# where can I buy an elec. car that... - Page 7

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Posted by Scott on May 17, 2009, 2:38 am

On Sat, 16 May 2009 19:55:46 +0100, in alt.energy.homepower, Eeyore

http://engineeringtv.com/blogs/etv/archive/2009/03/10/byd-e6-pure-electric-vehicle.aspx

recharge it !

Oh, do tell!  Share with us your calculations.  I'm especially interested to
learn what a 3-phase AC power supply does for charging DC batteries that a
single-phase AC supply cannot.

Posted by clare on May 17, 2009, 3:39 am

On Sun, 17 May 2009 02:38:04 GMT, nobody@xmission.com (Scott) wrote:

http://engineeringtv.com/blogs/etv/archive/2009/03/10/byd-e6-pure-electric-vehicle.aspx

recharge it !

Higher voltage at lower current. Generally 240 volt single phase is
about all you can get. 3 phase 550 is common, meaning primary current
on the charger is reduced by over half.

Posted by Eeyore on May 17, 2009, 11:43 am

clare@snyder.on.ca wrote:

wrote:

http://engineeringtv.com/blogs/etv/archive/2009/03/10/byd-e6-pure-electric-vehicle.aspx

recharge it !

Normally higher current as well. Which helps total power delivery too.

Graham

Posted by Eeyore on May 17, 2009, 11:41 am

Scott wrote:

wrote:

http://engineeringtv.com/blogs/etv/archive/2009/03/10/byd-e6-pure-electric-vehicle.aspx

recharge it !

Supply more power. Don't you even know that ?

I'd have to re-do the calculations but even for a compactish car, 250 mi over an
average
driving regime is likely to require some 50kWh minimum ( I'm probably being
generous to you
here ).

A US 120V 15A socket can supply 1.8 kW. So to recharge the battery from flat
would take 50/1.8
hours = ~ 28 hours. Not very practical I think you'll agree.

Graham

Posted by residualselfimage1999 on May 17, 2009, 1:10 pm
wrote:

com> wrote:

You computered 50kWh because today's gas/diesel cars are way
too heavy that you need a massive amounts of power to move them.

Suppose the EV had a gross curb weight of about 900 lbs
(with 400 lbs of that weight being used by 10 40 lbs battery
units and  80 lbs for the electric motor/CVT ) and the vehicle
had a wind resistance of about .20 then I would expect
that your power requirement would be less.

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