I had a look at the headway factory interconnects, they are plated steel I
think as they are magnetic, could be nickel but they were strongly attracted to
a magnet so I think steel. 1mm thick, 20mm wide.
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Nickel is ferromagnetic also. (Hence, Alnico magnets, the Ni being nickel.)
http://en.wikipedia.org/wiki/Permeability_(electromagnetism)
Nickel is right there with carbon steel in magnetic permeability, but it is
much less susceptible to corrosion. Stamped steel with a nickel plate
might be a
Nelson
via EV
Sent: Thursday, September 25, 2014 2:38 PM
To: Michael Ross; Electric Vehicle Discussion List
Subject: Re: [EVDL] Dissimilar metals on Headyways?
I asked Jim of Headway-Headquarters what the end plates were and he
said that they are nickel plated steel.
On Thu, Sep 25, 2014 at 2:20 PM
] On Behalf Of David Nelson
via EV
Sent: Thursday, September 25, 2014 2:38 PM
To: Michael Ross; Electric Vehicle Discussion List
Subject: Re: [EVDL] Dissimilar metals on Headyways?
I asked Jim of Headway-Headquarters what the end plates were and he
said that they are nickel plated steel
...@tylernz.com, Electric Vehicle Discussion List ev@lists.evdl.org
Subject: Re: [EVDL] Dissimilar metals on Headyways?
George Tyler via EV wrote:
Why not just buy the link plates that headway sell, made for the purpose.
Get the cell mounts at the same time?
Are these just a flat bar that bolts
Vehicle Discussion List
Subject: Re: [EVDL] Dissimilar metals on Headyways?
If there is a platting house nearby, they won't charge much for a basket of
copper bits. Could be far less trouble than manual tinning. Nickel might
be better choice in that case. Of a flash of nickel under the tin. I would
George Tyler via EV wrote:
Why not just buy the link plates that headway sell, made for the purpose.
Get the cell mounts at the same time?
Are these just a flat bar that bolts directly between cells. If so,
that's not a good way to do it.
The cells will move slightly due to road bumps and
: [EVDL] Dissimilar metals on Headyways?
I think you're fighting a losing battle. Different alloys have an
influence, but not enough to overcome the fact that copper has roughly
twice the conductivity (both electrical and thermal) of aluminum. You'll
need twice the cross-sectional area in aluminum
: Sunday, September 21, 2014 11:22 PM
Subject: Re: [EVDL] Dissimilar metals on Headyways?
via EV wrote:
I might well be fighting a losing battle, but for the price of 4 holes in a
strip of material it has been a great education.
Tonight I tested the different alloys of Al idea.
Last
On 22 Sep 2014 at 7:55, Roland via EV wrote:
You can get the plated copper bus bars in long lengths and cut them to size.
You will note that the cut ends will show copper. In wet locations, coat
these cut ends with silver paint or epoxy silver paint.
Why not tin them with solder? I would
If there is a platting house nearby, they won't charge much for a basket of
copper bits. Could be far less trouble than manual tinning. Nickel might
be better choice in that case. Of a flash of nickel under the tin. I would
do tin/lead dip if I was not concerned about ROHS and had a plater
I think you're fighting a losing battle. Different alloys have an
influence, but not enough to overcome the fact that copper has roughly
twice the conductivity (both electrical and thermal) of aluminum. You'll
need twice the cross-sectional area in aluminum as you would need with
copper to
is the big difference.
Sent: Sunday, September 21, 2014 at 11:03 AM
From: Chris Tromley ctrom...@gmail.com
To: evdragra...@email.com, Electric Vehicle Discussion List
ev@lists.evdl.org
Subject: Re: [EVDL] Dissimilar metals on Headyways?
I think you're fighting a losing battle. Different alloys have
via EV wrote:
I might well be fighting a losing battle, but for the price of 4 holes in a
strip of material it has been a great education.
Tonight I tested the different alloys of Al idea.
Last time, 0.02 x 1.75 in strip of roof flashing aluminum:
~120 F temperature rise in ~15 seconds, cross
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argh, stupid mailer keeps defaulting to html. Anyway, here's the post again:
This guy on endless-sphere cut one apart and says there is aluminum below the
steel screw part:
http://www.endless-sphere.com/forums/viewtopic.php?f=14t=8109hilit=BMI+inside
So my basic question is if the cell is
via EV wrote:
So my basic question is if the cell is already Al to Steel
internally, might it be better to go Al to Steel to Al (that last Al
being my intercell connectors) than to do Al to Steel to Cu (which
would be copper intercell connectors)?
What little I know about metallurgy tells me
Why do we think the cap is steel? Nickel is a better choice if you don't
look at cost. Or a bonded bimetal.
There are probably ways to do a good job of this. I have cooking pots that
are aluminum bonded to stainless steel. Like wise copper to stainless. I
have used silver bonded to brass
Wow, I can't believe they actually used steel in those connections. I had
heard about it but presumed people were confusing nickel-plating with
steel. Nope, that is steel with rust an everything.
Stay away!
On Thu, Sep 18, 2014 at 9:21 PM, EVDL Administrator via EV
ev@lists.evdl.org wrote:
On
Subject: Re: [EVDL] Dissimilar metals on Headyways?
Why do we think the cap is steel? Nickel is a better choice if you don't
look at cost. Or a bonded bimetal.
There are probably ways to do a good job of this. I have cooking pots that
are aluminum bonded to stainless steel. Like wise copper
September 2014 at 18:51:18
From: Michael Ross via EV ev@lists.evdl.org
To: Lee Hart leeah...@earthlink.net,Electric Vehicle Discussion
List ev@lists.evdl.org
Subject: Re: [EVDL] Dissimilar metals on Headyways?
Why do we think the cap is steel? Nickel is a better choice if you don't
look at cost
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On 19 Sep 2014 at 5:30, via EV wrote:
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Please post in plain text, or use a mail system / client that knows how to
send multipart MIME. Sorry for the
This guy on endless_sphere cut one apart and says there is aluminum below
the steel screw part:
Nothing unusual about this - the electrodes are often Cu, and Al.all the
leaves of Al electrodes have to be gather together and clamped somehow.RGw
out side of the cell is a plated stamped metal.
Are you sure the ends are aluminium? Without the screw terminals they are
connected by nickel strips spot welded to the ends, not sure you can spot weld
nickel to aluminium. I think they are plated steel.
-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of via EV
How about a photo or spec sheet to look at? You say Headway, do they only
make on sized and form of cell?
On Tue, Sep 16, 2014 at 11:34 PM, via EV ev@lists.evdl.org wrote:
I'm building up some headway packs.
My understanding is they have aluminum end caps in the bare state, but
when you
] Dissimilar metals on Headyways?
How about a photo or spec sheet to look at? You say Headway, do they only
make on sized and form of cell?
On Tue, Sep 16, 2014 at 11:34 PM, via EV ev@lists.evdl.org wrote:
I'm building up some headway packs.
My understanding is they have aluminum end caps
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