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Jun 09, 2011, 07:57 PM
just look at it smokin'
z-matrix's Avatar
Quote:
Originally Posted by everydayflyer
Thread on 50C 2200 Billowy here

https://www.rcgroups.com/forums/show...68&postcount=1

First post of that thread has a link to the vendor.

I hope to get a set of leads attached to a single cell in this battery and continue with higher amp. discharges very soon.

It has decided to stop raining here (only 1.1" in May) and as I have planted a lot of new shrubs and trees this year a lot of my time is being spent watering which is not exactly my favorite past time. Most years I run my pumping station 40 to 60 hours from April - Sept. This year 47 hours in the past 4 weeks.

6-8-2011 Added 50-120A Dsc. graph of single cell. Note cell is still part of original 3S battery but I added 5" 10gage leads to cell #3.

6-9-11 Added graph with addational 50A discharges.

Charles
not bad, and it does not even melt
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Jun 09, 2011, 08:08 PM
just look at it smokin'
z-matrix's Avatar
Quote:
Originally Posted by Wayne Giles
Charles,
Perhaps I was jumping the gun; the 120A plot looks pretty impressive, so perhaps they are a genuine 45 or 50C cell which I have never seen. The highest genuine "C" rating I have proven is a 40C. Having seen such a high percentage of lipos fail to meet their claimed "C" rating, it must have made me cynical!
I agree with your comments that they do not actually need to be better as a genuine 20 -25C with a genuine 40C surge rating is more than adequate for over 99% of applications.

Interestingly if you look at the instant voltage drop at the very start of the 120A plot and calculate the IR from that it comes out to about 2.6milliohms which is in agreement with your reading.

Wayne
and they are from hong-kong ...
who gave the technology for them to make these? or they succeeded in a copy?

btw, the peak 90C (or higher) rating would be an open question...
especially for 3Ah+ packs
Jul 26, 2011, 09:00 AM
Registered User
So any progress in the tests of this sample?


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