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Old 07-30-2014, 03:16 PM   #22156
Pakratt76
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Final "Dead A123 2500mah pack" UPDATE:

I did a 10 amp discharge test today down to 2.75v/cell or 5.5v pack voltage.....
Ambient temperature was 75*F

Starting voltage was 6.859v (both cells within 1mv)


Results:

2441mah out at 10 AMPS!!! (timer had 15m:12s) ..... (0.026v difference between cells)


After resting pack for about an hour, I charged back up....

6.301v pack voltage before starting charge.......

(2 minutes into charge both cells within 2mv balance)


2479mah went back in @ 3 amps......(51m:17s on timer)
(7.4mohm/6.9mohm Internal resistance on cells)(balanced within 1mv)


My tests so far say this pack is safe to use, and I couldn't be more happy...
Dodged a bullet on this one!

Note to self: Turn ALL switches off, bonehead!
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Old 07-30-2014, 03:19 PM   #22157
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Quote: Originally Posted by Pakratt76
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Final "Dead A123 2500mah pack" UPDATE:

I did a 10 amp discharge test today down to 2.75v/cell or 5.5v pack voltage.....
Ambient temperature was 75*F

Starting voltage was 6.859v (both cells within 1mv)


Results:

2441mah out at 10 AMPS!!! (timer had 15m:12s) ..... (0.026v difference between cells)


After resting pack for about an hour, I charged back up....

6.301v pack voltage before starting charge.......

(2 minutes into charge both cells within 2mv balance)


2479mah went back in @ 3 amps......(51m:17s on timer)
(7.4mohm/6.9mohm Internal resistance on cells)(balanced within 1mv)


My tests so far say this pack is safe to use, and I couldn't be more happy...
Dodged a bullet on this one!

Note to self: Turn ALL switches off, bonehead!

So
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Old 07-30-2014, 04:26 PM   #22158
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so....what?

It sounds like a good report of resurrecting a pack...or are you seeing something in the numbers that tells you differently?

If you think the pack is still bad, let us know! because I would be tempted to use this same procedure if I had to resurrect a pack from a mistake like this...but I don't want to lose a plane as a result!
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Old 07-30-2014, 04:52 PM   #22159
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Quote: Originally Posted by SnowDog
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so....what?
!
It's one of two things.

1. A Gregisum

2. Thinks it could have internal damage that may not be showing now but could go south down the road and cost a airframe.


I am taking bets that #1 is it.
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Old 07-30-2014, 04:54 PM   #22160
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To quote Kenny "My tests so far say this pack is safe to use, and I couldn't be more happy...
Dodged a bullet on this one!" Ken will be using this very batttery pack at the Hoverpalooza this weekend!!
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Old 07-30-2014, 06:07 PM   #22161
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Quote: Originally Posted by Kitman
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So
So OLD.

Quote: Originally Posted by SnowDog
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so....what?

It sounds like a good report of resurrecting a pack...or are you seeing something in the numbers that tells you differently?

If you think the pack is still bad, let us know! because I would be tempted to use this same procedure if I had to resurrect a pack from a mistake like this...but I don't want to lose a plane as a result!
Very good report! I'm very happy with the results and all looks great...

Quote: Originally Posted by CEThomas
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It's one of two things.

1. A Gregisum

2. Thinks it could have internal damage that may not be showing now but could go south down the road and cost a airframe.


I am taking bets that #1 is it.
Might be a slight bit of Gregisum..... but the pack would have to be much OLDER....

Quote: Originally Posted by Pakratts Mistress
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To quote Kenny "My tests so far say this pack is safe to use, and I couldn't be more happy...
Dodged a bullet on this one!" Ken will be using this very batttery pack at the Hoverpalooza this weekend!!
You betchyah! Right on.... Looks good to go...
and it will be airborne in the Corvus...
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Old 07-31-2014, 04:30 AM   #22162
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Good Thursday Morning!!
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Old 07-31-2014, 05:42 AM   #22163
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one word:


HOVERPALOOZA!!!!!!!!!!!!





Well, maybe a second word too:


COFFEE!!!!!!
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Old 07-31-2014, 06:54 AM   #22164
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A little music for the final countdown to
Hoverpalooza 2K14
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Old 07-31-2014, 09:49 AM   #22165
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Quote: Originally Posted by Buggie
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Good Thursday Morning!!


So
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Old 07-31-2014, 09:57 AM   #22166
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Lol
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Old 07-31-2014, 10:06 AM   #22167
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Quote:
Quote: Originally Posted by Kitman
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So
Quote: Originally Posted by Kitman
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So

2 in a row.....



OH NO......... Did somebody drop a deuce in Kitman's Cornflakes?




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Old 07-31-2014, 10:43 AM   #22168
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Quote: Originally Posted by Pakratt76
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2 in a row.....



OH NO......... Did somebody drop a deuce in Kitman's Cornflakes?




Didn't mean to
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Old 07-31-2014, 11:05 AM   #22169
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maybe he's trying to tell us that he's taken up sewing.
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