I have seen people use rebar, and welded wire fencing. The rebar guy laid it on a bare sandy patch of ground, Jack Rickard bent a 20ft piece halfway and hung it from his shop ceiling (put 1000A through it). The fence guy rolled up the fencing and stood it in a trash can of water. I made an accordion of rebar by welding 18in pieces together so it wouldn't take up much space. I have not used it yet, but I can't see a problem with it. I have a shunt and a JLD404 to measure it. This is for doing a pack but the same hardware can work for cells. On Jun 23, 2016 2:02 PM, "Mike Beem via EV" <[email protected]> wrote:
I spent some time looking through the archive, but couldn't find what I'm looking for--> I think I have one weak cell in my 40 cell 100 Ah pack; I'm getting a low battery signal (mini BMS) under load when there is more than sufficient range left on the charge. These are CALB batteries which I installed in December 2012. I recently tried going through and individually charging each one to 3.5v (after charging the whole pack to shut-off point) with my variable power supply, and at 2 amps maximum, it took me almost 2 weeks of not driving the EV (http://www.evalbum.com/4181) to get all the way through, so I used a timer, which of course, would defeat the whole process by not being able to WAIT for 3.5v on every one... When I first started driving it with the new pack in 2012, it did have the 40 mile range I aimed for when I put this together. I have only driven it to the limit of the pack once since then, and it was in a colder winter than we usually have, so I wasn't surprised to have much less range. I need an easy to put together load I can use with a voltmeter to test cells, and a range for what voltage drop on these CALB cells would be normal or weak. I got fairly good at this with lead acid, both flooded and AGM, but don't have the experience or science to know if, 1) this is a reasonable way to proceed, and, 2) what those voltage-drop decision points would be, and, 3) what components to use for the load? Thank you! Michael B -------------- next part -------------- An HTML attachment was scrubbed... URL: < http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160623/fd3e157a/attachment.htm > _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at 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/20160623/89bc42dd/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
