On 15 January 2014 20:05, EVDL Administrator wrote:
> Here the instructions are reversed from Noalox's - abrade the conductor,
> THEN apply Penetrox. It seems to me that the Noalox instructions would be
> more consistent with better oxidation prevention. The Penetrox instructions
> would leave t
I also had no luck searching or from the usual suspects, Newark, Allied
Digikey, McMaster Carr, Graybar. A bunch of Alibaba stuff, and Indian
manufacturers of strip. No US suppliers. Apparently, bi-metal washers are
not a high volume product. Ran out of time.
If someone finds a supplier, not j
To: Electric Vehicle Discussion List<mailto:ev@lists.evdl.org>
Sent: Tuesday, January 14, 2014 11:22 PM
Subject: Re: [EVDL] Dissimilar Metal Contact on LiFePO4 Battery Posts
Roland, thanks for that info, nice find.
Performix Plastic Dip Rubber Coating:
http://www.plastidip.net
On 14 Jan 2014 at 12:41, Michael Ross wrote:
> I never found anything about how to use NoAlOx at the Ideal Industries
> website - can you direct me to that info?
Look here for a photo of the instruction label from the back of the bottle.:
http://naturevaper.com/image/cache/data/products/Noalux%2
Roland, thanks for that info, nice find.
Performix Plastic Dip Rubber Coating:
http://www.plastidip.net.au/category/plasti-dip-500ml
Bimetal washers seem to be a bit harder to find...
Could you post a link?
-
Manfred
On 15 January 2014 02:09, Roland wrote:
> The interface washers that is place
14, 2014 9:41 AM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] Dissimilar Metal Contact on LiFePO4 Battery Posts
No, I'm not surprised and the leaching and tracking it around won't do
much
either.
I have been sloppy saying grease and paste. A silver paste will do
more.
Not a grea
Skype: cor_van_de_water Tel: +1 408 383 7626
-Original Message-
From: ev-boun...@lists.evdl.org [mailto:ev-boun...@lists.evdl.org] On
Behalf Of Michael Ross
Sent: Tuesday, January 14, 2014 9:41 AM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] Dissimilar Metal Contact on LiFePO4
Michael Ross wrote:
creepage... and clearance... on the Thundersky cells I have is
a couple inches and the voltage under 4V - I think that will be quite OK.
Ah, but the problem is that EVs will string a hundred cells in series to
make a high voltage pack. Let's say they are in a metal box (a c
No, I'm not surprised and the leaching and tracking it around won't do much
either.
I have been sloppy saying grease and paste. A silver paste will do more.
Not a grease at all. But really clamping force is the hot tip.
So NoAlOx doesn't do much to improve conductivity. Or is that a
misinterp
On 13 Jan 2014 at 21:06, Michael Ross wrote:
> Why would anyone want to put an insulating paste in an electrical
> connection when a conductive material could be used instead?
If you're talking about Noalox and its ilk, try sticking the probes of your
ohmmeter in a glob of that "conductive mate
Excellent Manfred. Thanks. Much less speculation now.
--
Put this question to yourself: should I use everyone else to attain
happiness, or should I help others gain happiness?
*Dalai Lama *
Tell me what it is you plan to do
With your one wild and precious life?
Mary Oliver, "The summer day."
I think you are imagining the business about conductive grease leaching. A
speculative or throw away comment. Careful application and a clean rag
ought to help.
The creepage (distance along surfaces between conductors, similar to
clearance the straight line through air) on the Thundersky cells I
com>
To: Electric Vehicle Discussion List<mailto:ev@lists.evdl.org>
Sent: Monday, January 13, 2014 10:41 PM
Subject: Re: [EVDL] Dissimilar Metal Contact on LiFePO4 Battery Posts
Thank you for posting that, Manfred. Very enlightening and helps
understanding what is going on. Ma
Michael Ross wrote:
Dielectric essentially means non-conductive. The whole point of NoAlOx is
to enhance conductivity and it contains zinc powder - some one said (I
haven't looked into it much).
Theoretically, why would you want to put a non-conductive material between
two current carrying memb
Thank you for posting that, Manfred. Very enlightening and helps
understanding what is going on. Maybe I should move the brass flat
washers between the Al posts and Cu straps on my pack. If I ever get a
chance I'll see if I can test it out, especially if I ever have to
reconfigure my pack. Maybe so
I found a relevant paper on IEEE Xplore: "Electrical performance of
aluminium/copper bolted joints".
http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=04643511
After an initial read, the points I noted are:
- Surface preparation is very important.
- Petroleum jelly is useful.
- Avoid load-spr
On Mon, Jan 13, 2014 at 6:06 PM, Michael Ross wrote:
> My main comment before I get distracted... is: Why would anyone want to
> put an insulating paste in an electrical connection when a conductive
> material could be used instead?
Because the conductive material could leach across the tops to
My main comment before I get distracted... is: Why would anyone want to
put an insulating paste in an electrical connection when a conductive
material could be used instead?
==
@ Lawrence: dielectric also means it supports electromagnetic fields, which
more of
Water
Sent: Monday, January 13, 2014 5:52 PM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] Dissimilar Metal Contact on LiFePO4 Battery Posts
Manfred,
That is what I said: "Passivation layer" means that the material no
longer reacts, because the alu metal is covered in non-reactin
ic Vehicle Discussion List
Subject: Re: [EVDL] Dissimilar Metal Contact on LiFePO4 Battery Posts
Aluminium oxide is an insulator.
http://en.wikipedia.org/wiki/Aluminium_oxide
"Metallic aluminium is very reactive with atmospheric oxygen, and a
thin passivation layer of aluminium oxide (4 nm thicknes
plugs for example
>>>
>>> http://ecat.burndy.com/Comergent/burndy/product/PENA134
>>>
>>> this seems to be zinc-fume/dust in thick non-petroleum grease and used for
>>> joins with alu-alu or alu-copper.
>>>
>>> /John
>>>
>>&g
essage-
From: ev-boun...@lists.evdl.org [mailto:ev-boun...@lists.evdl.org] On
Behalf Of Lawrence Harris
Sent: Monday, January 13, 2014 4:05 PM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] Dissimilar Metal Contact on LiFePO4 Battery Posts
Just looked up NoAlOx.
Improves serv
>> this seems to be zinc-fume/dust in thick non-petroleum grease and used for
>> joins with alu-alu or alu-copper.
>>
>> /John
>>
>> ----
>>> From: marke.han...@hotmail.com
>>> To: ev@lists.evdl.org
>>&
---
> > From: marke.han...@hotmail.com
> > To: ev@lists.evdl.org
> > Date: Fri, 10 Jan 2014 10:04:14 -0500
> > Subject: [EVDL] Dissimilar Metal Contact on LiFePO4 Battery Posts
> >
> > Hi Lee etc:I thought that stainless bolts would be a pr
; Date: Fri, 10 Jan 2014 10:04:14 -0500
> Subject: [EVDL] Dissimilar Metal Contact on LiFePO4 Battery Posts
>
> Hi Lee etc:I thought that stainless bolts would be a problem on connections
on the Cray-3 supercomputer I worked with Seymour Cray on in Colorado Springs
but the actual ele
> From: marke.han...@hotmail.com
> To: ev@lists.evdl.org
> Date: Fri, 10 Jan 2014 10:04:14 -0500
> Subject: [EVDL] Dissimilar Metal Contact on LiFePO4 Battery Posts
>
> Hi Lee etc:I thought that stainless bolts would be a problem on connection
Hi Lee etc:I thought that stainless bolts would be a problem on connections on
the Cray-3 supercomputer I worked with Seymour Cray on in Colorado Springs but
the actual electrical connection is *not* through the bolt but through the
contact surfaces of the terminal top and strap (the power suppl
27 matches
Mail list logo
