m1 cell question

[zeropointbug]

You mean you are going to sit there will doing a CV phase! :026:

EEK, i would rather spend $80 on the A123 charger, it will charge your pack in 15 minutes. Of course it only charges up to 3 cell at a time, you also need a balancer cable.

T-MAXXRacer32 - If you don't have any packs, i would if i were you just buy there Hypersonic packs, they have 2s1p, 3s1p, and 2s2p packs, from there you can make pretty well any combo of total pack power/XsXp. You could if you wanted buy a new DeWalt 36 volt pack and manually make a pack, just put an Anderson balancer cable on, and use A123's chargers for 15 min charges.

It's up to you.

[MetalMan]

Originally Posted by zeropointbug

You mean you are going to sit there will doing a CV phase! :026:

EEK, i would rather spend $80 on the A123 charger, it will charge your pack in 15 minutes. Of course it only charges up to 3 cell at a time, you also need a balancer cable.

IMO, $80 is a rip off for the A123 charger. I can get an Astroflight 109 for $90, and that will charge 10s A123 cells. Then, I can mod the 109 to charge to 3.6v/cell AND do the CV phase, or I could charge 10s A123 as 9s Lipo (with a slight overcharge). Supposedly Astroflight is working on a chip that will allow for the charging of A123 packs.
Otherwise, the CV phase shouldn't be long with these batteries, considering that when the voltage reaches about 3.65v the cell is almost completely charged (indicated by how the cell will cause the voltage to skyrocket when a CC charge is going on).

[zeropointbug]

Well, for my 5s2p pack on my power supply charging, i charge them in 27 minutes. I get to CV phase at roughly 20 minutes, and then the current is still over 5 amps for several minutes, and negative exponentially dies off. So it's i guess over 85% charged at beginning CV phase.

Okay, the cheapest way to get going with A123's is buy a dewalt drill pack, or buy A123 Racing website. Then just buy the NEW Lipodapter which works with A123 cells, and charge is using a lithium charger if you have one or whatever.

[starscream]

Originally Posted by MetalMan

IMO, $80 is a rip off for the A123 charger. I can get an Astroflight 109 for $90, and that will charge 10s A123 cells. Then, I can mod the 109 to charge to 3.6v/cell AND do the CV phase, or I could charge 10s A123 as 9s Lipo (with a slight overcharge). Supposedly Astroflight is working on a chip that will allow for the charging of A123 packs.
Otherwise, the CV phase shouldn't be long with these batteries, considering that when the voltage reaches about 3.65v the cell is almost completely charged (indicated by how the cell will cause the voltage to skyrocket when a CC charge is going on).

I agree that $80 for a 3S charger is over priced. The FMA Direct CellPro 4S charger can now Charge & Balance A123 packs at 3Amp for $60. However, The Astroflight 109 for $90 will charge Lipo's and A123's but it will not balance them. Are you planning on configuring you packs with balancing wires? I find the whole balacing connector differences quite a PITA. It seems everyone has their own connector and I'll have to get an adapter if I want to use someone else's charger/packs.