Old 04-15-2011, 02:08 AM
  #1  
miernik
New Member
 
Join Date: Mar 2011
Posts: 15
Default FMA Cellpro PowerLab 8 regenerative discharge power source?

What are the limitations on the power source used in case of using the regenerative discharge function?

Does it absolutely have to be a lead-acid battery, or can I have a chain of 8 LiFePo4 batteries as the power source and it will do fine? Eight LiFePO4 have the same charging voltage (28.8V) as two lead-acid batteries, so it should be possible to do? There will be no BMS, but if I make the source battery larger then the one on the other side of the charger, there should be no risk of overcharging, no?

I read that the Cellpro auto detects the power source, and will not allow me to use regenerative discharge if its not a lead-acid battery. Will it refuse a LiFePO4 instead of a lead-acid?

And what if the power source would be a battery and another 28.8V DC power supply connected to it in parallel, with a small limited current (say C/20) to replace the energy lost in charging inefficiency? Is that possible to do, or will the PowerLab refuse to do regenerative discharge in such setup?

I want to do long-term cycling of 10000 cycles at 4C of A123 and Headway cells. Headways are 10Ah per cell, and I want to charge/discharge them at 4C, which is a full 40A. It'd be problematic to get a large-enough lead-acid battery to accept so much charge, buying a 400Ah lead acid... no way! Much easier and cheaper to get another LiFePO4 and flush the energy back and forth between two LiFePO4 packs.
miernik is offline  
 
Page generated in 0.06791 seconds with 7 queries