A123 32113 Ultra-B cell, cycling so far

[zeropointbug]

No problem, I figured since there is no videos or discharge tests on this thing, I thought I would do a half rigged setup to cycle it and abuse it.

What datasheet are you looking at? IIRC, they are the most cycle tolerant cell that A123 makes. So far, I see 0% loss in capacity at this point, capacity loss from cycles is pretty linear graph, so I can see this thing lasting thousands... if used for a strictly power pack buffer (micro cycles) then it could last tens of thousands.

I can't post that high rate discharge today like I said.

BTW, I was doing a high rate discharge and forgot about it and the cell was brought down to 0.7volts. I quickly pulled the cable off and I immediately started charging at 0.4amps until it reached 3.0volts.

IR check at Dschg. # 125 cycle - 1mOhm and reporting 4330mah

[zeropointbug]

All IR checks done with 720i NET charger, BULK discharges done with MIXED 720i 10amp discharge, or 13C wire constant resistance discharge, a few heavy discharges of 30C or more.

Dschg#1 - 4300mah IR check: 3mOhm
Dschg#60 - 4315mah IR check: 2mOhm
Dschg#110 - 4350mah IR check: 2mOhm
Dschg#130 - 4340mah IR check: 2mOhm


DSCHG # 131.....

Discharge load 16FT of 6awg booster cable shorted

Cell temp before & after: 111F - 138F

Cell voltage before: 3.425v. fully charged
Cell voltage on load: 3.053v.

Total discharge time: 2:04 mins = 30+ C discharge = 132amps AVERAGE DISCHARGE

Discharge rate would be higher than 30C at start of discharge, and lower at end of discharge.