Sorry, the BMS on this pack is hanging outside the pack. There is an image of another pack (32120 cells) that has the BMS mounted inside its wrapping.
The pack is meant to be used by eScooters and such. As these things go it was very economical and seems to be functioning very well - except a crappy spade connection between the pack and BMS. The cost with air shipping included was $450. 20Ah, 48VDC nominal LiFePO4. This included the BMS, a 6A charger, pack and a carrying bag. The mass is 9kg. Here is a link to a torn apart Tesla pack: http://www.teslamotorsclub.com/showthread.php/21850-NHTSA-Opened-Up-the-Model-S-Battery-Pack-Pics Here is an image of guys welding batteries: http://bioage.typepad.com/photos/uncategorized/welding2.jpg On Tue, Aug 19, 2014 at 5:47 PM, Michael Ross <[email protected]> wrote: > I think I gave the URL to view when viewed as me logged in as me. I > haven't sorted out how to get the public URL. I think it used to be > obvious, but I have lost the method :-( > > This battery was purchased through Alibaba from China. The cells are > 18650 size LiFePO4. > > I believe I saw in image of a Tesla pack opened up and it had multiple > thousands of these in it. (I have head they use 6000 or 700 laptop cells) > I am sorry I don't recall where I saw that. Maybe EVTV? > > Seems like welding is the only way to get the sort of reliability you need > if there are no threaded connections. Clamping, as with funky old D cell > flashlights, is clearly not the way to go. > > Yes it is a BMS placed inside the pack. Then they duct taped and hot > glued their way to a reasonably presentable pack. > > I did not build this myself - that is what I was wondering - if anyone > here has tried this sort of thing. I really don't think it would be too > difficult once you knew the recipe. > > Here is another link that might take you to an album of battery images: > > https://plus.google.com/photos/100767276460953028406/albums/5857562724939978177?banner=pwa > > My intention is that it be visible to anyone, and it says that is so, but > I may still be sharing the wrong URL. I will put a few more images at the > website. > > > On Tue, Aug 19, 2014 at 4:53 PM, EVDL Administrator via EV < > [email protected]> wrote: > >> On 19 Aug 2014 at 16:10, Michael Ross via EV wrote: >> >> > This should be viewable by anyone >> > https://sites.google.com/site/michaeleross/misc >> >> This one works fine for me. (I do have javascript enabled for Google; it >> might be required for this page.) >> >> Thanks for setting it up! The two snipurl links said they were invalid. >> >> It's an interesting battery. I take it that's some kind of BMS top right >> in >> the first photo? >> >> What kind of cells are they? I mean what size, chemistry, brand? Did you >> assemble the battery yourself? How did you fasten the links? >> >> David Roden - Akron, Ohio, USA >> EVDL Administrator >> >> = = = = = = = = = = = = = = = = = = = = = = = = = = = = = >> EVDL Information: http://www.evdl.org/help/ >> = = = = = = = = = = = = = = = = = = = = = = = = = = = = = >> Note: mail sent to "evpost" and "etpost" addresses will not >> reach me. To send a private message, please obtain my >> email address from the webpage http://www.evdl.org/help/ . >> = = = = = = = = = = = = = = = = = = = = = = = = = = = = = >> >> >> _______________________________________________ >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org >> For EV drag racing discussion, please use NEDRA ( >> http://groups.yahoo.com/group/NEDRA) >> >> > > > -- > Put this question to yourself: should I use everyone else to attain > happiness, or should I help others gain happiness? > *Dalai Lama * > > Tell me what it is you plan to do > With your one wild and precious life? > Mary Oliver, "The summer day." > > To invent, you need a good imagination and a pile of junk. > Thomas A. Edison > <http://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html> > > A public-opinion poll is no substitute for thought. > *Warren Buffet* > > Michael E. Ross > (919) 550-2430 Land > (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google > Phone > (919) 631-1451 Cell > (919) 513-0418 Desk > > [email protected] > <[email protected]> > > > -- Put this question to yourself: should I use everyone else to attain happiness, or should I help others gain happiness? *Dalai Lama * Tell me what it is you plan to do With your one wild and precious life? Mary Oliver, "The summer day." To invent, you need a good imagination and a pile of junk. Thomas A. Edison <http://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html> A public-opinion poll is no substitute for thought. *Warren Buffet* Michael E. Ross (919) 550-2430 Land (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google Phone (919) 631-1451 Cell (919) 513-0418 Desk [email protected] <[email protected]> -------------- next part -------------- An HTML attachment was scrubbed... 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