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 Post subject: Trailer range extender
PostPosted: Sun Mar 01, 2015 12:14 am 
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Joined: Thu Dec 27, 2012 10:55 pm
Posts: 606
Seen it before, but it seems they are getting serious

Quote:
A total of 85kWh worth of batteries are nestled into the aerodynamic egg-shaped trailer. They claim that, along with your car's original batteries, you can have 300 miles of range.


http://carswithcords.blogspot.com/2015/02/tesla-class-range-extender-for-nissan.html?m=1

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 Post subject: Re: Trailer range extender
PostPosted: Sun Mar 01, 2015 8:51 pm 
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Joined: Wed Nov 14, 2012 9:50 pm
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Location: San Diego
This is a financial train wreck. I recommend a natural gas generator or fuel cell.

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 Post subject: Re: Trailer range extender
PostPosted: Mon Mar 02, 2015 5:55 am 
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Joined: Thu Jan 17, 2013 11:13 pm
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Location: Los Altos, CA
...not to mention the modification of the vehicle to allow direct DC connection from trailer battery to the main traction battery in the car.

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 Post subject: Re: Trailer range extender
PostPosted: Mon Mar 02, 2015 6:20 am 
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Joined: Sun Sep 01, 2013 7:13 pm
Posts: 110
Location: Berkeley, CA
Could someone build a portable generator specifically to plug into a DC charge port?


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 Post subject: Re: Trailer range extender
PostPosted: Mon Mar 02, 2015 7:55 pm 
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Joined: Wed Nov 14, 2012 9:50 pm
Posts: 4115
Location: San Diego
Tadol wrote:
Could someone build a portable generator specifically to plug into a DC charge port?



Sure, why not?

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Tony Williams
QC Charge
1780-104 La Costa Meadows Drive
San Marcos, California 92078 USA
tony@QCcharge.com
www.QCcharge.com
Twitter: QCPower
1-844-EV-PARTS
1-844-387-2787
1-760-798-0342 Office
Hours M-F, 9-5 Pacific Time


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 Post subject: Re: Trailer range extender
PostPosted: Mon Mar 02, 2015 7:59 pm 
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Joined: Thu Jan 17, 2013 11:13 pm
Posts: 1839
Location: Los Altos, CA
Tadol wrote:
Could someone build a portable generator specifically to plug into a DC charge port?
That's an interesting idea. By doing the rectification directly off of a traditional generator, you would not care about the AC waveform quality. In addition, the DC charge controller could act as a governor to keep the generator at the desired operating point - either the max output or the max efficiency of the engine.

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 Post subject: Re: Trailer range extender
PostPosted: Mon Mar 02, 2015 8:37 pm 
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Joined: Thu Dec 27, 2012 10:55 pm
Posts: 606
miimura wrote:
Tadol wrote:
Could someone build a portable generator specifically to plug into a DC charge port?
That's an interesting idea. By doing the rectification directly off of a traditional generator, you would not care about the AC waveform quality. In addition, the DC charge controller could act as a governor to keep the generator at the desired operating point - either the max output or the max efficiency of the engine.


But how many will be produced with these specs ? Imho not enough to make it profitable.
Better to have a "conventional" generator that produces 240/270 volt, xxx amps with a solution like the tesla super chargers of X 10kW chargers in parallel to convert the energy of the generator to what the battery pack wants.
In order to make such a solution universal, it would need to be able to be used by all BEV's and most of the models have different battery setup/voltages. That is why a chademo setup wouldn't be a setup in my mind.
The only thing what I would be worried about and something they omitted from the sketches of the trailer is the beefy cable/connector that goes with it.
The "artist impressions" show no cables at all.
I don't see a cable to the front of a leaf and drive with the bonnet open. So it would mean extra hardware somewhere in the back.
Let's wait until they have a real product

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 Post subject: Re: Trailer range extender
PostPosted: Mon Mar 02, 2015 9:42 pm 
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Joined: Mon Feb 24, 2014 8:51 pm
Posts: 631
Tadol wrote:
Could someone build a portable generator specifically to plug into a DC charge port?

What do you mean by portable? Honda 2000 is what I call portable and is good for L1 only.
Otherwise a 60kw generator and equipment is going to be rather large.


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 Post subject: Re: Trailer range extender
PostPosted: Mon Mar 02, 2015 11:38 pm 
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Joined: Sat Mar 30, 2013 9:20 am
Posts: 694
Location: Seal Beach, CA
Obligatory link to Phil's 30 kW Capstone turbine trailer.

Image

EDIT: Better (forum) link.

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 Post subject: Re: Trailer range extender
PostPosted: Tue Mar 03, 2015 5:46 am 
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Joined: Sun Sep 01, 2013 7:13 pm
Posts: 110
Location: Berkeley, CA
The only reason I asked is that it seems like if it were possible to make a small generator that only did straight up DC, and eliminated all the other hardware and overhead thats necessary to make a universal 110/220 AC unit, then it could be used as a towable emergency recharge unit, a portable recharge station for EV rallys or meetups in locations that have minimal or no recharging capabilities, or similar. Depending on cost, if it had the ability to also output 12vdc, it could be a great camping / emergency generator for led lighting and such -

I'm not sure what it'd take, but seems like it could be useful -


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