Flashlights only have a current draw of half an amp. The 18650 cells are typically used at FIVE amps. And I often have to shake my flashlights to clean the contacts before they attain normal brightness. (That indicates they a corroding.) About two years ago I recall seeing a spot-welding system and strapping for the 18650 cells, the welder was only about $200 and for building a $7,000 to $10,000 pack, it would seem a reasonable price to pay. I haven't searched for it yet but it had a video so searching on You Tube for "spot weld batteries" might lead to a possible solution...
Dennis Lee Miles (*evprofes...@evprofessor.com <evprofes...@evprofessor.com>)* * Founder: **EV Tech. Institute Inc.* *Phone #* *(863) 944-9913 (12 noon to 12 midnight Eastern US Time)* *Educating yourself, does not mean you were **stupid; it means, you are intelligent enough, **to know, that there is plenty left to learn!* * You Tube Video link: http://youtu.be/T-FVjMRVLss <http://youtu.be/T-FVjMRVLss> * * NEW You Tube Video link: *http://youtu. be/Pz9-TZtySh8 <http://youtu.%20be/Pz9-TZtySh8> On Tue, Aug 19, 2014 at 10:35 PM, EVDL Administrator via EV < ev@lists.evdl.org> wrote: > On 19 Aug 2014 at 21:18, Jay Summet via EV wrote: > > > The contact/connection may not be as good as bolt on terminals, but > > for 18650 cells you could probably get away with it without excessive > > force. Flashlights do it all the time... > > Does anyone here have experience with the screw-terminal 38140 cells > offered > by Headway (and perhaps some of their less well known Chinese competitors)? > Their vendors even offer complete kits with hardware for grouping and > linking cells. > > But then you might be falling back into the problems of loosening and > corroding connections, I suppose. > > They also seem to be a bit more expensive per watt-hour than some other > LiFePO4 cells, but that might be because I don't know where to look. > > 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) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140820/fef73964/attachment.htm> _______________________________________________ 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)
