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Battery Tech Help

Old 11-01-2003, 02:55 PM
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Can anyone tell me what all of the numbers on the printout on my matched cells mean?

thanks,

ff
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Old 11-01-2003, 04:10 PM
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Ill show you one of my old packs and what the numbers mean.
Sec 0247 Seconds At the below discharge
MAH2058 The MAH rating
AVG/V 1.27 Average cell voltage over the discharge
IR 24 Unsure.
MWHR 2319 Unsure.
CHG 4.0 The Amps the pack was charged at.
Disc 30.0 The Amps the pack was discharged at.
Cutoff 0.85V The voltage cutoff per cell for the pack.
What some manufacturers to show what look like better numbers will do is to use a lower Cutoff and/or discharge at a different value to increase the runtime of the pack etc. Try www.teamorion.com they will probly have a FAQ.
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Old 11-01-2003, 04:25 PM
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Heres a picture of one of them, couldnt work out how to turn the flash off my new digi cam only got it yesturday and if i could or not, anyway there it is.
Attached Thumbnails Battery Tech Help-cell.jpg  
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Old 11-01-2003, 04:30 PM
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IR = internal resistance, less is better. they cells have more punch and dont get as hot w/ less IR
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Old 11-01-2003, 04:43 PM
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I guessed it was internal resisitance but whats a high and low value, i dont have any matched 3300's yet to compare to, just a standard saddle pack.
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Old 11-01-2003, 04:51 PM
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my new 1.177 3300 from Fukuyama are 13-14 and some of last years 1.14 3300s are closer to 20.
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Old 11-01-2003, 05:45 PM
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i have some sanyo 3000hv's matched by smc with ir's of 3.2-3.3. i also have some other packs of 3000hv's matched by someone else with ir of around 18. what a difference.
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Old 11-01-2003, 05:52 PM
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Ive been thinking and MWHR may be miliwatt hour. Not sure though.
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Old 11-01-2003, 06:02 PM
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miliwatt hour rating
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Old 11-01-2003, 11:58 PM
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CDC v6 charger for matching cell?

Has anyone tried matching cells using a CDC V6 charger? Is this possible at all with the above charger? Any help would be appreciated if this is possible.
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Old 11-02-2003, 01:36 AM
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Sec - discharge time in seconds... more is better
mah - discharge mah... more is better
avg/v -average voltage over discharge... more is better
IR - internal resistance (there are two types, relative and actual, i think the 20ish's for example are relative, 3.4ish's are actual but it could be the other way round)... less is better
mwhr - milliwatt hour - not too sure what this actually means but they put it there anyway... i think more is better
cutoff - cutoff voltage (the standard is 0.90, but as berger said some matchers use a lower cutoff like 0.85 to make it look like the pack has more runtime)... 0.90 means honest numbers and an honest matcher

i wouldn't use the CDC for matching cells, IMO the discharge numbers it gives aren't really that accurate. for checking cells quality or similar it should be fine but for matching cells you plan to sell the only option really is a turbomatcher 4/35 from CE, these are industry standard.
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