These center terminals are only sensor terminals with a No 4 mm screw, not a load terminal. Has a thin strip of copper about 3/8 inch wide by about 1/32 inch thick.
The cell itself has a 33.1 ah rating at a normal voltage of 3.8 volts, but the tap connection to the center tap may not handle the full capacity of a cell. Roland ----- Original Message ----- From: Bill Dennis<mailto:[email protected]> To: 'Roland'<mailto:[email protected]> ; 'Electric Vehicle Discussion List'<mailto:[email protected]> Sent: Saturday, October 11, 2014 12:19 PM Subject: RE: [EVDL] Need Lithium batteries. Does anyone know if there's a limit on the amount of current that can be taken out of those center terminals on the Leaf cells? Thanks, Bill -----Original Message----- From: EV [mailto:[email protected]] On Behalf Of Roland via EV Sent: Saturday, October 11, 2014 10:31 AM To: John Lussmyer; Electric Vehicle Discussion List; [email protected]<mailto:[email protected]> Subject: Re: [EVDL] Need Lithium batteries. You have to remember, there are four cells already connected together in each module. Two sets of cells in series and the center tap connects the mid point of the two cells in series. Connecting all three modules center taps, actually parallel six cells together is consider as one cell. This is the same as the manufacturer adds more plates to a cell to increase it area. This would for me to install three 180 cell BMS units. Roland ----- Original Message ----- From: John Lussmyer via EV<mailto:[email protected]<mailto:[email protected]>> To: [email protected]<mailto:[email protected]<mailto:[email protected]%3Cmailto:[email protected]>> ; Electric Vehicle Discussion List<mailto:[email protected]<mailto:[email protected]>> Sent: Saturday, October 11, 2014 9:24 AM Subject: Re: [EVDL] Need Lithium batteries. On Fri Oct 10 19:18:22 PDT 2014 [email protected]<mailto:[email protected]<mailto:[email protected]%3Cmailto:[email protected]>> said: >I've been looking at using LEAF batteries also. Since I'm planning a lower >voltage system than the LEAF, I'm planning on paralleling groups of three packs. >I noticed that the packs bring out the center tap between the two series sets of >cells and I'm planning on paralleling the center connections as well as the ends >of the string, so forcing the cells in the three packs to stay balanced. I quite purposely did NOT parallel the center connections. This allows the BMS to monitor EVERY cell (pair) to detect problems earlier. -- Bobcats and Cougars, oh my! http://john.casadelgato.com/Pets<http://john.casadelgato.com/Pets<http://john.casadelgato.com/Pets%3Chttp://john.casadelgato.com/Pets>> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub<http://www.evdl.org/help/index.html<http://www.evdl.org/help/index.html#usub<http://www.evdl.org/help/index.html> #usub> http://lists.evdl.org/listinfo.cgi/ev-evdl.org<http://lists.evdl.org/listinf<http://lists.evdl.org/listinfo.cgi/ev-evdl.org%3Chttp://lists.evdl.org/listinf> o.cgi/ev-evdl.org> For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA<http://groups.yahoo.com/group/NEDRA<http://groups.yahoo.com/group/NEDRA%3Chttp://groups.yahoo.com/group/NEDRA>>) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20141011/461757c6<http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20141011/461757c6> /attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub<http://www.evdl.org/help/index.html#usub> http://lists.evdl.org/listinfo.cgi/ev-evdl.org<http://lists.evdl.org/listinfo.cgi/ev-evdl.org> For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/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/20141011/97a5e86d/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)
