Originally Posted by
John Stranahan
... I'll just note that a 10C discharge rate for the 4600 mA-h pack from Horizon is 46 amps.
Thanks for the post guys. Someone needs to give these new cells a long term test.
John
John,
The amperage limitations I mentioned for conventional lithium phosphate does not apply to the A123 "nanophosphate" cells. The A123 cells are a completely different animal. They put out TONS of current. Your goal should be to find a way to drain as high a current as you possibly can with the limited voltage. According to A123's own testing data, a single cell was tested at discharge rates of 100A, 150A, 175A, and 200A for 5 seconds at a time. Max power was achieved at 175 amps (since the voltage drop at 200 was too significant) at 240 watts over 5 seconds for just a single cell. That's a C rate of 80 which beats any lithium polymer.