Lipo's wired in Series or Parallel? Can Lipo's be wired in series and/or parallel to up the voltage or mah? examples: can I wire three (3) 1S cells in series to get 11.1V? could I wire two (2) 3S pack in parallel to combine their MaH for more runtime? Would doing either of these setups affect their _C rating? ex: would three 1S 10C wired in series for 11.1V give me 30C? or would it still stay at 10C? I'm looking into Lipo's for my next battery and am thinking about my options for creating "saddle" packs since no one makes them (that I've found) or getting 2 cheaper low MaH and wiring them in parallel to double the mah. |
after some searching http://www.rccrawler.com/forum/showt...o+wired+series it looks like I can wire them in series, but what about parallel? and how does either configuration affect the amperage _C rating? |
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Here's nine options. http://www.maxamps.com |
I had just found the saddle packs that MaxAmps has myself when you posted. You're link doesn't work though - it goes to the picture. Here it is for anyone looking http://www.maxamps.com/products.php?cat=54 This is the one I'm considering getting now: http://www.maxamps.com/Lipo-2200-111-Saddle.htm 2200mah 3S2P 11.1V & Maximum Continuous Discharge 33 amps |
Oops, thanks. |
Does anyone know if I can run a 2 Lipo packs in Parallel to combine their mah for more runtime? I know I can do this with traditional NiMH cells, but I'm wondering if it would screw up the balancing or whatever of the Lipo's and wreck them? I'm thinking of getting the 2200 saddle pack (above) and adding another small 3s lipo on the chassis somewhere to get well over 3000mah |
Yes you can run them in parallel. I like to keep my parallel lipo packs seperate so that a bad cell can be identified easier. A 3s2p pack has 6 chances of a bad cell, whereas a single 3s pack has 3 chances and can be diagnosed easier. I charge the packs seperate or as one 6s pack, then run them in parallel for double runtime. My Scaler gets 4200mah sometimes. |
Thanks JRH Does that mean I'd need something like this to keep them balanced while I run and/or charge them? Hyperion LBA10 Network Cable Adapter I would I simply have 2 connectors to run and charge them? One Parallel connector like This to run and one series connector like This to charge them (or disconnect them and charge separately) |
Yes you can run them in series and/or parallel just fine. I would recommend charging each pack seperate, though you definitely can charge them in series or parallel as well. Series will simply increase the voltage, the c rating will stay the same. so 3 10c 3000mah cells is series will give you an 11.1v 3000mah 10C pack, capable of putting out 30 amps. Parallel will increase the Mah, but again the C rating will stay the same. so two 11.1v 3000mah 10C packs in series will create an 11.1v 6000Mah 10C pack, capable of putting out 60 Amps. |
Parallel for running them, and series for charging them is fastest. You will also need a balancing adapter and LBA10 to get the job done properly. Maxamps should be able to hook you up with a two pack balancing deal. |
One more question... Running them in parallel, would I need to make sure they both have the same mah & C rating? or is it okay to mix them up and I would just have a different max output? |
It is best to have the same mah and C rating, but they can be mixed. I don't recommend it though. |
Thanks JRH, I just used MaxAmps Live Help and chatted with Jason about it. Got a similar answer. Very helpful and knowledgeable guy. I'll include the transcript for anyone searching/reading that might have the same questions as me Quote:
I am going to call them now to build a custom saddle pack. JRH - What continuous & max Amp discharge rate would your Cobalt 7T require? |
Get something with at least 30 amps continuous IMO, maybe a bit more. It is the bursts that will slowly kill the pack, but that will depend on how much throttle you can grab before things break. |
Thanks John! I'm glad to have ordered a motor from a vendor that is so helpful & knowledgeable"thumbsup" |
Motors are what I dream about when I nap in the afternoon. |
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