RC-Monster Forums - View Single Post - A123 32113 Ultra-B cell, cycling so far

zeropointbug · 10.21.2012, 08:11 PM

FROZEN CELL TEST

Cell temperature: -26 C (-14 F.)

Cell voltage before discharge @ -26 C: 3.456v

Discharge time: 1:56 secs (not 100% DOD, ~70% DOD)

Cell voltage with the 16ft of booster cable (6awg.): 2.02volts
Cell voltage at end of discharge: 2.86volts
Cell temp end discharge: ~10 C (50 F)

Quite a difference in start temp and end temp, at sub zero temperatures the cell is dissipating much more energy as heat... as you can see in the voltage drop.

	(#6)
zeropointbug Z-Pinch racer Offline Posts: 3,141 Join Date: Nov 2006 Location: SK, Canada	10.21.2012, 08:11 PM FROZEN CELL TEST Cell temperature: -26 C (-14 F.) Cell voltage before discharge @ -26 C: 3.456v Discharge time: 1:56 secs (not 100% DOD, ~70% DOD) Cell voltage with the 16ft of booster cable (6awg.): 2.02volts Cell voltage at end of discharge: 2.86volts Cell temp end discharge: ~10 C (50 F) Quite a difference in start temp and end temp, at sub zero temperatures the cell is dissipating much more energy as heat... as you can see in the voltage drop. “The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens