM
  #53  
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kyleservicetech You can use an inductive ammeter which does not interrupt the circuit. This is the one I use. http://www.sears.com/shc/s/p_10153_1...26+Accessories
There are many more available.
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Old 11-04-2008, 08:25 PM
  #54  
write2dgray
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Does anyone know of a commercially available adapter board designed for parallel connection of balance leads?
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Old 11-04-2008, 10:53 PM
  #55  
slipstick
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Originally Posted by kyleservicetech View Post
More than a few readers have indicated they have measured the current output of each battery pack when several battery packs are paralleled. Please note that this will only be accurate, IF a separate ammeter is used for each battery back.
Unless of course the single ammeter used is a clamp ammeter which a) is easy to move from one lead to another and b) has no effect on the circuit it's measuring.

Oddly enough that's what I use (and why I use it ).

Steve
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Old 11-05-2008, 05:50 AM
  #56  
BEX
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Originally Posted by john339 View Post
I use two of these http://www.hobbycity.com/hobbycity/s...llel_Pack_lead

And one of these http://www.hobbycity.com/hobbycity/s...ries_Pack_lead
After each flight I balance each battery and so far no problems.
Thanks for the replies all .
john339 I made myself cables that looks exactly like that , but I am a bit concerned about the battery lead length so I will chop them down to about a third of the length. It will not be an easy solder job but it is doable.
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Old 11-05-2008, 05:54 AM
  #57  
kyleservicetech
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Slipstick
I've worked with electronic stuff for 45 years before retiring this year. First I ever heard of a DC clamp on ammeter that cost less than my model airplanes. Will have to check out that meter from Sears!
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Old 11-05-2008, 11:30 AM
  #58  
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There are many cheap clamp meters on Fleabay.....you just have to be careful to get one that measures DC current as many don't. The cheapest DC ammeters seem to be around $35-40 which is certainly more than a cheap multimeter but less than any Fluke meter (and even less than most of my models ).

Steve
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Old 11-06-2008, 04:13 AM
  #59  
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Slipstick
I just picked up one of those Sears Roebuck AC/DC clamp on ammeters (Sears #82369) today, and checked it against my Fluke 85V multimeter. Sears rates it at plus/minus 2.5 percent plus a few digits.

This meter does meet those specifications on its DC current range, rather nice for a meter that cost $59.95! It even measured a few amperes on its 40 Amp DC range within a 1/2 amp or so.

The meter has many functions, including 40 Amps and 400 Amps on DC, sufficient to measure just about any electric powered model airplane!
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Old 11-08-2008, 11:25 PM
  #60  
Jacket Man
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Originally Posted by write2dgray View Post
Does anyone know of a commercially available adapter board designed for parallel connection of balance leads?
Our multipack balancing boards can be used to Balance up to three packs at a time with our Balance Pro

http://www.commonsenserc.com/product...roducts_id=614

http://www.commonsenserc.com/product...roducts_id=549

Mike
www.CommonSenseRC.com
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