Re: [EVDL] Ground Faults
When I had a lead pack in my truck I had rampant leakage from the pack to the frame. I think the acid mist and dirt are conductive. I kept trying to find the culprit battery by segmenting the pack and the leak would literally just move around. And I had the same problem as you--it was tripping the GFCI outlet. I had to take out the GFCI outlet and install a regular one. (The truck had a 110v Russco charger in it). I don't think LiFePo4 cells are as susceptible although I have heard several stories of different makes having conductive cases. When I put lithium in the truck put all the cells in insulated boxes. If I have a ground fault now it will most likely be carbon buildup in the motor. --Rick On 6/1/2016 11:48 PM, John Lussmyer via EV wrote: I mean EVERYTYHING other than the charger. There are contactors on both sides of the pack, so the controller and motor are fully disconnected. I also disconnected the volt/amp meter, and BMS (12v power) as well. Also disconnected the "battery +" wire to the zilla hairball. Unhooked the DC-DC. I'm wondering if I'm getting dirt/damp leakage from the pack to the frame. On Wed Jun 01 18:08:15 PDT 2016 ev@lists.evdl.org said: Could you be a little more detailed? You disconnected everything from what? Each other? The battery pack? Etc? If you have a series wound DC motor then carbon build up from the brushes can create a path. Sent from my Verizon, Samsung Galaxy smartphone Original message From: John Lussmyer via EV <ev@lists.evdl.org> Date: 6/1/16 7:35 PM (GMT-06:00) To: Electric Vehicle Discussion List <ev@lists.evdl.org> Subject: [EVDL] Ground Faults Well, I've discovered that my truck has a ground fault of some kind in it somewhere. For a long time, I've been charging off the Welder outlet in my shop. I recently installed a nice big 240v 60A GFCI breaker for a charging outlet at the house. The GFCI trips every time I try to charge. It doesn't trip if I plug a welder into the outlet. Poking around the pack with a voltmeter, I get some solid voltage readings to the frame of the truck. So, I started disconnecting things. Disconnected everything except the charger (kinda need that!). Still trips the GFCI. Still getting weak voltage readings from various points in the pack. (Not always consistent, not always constant.) Running out of ideas... -- Worlds only All Electric F-250 truck! http://john.casadelgato.com/Electric-Vehicles/1995-Ford-F-250 ___ 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/20160601/796e9785/attachment.htm> -- Worlds only All Electric F-250 truck! http://john.casadelgato.com/Electric-Vehicles/1995-Ford-F-250 ___ 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) ___ 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)
Re: [EVDL] Ground Faults
I mean EVERYTYHING other than the charger. There are contactors on both sides of the pack, so the controller and motor are fully disconnected. I also disconnected the volt/amp meter, and BMS (12v power) as well. Also disconnected the "battery +" wire to the zilla hairball. Unhooked the DC-DC. I'm wondering if I'm getting dirt/damp leakage from the pack to the frame. On Wed Jun 01 18:08:15 PDT 2016 ev@lists.evdl.org said: >Could you be a little more detailed? You disconnected everything from what? >Each other? The battery pack? Etc? If you have a series wound DC motor then >carbon build up from the brushes can create a path. > >Sent from my Verizon, Samsung Galaxy smartphone > Original message From: John Lussmyer via EV ><ev@lists.evdl.org> Date: 6/1/16 7:35 PM (GMT-06:00) To: Electric Vehicle >Discussion List <ev@lists.evdl.org> Subject: [EVDL] Ground Faults >Well, I've discovered that my truck has a ground fault of some kind in it >somewhere. >For a long time, I've been charging off the Welder outlet in my shop. I >recently installed a nice big 240v 60A GFCI breaker for a charging outlet at >the house. >The GFCI trips every time I try to charge. It doesn't trip if I plug a welder >into the outlet. > >Poking around the pack with a voltmeter, I get some solid voltage readings to >the frame of the truck. >So, I started disconnecting things. Disconnected everything except the >charger (kinda need that!). >Still trips the GFCI. >Still getting weak voltage readings from various points in the pack. (Not >always consistent, not always constant.) > >Running out of ideas... > >-- >Worlds only All Electric F-250 truck! >http://john.casadelgato.com/Electric-Vehicles/1995-Ford-F-250 >___ >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/20160601/796e9785/attachment.htm> -- Worlds only All Electric F-250 truck! http://john.casadelgato.com/Electric-Vehicles/1995-Ford-F-250 ___ 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)
Re: [EVDL] Ground Faults
Could you be a little more detailed? You disconnected everything from what? Each other? The battery pack? Etc? If you have a series wound DC motor then carbon build up from the brushes can create a path. Sent from my Verizon, Samsung Galaxy smartphone Original message From: John Lussmyer via EV <ev@lists.evdl.org> Date: 6/1/16 7:35 PM (GMT-06:00) To: Electric Vehicle Discussion List <ev@lists.evdl.org> Subject: [EVDL] Ground Faults Well, I've discovered that my truck has a ground fault of some kind in it somewhere. For a long time, I've been charging off the Welder outlet in my shop. I recently installed a nice big 240v 60A GFCI breaker for a charging outlet at the house. The GFCI trips every time I try to charge. It doesn't trip if I plug a welder into the outlet. Poking around the pack with a voltmeter, I get some solid voltage readings to the frame of the truck. So, I started disconnecting things. Disconnected everything except the charger (kinda need that!). Still trips the GFCI. Still getting weak voltage readings from various points in the pack. (Not always consistent, not always constant.) Running out of ideas... -- Worlds only All Electric F-250 truck! http://john.casadelgato.com/Electric-Vehicles/1995-Ford-F-250 ___ 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/20160601/796e9785/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)
[EVDL] Ground Faults
Well, I've discovered that my truck has a ground fault of some kind in it somewhere. For a long time, I've been charging off the Welder outlet in my shop. I recently installed a nice big 240v 60A GFCI breaker for a charging outlet at the house. The GFCI trips every time I try to charge. It doesn't trip if I plug a welder into the outlet. Poking around the pack with a voltmeter, I get some solid voltage readings to the frame of the truck. So, I started disconnecting things. Disconnected everything except the charger (kinda need that!). Still trips the GFCI. Still getting weak voltage readings from various points in the pack. (Not always consistent, not always constant.) Running out of ideas... -- Worlds only All Electric F-250 truck! http://john.casadelgato.com/Electric-Vehicles/1995-Ford-F-250 ___ 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)
[EVDL] EVLN: EV-newswire posts for 20160601
http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-SilentHawk-Electric-stealth-motorcycle-gt-no-louder-than-brushing-one-s-teeth-td4682309.html
EVLN: SilentHawk Electric stealth motorcycle> no louder than brushing one’s
teeth
The military's stealth motorcycles are as quiet as an electric toothbrush
...
... The military is funding stealth motorcycles, which would allow riders
to ... The motorcycles operate at 55 decibels — about the level of an
electric toothbrush or typical ...
http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-Minnesota-s-First-Electric-Tuk-Tuk-Service-Arrives-in-Downtown-Stillwater-td4682310.html
EVLN: Minnesota’s First Electric Tuk-Tuk Service Arrives in Downtown
Stillwater
Minnesota's First Electric Tuk-Tuk Service Arrives ...
Minnesota's first three-wheeled electric tuk-tuk arrived at 11:22 a.m. on
May 22 ... then made its way downtown ...
http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-No-wonder-the-Koch-brothers-are-worried-enough-to-fund-anti-EV-scientists-td4682311.html
EVLN: No wonder the Koch brothers are worried ... enough to fund anti-EV
scientists
Will GM Be an Unlikely Hero in the Kochs’ War on Electrics?
... Foremost among those opposing the growth of EVs are Charles and David
Koch. The petroleum industry billionaires have well-known anti-environmental
credentials ...
http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-Creepy-scary-trim-sexy-Soul-EV-spokesrodents-out-gt-plump-fuzzy-hamsters-are-back-v-td4682312.html
EVLN: Creepy-scary trim-sexy Soul EV spokesrodents out> plump-fuzzy hamsters
are back (v)
Watch the Kia Soul hamsters take on 'Dueling Banjos'
The Kia Soul hamsters are back, they're plump, and they're turning an old
... party tunes of LMFAO ... Kia has included a three-minute,
behind-the-scenes video called Soul ...
http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-Experience-a-Tesla-S-EV-autopilot-crash-v-td4682313.html
EVLN: Experience a Tesla-S EV autopilot crash (v)
What it looks like when your Tesla S crashes on autopilot
... stranger stories of autopilot shenanigans, like a guy sleeping in his
car while ...
http://evdl.org/evln/
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[EVDL] EVLN: SilentHawk Electric stealth motorcycle> no louder than e-brushing one’s teeth
https://www.washingtonpost.com/news/innovations/wp/2016/05/27/the-militarys-stealth-motorcycles-are-as-quiet-as-an-electric-toothbrush/
The military’s stealth motorcycles are as quiet as an electric toothbrush
May 27 2016 Matt McFarland
[images
https://img.washingtonpost.com/wp-apps/imrs.php?src=https://img.washingtonpost.com/blogs/innovations/files/2016/05/SilentHawk4.jpg=1484
(SilentHawk)
https://img.washingtonpost.com/blogs/innovations/files/2016/05/qe34yq34y3q4y3q.jpg
The SilentHawk is one of the quiet motorcycles being developed on behalf of
the military. (Logos Technologies)
]
The military is funding stealth motorcycles, which would allow riders to
quickly sneak up on unsuspecting enemies.
The motorcycles operate at 55 decibels — about the level of an electric
toothbrush or typical conversation — yet still can reach 80 mph in speed.
The extreme quiet is due to the use of electric motors.
The motorcycles also feature two-wheel drive to improve traction on gravel,
sand or any challenging terrain. The narrow dimensions of the motorcycles
allow them to be driven in forests or other places some military vehicles
can’t go.
“With a skilled rider you can get basically anywhere on the planet,” said
Alex Dzwill, the lead engineer for one of the motorcycles, the SilentHawk,
from defense contractor Logos Technologies.
The electric motors have limited range — the SilentHawk lasts two hours and
the other bike, NightMare, has 60 miles of power. So the motorcycles are
modified with hybrid engines that can burn almost any type of fuel, such as
gasoline, jet fuel, kerosene or diesel.
“Out on a mission you’re not always going to have premium gasoline from the
Shell station. You’ll be driving through hazardous terrains in different
territories,” Dzwill said.
The thinking is these hybrid engines, which are about as loud as a vacuum
cleaner, can be used on the part of a mission where being quiet isn’t
essential. Using the back-up engine increases the SilentHawk’s range to 170
miles.
Logos Technologies showed off a prototype of the quiet motorcycle at a
defense industry trade show this week along with LSA Autonomy, the maker of
the Nightmare.
Both are still demonstrating and testing the technology for the Defense
Advanced Research Projects Agency, which will decide if it wants to continue
developing the motorcycles.
Both companies said it’s too early to make any estimates about how much the
motorcycles would cost once in production.
If the motorcycles are ever adapted for civilians, one possible use would be
providing commuters with a quiet way to ride to work. According to Dzwill,
the hybrid engine could then be turned on while the motorcycle is parked,
which will recharge the battery and allow for a commute home that’s no
louder than brushing one’s teeth.
[© 2016 The Washington Post]
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