I am repairing a headway battery from china at the moment, made a deal with Conhismotor who supplied it, they supply the new cells and I do the labour. I usually buy from evlithium. Dealing with china is different, freight costs are so high that you have to consider the cost of sending a pack back carefully, it is often not worth it. This pack has 48 38120L cells, groups of 3 in parallel, 16 groups in series. I see Headway spec says up to 5% per month self discharge, but most of the pack has close to zero. The BMS can only bypass 50 or 100ma or so (it has SM resistors for this!), so it stands little chance of equallising 5% per month difference. All the cells may be in spec, but the battery does not work
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of emf-evdl Sent: Thursday, 19 December 2013 12:32 p.m. To: Electric Vehicle Discussion List Subject: Re: [EVDL] Looking headway completed packs Buy direct from headway. http://www.headway-cn.com/index.html <http://www.headway-cn.com/index.html> Be warned, by the time you pay for shipping and any associated fees, you get a pack that has little or no warranty. Don't expect China to help deal with any warranty claims. After all is said and done, 38120S Headway cells aren't that much better than some CALB cells. Depending on how many Ah you need, if you can do 40/60/100, then CALB are a much better deal. You don't have to worry about all that bussbar. This is coming from someone who's built a few large packs using headway. I'd do it differently today. > On December 18, 2013 at 2:08 PM Peakfoto Digital Photo Still n Video > <[email protected]> wrote: > > > Where can I find completed headyway battery packs form china or something? > > I'm looking for 36 volts 8-10 ah pack . > > most amaercans dealers are spendy . > > _______________________________________________ > 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/20131218/637951e5 /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) _______________________________________________ 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)
