Turnigy 4500Ah LifePo Packs

[ELECTRIC AVENUES]

I was thinking of getting some of these as an alternative to building my own A123 packs.

Unfortunately, I have no idea how many to buy or how to arrange them in order to power a 72v 50A controller, with the LVC being 55 volts.

I have been told that it is important to mate the power of my battery to the amperage demands of the controller as congruently as I can.

So...how many do I need, and how do I best arrange them???

Many thank in advance!!!

 

[NRG]

Crikey! at 72v you are going to need 22 cells in series to get 72.6v nominal...but I think HobbyCity only have them is 3s and 6s configs so you'll either have to go for 21 cells (6+6+6+3) 69.3v or 24 cells for 79.2v nominal. Whats the max. rated voltage for the controller?

After you choose your cell number and packs it then a question of paralleling up the packs to get the Ah you require....your gonna need a load of them! 50A at 72v is 3.6Kw! ...the wiring dosen't bare thinking about...

What's the application? You may want to concider the Thunder Sky batteries from here: http://www.evcomponents.com/SearchResults.asp?Cat=28

Or drop a PM to Emissions Free on this forum and ask him about these new super Prismatic A123 cells or a PM to Cell-Man on Endless Sphere (same guy). These new cells seem to have really good power density, great discharge capability and and very very compact...

 

[ELECTRIC AVENUES]

Crikey! at 72v you are going to need 22 cells in series to get 72.6v nominal...but I think HobbyCity only have them is 3s and 6s configs so you'll either have to go for 21 cells (6+6+6+3) 69.3v or 24 cells for 79.2v nominal. Whats the max. rated voltage for the controller?

After you choose your cell number and packs it then a question of paralleling up the packs to get the Ah you require....your gonna need a load of them! 50A at 72v is 3.6Kw! ...the wiring dosen't bare thinking about...

What's the application? You may want to concider the Thunder Sky batteries from here: http://www.evcomponents.com/SearchResults.asp?Cat=28

Or drop a PM to Emissions Free on this forum and ask him about these new super Prismatic A123 cells or a PM to Cell-Man on Endless Sphere (same guy). These new cells seem to have really good power density, great discharge capability and and very very compact...

The application is a 5304 Crystalyte hub motor. I dont have to buy the turnigy packs, I have had trouble sourcing legitimate reliable A123 cells, and thats why I came to be looking at the Turnigy Packs.

The maximum rated voltage, AFAIK, is 72 volts.

Thanks for the heads-up on who to speak to, I will check them out. Many thanks.