I do not use any of these contact compounds at all in 37 years on battery contacts. Why, because in our electric work, I have notice a slight increase of resistance across these contacts.
If you use the correct battery links or battery clamps that is compactible to the battery contacts and applied the correct torque and re-torque, there should be no problems. I use cadmium plated copper terminals and/or battery clamps that are torque to 12 foot lbs or 100 inch lbs. If you tried to tighten these with out a torque wrench, most people will stop at about 50 to 60 inch lbs because they think they will break the post off. I first prepare the the battery links by hydraulic crimping a full 360 degrees around the barrel of the terminal. If using a battery clamp, I remove the battery clamp bolt and insert a taper cork in to the contact surface. Dip the hole battery clamp into that tool dip rubber compound which is label for use with battery terminals. I use a black and red compound. Let dry for awhile, until it is some what tacky and slip on HD heat shrink that has the sealant in side. The HD type will get up to about 1/8 thick wall when heated. We use this type for making under ground cable splices. Wipe the cable with alcohol before installing the heat shrinks. When installing these links, I use a backup wrench or tool with a torque wrench that I also cover with this heat shrink. The backup tool is a all plastic clamp that is clamp to the barrel of the link. I first tighten the battery clamp to about 50 inch lbs and then install a stainless steel washer and nut on the stud that comes out of the top of this type of battery. Torque this stud to about 50 inch lbs which expands the post against the battery post. Then tighten the battery clamp to 100 inch lbs. Drive the EV for about 5 miles and re-torque all the connections again. You will find that you will lose about 5 inch lbs. This is call SHRINK BACK of he surface contacts. You may have to repeat this re-torque several times before the torque readings steady out. After the re-torque, I brush on this tool compound around the bottom of the battery clamp down to the surface of the battery. After 8 years and 8 months when I remove replace the batteries, the post contacts was still a mirror surface. Roland ----- Original Message ----- From: "Evan Tuer" <evan.t...@gmail.com> To: "Electric Vehicle Discussion List" <ev@lists.evdl.org> Sent: Wednesday, April 24, 2013 8:47 AM Subject: Re: [EVDL] voltage sag solution > I didn't have access to any of these exotic compounds so used "vaseline" > (petroleum jelly) and that's been OK for 4-ish years in the same > application Ben mentioned. > > > > On Wed, Apr 24, 2013 at 2:18 PM, Ben Apollonio <e...@bapollo.com> wrote: > > > Hi Ben, > > > > Not only does the aluminum want to oxidize, but you're mating it to > > copper > > straps. If any moisture gets in there, you've just made a galvanic cell > > that wants to corrode itself further. When I looked into this for my > > 914, > > I settled on a (slightly hard to find) grease called Penetrox A. There > > were some aspersions cast on Noalox, but I'm afraid I can't remember the > > details of what they were -- perhaps its applicability to > > aluminum-copper > > junctions vs. just aluminum. In any case, I've had to remove my > > batteries > > once or twice, and the Penetrox A has protected the terminals nicely. > > Shiny as the day I first installed them. > > > > Cheers! > > -Ben > > > > On Apr 23, 2013, at 11:10 PM, Ben Jarrett wrote: > > > > > > > > > > > Hey All, > > > > > > I've been battling low voltage on my cells and was convinced I had a > > > bad > > cell. I ordered 4 cells > > > as spares (since the blue CALB 130 Ah cells are being discontinued). > > > > > > Well, I replaced once cell and in doing so, decided to clean the > > > copper > > jumpers at the same time > > > (there was a slight bit of blackness on one of the copper jumpers.) > > > > > > After driving, I found another cell that was dipping to around 2.6V. > > > I > > decided to clean the > > > copper jumpers using my bench grinders wire wheel. I re-installed and > > my drop improved to 2.8V > > > under ~300 amp loads. > > > > > > So now I'm thinking I need to clean all 50 of my jumpers and I'd like > > > to > > put something on the joints. > > > I've found some old threads on the matter. It seems like a good idea > > > to > > put some kind of joint compound > > > in there since one of the CALB battery terminals is aluminum and will > > want to oxidize. I'm thinking > > > of using this stuff: > > > > > > http://www.amazon.com/Noalox > > ®-Anti-oxidant-Compound-Oz-Bottle/dp/B0019KHHRE > > > > > > any thoughts? > > > > > > thanks! > > > > > > -ben > > > www.evalbum.com/4001 > > > > > > > > > > > > -------------- next part -------------- > > > An HTML attachment was scrubbed... > > > URL: < > > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130423/3f0d3262/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) > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130424/1d9833f0/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)
