|May 08, 2009, 02:03 AM|
Testing the waters: Large, cheap packs?
Hello. I have recently acquired a large quantity of Sony 26650VT cells which I plan on using for an EV project.
In short, I am wondering if you folks would be interested in me putting together some large packs.
Here is the story of these cells:
The cells are from a certain power tool company that had a defective battery pack design. The BMS board broke after the first charge on many of the packs. If this did not cause a failure, then the poorly welded battery straps connecting the cells were next in line. The battery packs were re designed (old designer was fired?) with 5 spot welds and a new BMS board. These cells are warranty returns. The bulk of them received no more than a few charge cycles.
Now on to the specs:
Rated Capacity - 2500mah
Tested Capacity ~2200mah
Voltage - 4.1v - 2.5v
Energy Density - 250wh/L
Max. Output - 50 amps
Weight - 90g
Size - 26mm x 65mm
Here is a forum posting about them:
They are similar to A123 in ways (long life, safe). They are heavier however, and are happy with 10c continuous and 20c burst, unlike the A123's 30/60c.
I would be willing to put together packs for ~ 4$ per cell.
An example pack:
10S3P: 41v, 6450mah, 2735grams. Good for 65 amps cont. 120 amps burst.
This battery would work very well for any sort of large sport flier, probably not so well for a 3D.
Tell me if you have any questions/are interested.
|Category||Thread||Thread Starter||Forum||Replies||Last Post|
|Sold||Large Lipo packs cheap||Steve H.||Aircraft - Electric - Batteries & Chargers (FS/W)||9||Apr 18, 2008 09:58 PM|
|FS: Large Lipo packs NEW||Jet Dreams||Aircraft - Electric - Airplanes (FS/W)||13||Aug 07, 2004 08:03 AM|
|Large, Cheap, Surplus Coreless Motors?||Dave Hederich||Scratchbuilt Indoor and Micro Models||5||Nov 07, 2003 07:51 PM|
|Testing the waters for selling my Venus||Heli Slime||Aircraft - Electric - Airplanes (FS/W)||4||Apr 01, 2003 11:50 PM|
|Best Charger for small. medium, large capacity packs||microflyer77||Batteries and Chargers||1||Dec 19, 2002 11:08 PM|