RE: New 1100 mAh A123 available everywhere and no word here!
Ups, update.... it was a Korean Manufactor - Enerland sorry. See the original post below; ( sorry in German) Die LiFePO4-Technik und die Fa. A123 scheint sich aber weiterzuentwickeln - was letzten Herbst noch nicht so klar war. A123 hat über den Winter den bekannten, koreanischen LiPo-Hersteller Enerland gekauft. Aus der Zusammenarbeit waren auf der Nürnberger Messe die ersten LiFePO4-Zellen in Tüten zu sehen: auch mit 3.3V angegeben, aber auf die Kapazität bezogen sehr ähnliche Gewichte wie LiPo-Zellen. Es lagen 3300mAh, 16AH und 32Ah-Zellen aus. Zielgruppe für die großen Zellen sind klar Elektroautos, die kleine wäre was für den Modellbaubereich. Greets Burkhard
Posted on: 3/7/2008 2:30 AM by Author "madmoony" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=7188516

RE: New 1100 mAh A123 available everywhere and no word here!
Hello all, in a German Forum i have heared that A123 has bought a japanese company wich makes Lipo cells.At the fair in Nuernberg they showed cells in Plastik flat style with 3300 Mah and 16 Ah and also 32 Ah.All A123 technology powered.So why not a word here? Greets from Germany Burkhard
Posted on: 3/7/2008 2:24 AM by Author "madmoony" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=7188505

RE: Comments and Suggestions
Hello, yes higher capacity would be nice.I'm using 6S2P with great results,but a 6S1P solution with 5000mAh would be nicer to handle. For the form factor...what about a semi square solution like the old 3500mAh sub C cells?Not for the size,just for the shape.Easy to handle,still a round sealing area,and the center of gravity is a little bit lower.I'm using the A123 cells in a Mono 2 Powerboat,and so I have the need for a low center of gravity. Also thermal coupling and cooling would be easier by using a semi square shape and with the more volume we get extra capacity(6000mAh?!?!) Greets Burkhard
Posted on: 5/12/2007 1:52 AM by Author "madmoony" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=5843873

New A123 cell in Winter?
Hello all, yesterday i visit the German Modellbaumesse in Dortmund.It's a big fair for all the stuff we need for our Hobby.I heard the "rumor" that in winter there will be a new FePo4 cell awailable with same size but 5000mAh.That i heard from different indipendent sources.So anybody else heard about this? For the Spec's they only told me 25C and 50 C burst,weight is 135 gramm. Brian can you bring some light into this ? Greets Burkhard
Posted on: 4/20/2007 3:17 AM by Author "madmoony" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=5743352

RE: A123 pack life in real world uses?
Wow,that's impressive! Start current over 108 Amps.That's really a "quick charge".How are the cells performing after that torture?Any sags in capacity or Ri ? Burkhard
Posted on: 2/15/2007 4:10 PM by Author "madmoony" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=5423552

RE: A123Racing Battery Questions
Hello dt1, I soldered all my cells inline.When i got them,there are no taps at the ends,just these round areas of a solderable metall(nickel?)Use some grinding paper to make some slightly wipes over the surface and solder them with ordinary solder. Use a iron with at least 80 watt and a hammershaped end. I have used these packs(3S2P) under hard conditions and they are performing very well. Grz Burkhard
Posted on: 2/14/2007 3:24 PM by Author "madmoony" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=5418731

RE: A123Racing Battery Questions
Thank you Brian,thats helpfull information. One more question,what is the maximum CONTINUOS currend you can get from one full charged cell untill its empty in one go,without cooling ? I tested it with 40 Amps but i reach a temperature about 70 degrees. the starting point was 21 degrees. I am talking about a constand currend discharge from full to empty in one go. The spec. says 30C cont. ,that means around 70 Amps. I haven't tryed this because of the high temperature i have reached with 40 Amps. Grz Burkhard
Posted on: 1/6/2007 10:07 AM by Author "madmoony" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=5219790

RE: A123Racing Battery Questions
Hmm,nobody an idea? Whats the way you have designed the 3s2 or 4..5..6s2 packs ? With or without interconections? Burkhard
Posted on: 1/5/2007 10:46 AM by Author "madmoony" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=5214230

RE: A123Racing Battery Questions
Thanks for that fast reply.Yes in deed my charger can only do it's job on a 3s configuration.But the question was a little different... In a 3s2p pack there are normaly no conections between the paralell cells.Only at the endings the two 3s1p are connected together.So my question was if it's better to make all 4 conections instead of only the two at the ends of the packs. i try to figure this out: this is the normal 3s2p version,only connected at the ends I===II===II===I |....................| I===II===II===I and this is the other 3s2p version ,also connections between the cells I===II===II===I |.....|......|......| I===II===II===I I think this should help to hold the cells in balance more efficent,because it will act like as there are only 3 bigger cells instead of 6 individual cells have you understood my question ? Grz Burkhard
Posted on: 1/4/2007 1:38 PM by Author "madmoony" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=5209271

RE: A123Racing Battery Questions
Hello,my name is Burkhard and i am a german A123 cell user.I'm using them in a 6s2p configuration in my Mono 2 Speedboat.For better handling and easier charge i splitted them in 2 times 3s2p. Everything works fine but i have a question to Brian (or anybody else)about the configuration whitch is best for those cells. I have build up 4 times 3s1p and fitted them together as 2 times 3s2p. We discussed here the idea ,it's maybe better for them to build up 6 times 1s2p and then build up the 2 times 3s2p. The difference is small but maybe importand if high currents are used to charge the 3s2p configuration. I use at the moment 20 Amps to recharge them in about 13 minutes each. So,do anybody know what is the better solution?It's easy for me to make the nessesary interconections to change them in a all paralell configuration as mentioned before. Thanks for your help in advance and sorry for the "German English" Burkhard
Posted on: 1/4/2007 10:58 AM by Author "madmoony" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=5208559