Re: [EVDL] Tesla accepting CCS

[Evan Tuer via EV]

I fully agree.  Even the "Euro" Tesla high power connector would have been
preferable to CCS combo-2.  The engineers did a great job on both.
Tesla management could have capitalised on that 10 years ago, but did not.


On Thu, Dec 15, 2022 at 9:16 PM (-Phil-) via EV  wrote:

> Having a lot of experience with all 3 connectors and being an Electrical
> Engineer, I have to say Tesla's connector is superior to CCS or CHAdeMO.
> It's more rugged, cheaper to manufacture, and uses less space and
> materials.   If Tesla had "opened" its standard before CCS was ratified,
> then maybe they would have had a chance at being a standard.
>
> Too little too late.  Now Tesla is going to have to add the clunky CCS
> connectors to its network at considerable expense.
>
> On Thu, Dec 15, 2022 at 7:09 PM John Lussmyer via EV 
> wrote:
>
> > On 12/15/2022 6:12 PM, EV List Lackey via EV wrote:
> > > On 15 Dec 2022 at 11:23, Evan Tuer via EV wrote:
> > >
> > >> I know that they are trying to get the Tesla plug legislated as the US
> > >> standard but that's inevitably going to fail and seems rather bad
> faith.
> > > Oh great.  That's much like what GM did with the EV1 inductive paddle.
> > What
> > > a dead end that was.
> > The one thing is that the Tesla plug can handle more current, and is
> > easier for the end user.
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Re: [EVDL] Sticky EV Problem

[(-Phil-) via EV]

Yeah, I've seen this happen, but usually it indicates something got pretty
hot.  Is your system sized properly, and you should always use belleville
washers on high-current carrying terminations.  With temperature rise, the
bolt/stud can lengthen which will reduce torque and increase resistance.
Also, With repeated cycling it can loosen.

NEVER use split washers
https://www.ecmweb.com/content/article/20890080/how-to-use-belleville-washers-correctly

On Fri, Dec 16, 2022 at 7:39 AM Tom Jones via EV  wrote:

> Thanks Cor,
> That reminded me that the only time I have used "Marine grade" heat
> shrink was in that box. That tubing does have an adhesive lining. That
> must have been what migrated.
> Tom
>
> On 12/15/2022 8:01 PM, Cor van de Water via EV wrote:
> > Tom,
> > Did you use heatshrink on the cables?
> > I know of many types of Heat Shrink that has heat activated glue
> > inside to adhere to the cable it is crimped onto, maybe that glue
> > migrated to the wire strands?
> > Alternatively, maybe the cable insulation expelled something, possibly
> > under high temp, which then dried on the connections?
> > Cor.
> >
> > On Thu, Dec 15, 2022 at 2:10 PM Tom Jones via EV 
> wrote:
> >> I have a conversion that has been on the road since 2009. It has a Zilla
> >> 1kLV and a Warp9 for propulsion. The traction pack consists of 44 CALB
> >> 180 Ah cells for about 150 volts.
> >>
> >> The Zilla, hairball, two contactors, breaker and a shunt have been in an
> >> aluminum box for all those years. I recently had reason to open the box
> >> and check connections and see if there was anything going wrong. The box
> >> is not water tight but the contents were dry and generally very clean,
> >> there were no signs of any problems.
> >>
> >> When I took apart some of the high current connections, I found them to
> >> be covered with a very sticky clear film. That film was very hard to
> >> remove. Acetone and a lot of rubbing did a fair job of cleaning the
> >> contacts. But, it was not easy. Only the high current contacts had this
> >> problem. Inside the box, no other surface had the sticky film.
> >>
> >> So, here is my question, does anyone on this list have any idea about
> >> how that sticky film developed? Or, has anyone else ever seen this
> issue?
> >>
> >> Tom Jones
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Re: [EVDL] Sticky EV Problem

[Tom Jones via EV]

Thanks Cor,
That reminded me that the only time I have used "Marine grade" heat 
shrink was in that box. That tubing does have an adhesive lining. That 
must have been what migrated.

Tom

On 12/15/2022 8:01 PM, Cor van de Water via EV wrote:

Tom,
Did you use heatshrink on the cables?
I know of many types of Heat Shrink that has heat activated glue
inside to adhere to the cable it is crimped onto, maybe that glue
migrated to the wire strands?
Alternatively, maybe the cable insulation expelled something, possibly
under high temp, which then dried on the connections?
Cor.

On Thu, Dec 15, 2022 at 2:10 PM Tom Jones via EV  wrote:

I have a conversion that has been on the road since 2009. It has a Zilla
1kLV and a Warp9 for propulsion. The traction pack consists of 44 CALB
180 Ah cells for about 150 volts.

The Zilla, hairball, two contactors, breaker and a shunt have been in an
aluminum box for all those years. I recently had reason to open the box
and check connections and see if there was anything going wrong. The box
is not water tight but the contents were dry and generally very clean,
there were no signs of any problems.

When I took apart some of the high current connections, I found them to
be covered with a very sticky clear film. That film was very hard to
remove. Acetone and a lot of rubbing did a fair job of cleaning the
contacts. But, it was not easy. Only the high current contacts had this
problem. Inside the box, no other surface had the sticky film.

So, here is my question, does anyone on this list have any idea about
how that sticky film developed? Or, has anyone else ever seen this issue?

Tom Jones
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