so when will we see an electric car with a REMOVABLE battery pack?

 

So how much would a NiMH battery pack or Li-ion pack weigh that would
give an extremely lightweight electric car- a range of 40 miles?

That way- one could charge 3 or 4 of them with photovoltaics and/or a
wind-electric generator while driving on one pack.


We need an extremely lightweight (aluminum/plastic) vehicle that can go
40mph for city driving commuters. The interior could be well padded for
safety with airbags. Low speed accidents would not cause severe injury-
especially if the accidents involve two lightweight vehicles.


 Heavier gas guzzlers could be ordered to stay in the right lane at
lower speeds (say- 40mph) and that would be ENFORCED!


 Those heavier gas vehicles would go the way of the dinosaurs- a quick
EXTINCTION!

         misterfact@yahoo.com

 

writes:


Let's go optimistic and figure 25 hp in a built-from-scratch EV
to maintain 40 mph (keeps the math  simple). So that's about,
more or less, 20 kilowatts running through the wires, or
a total of 20 kw-hr.

The Honda Insight battery pack, using 120 "D" sized Ni-mh cells,
gives an iniial factory rating of about a kw. But that's
when brand new, and talks about total discharge.

it weighs about 50 pounds. So figure on twice that
capacity, and twice that weight, for a useful kw-hr.

That's 100 pounds for a kw-hr. After running an hour
and using 20 kw-hr, that's 2,000 pounds of cells
to swap in and out.

--
_____________________________________________________
Knowledge may be power, but communications is the key
             dannyb@panix.com
[to foil spammers, my address has been double rot-13 encoded]

 

Your math is way off....

The EV1 had a range over 200 miles per charge on Nimh (@45 mph constant
speed) , and the pack weighed 1100 lbs...and that was a long time ago.

The Solectria Sunrise went 373 miles on a single charge, during the 1996
tour de sol....with (if I recall) 895 lbs of Nimh.

misterfact@yahoo.com writes:

 

beard6801@bellsouth.net wrote:

I'm told that in the real world the EV1 got around 120 miles on the
Nimh batteries. This is still pretty good.


To answer the original posters question, you would figure around
a 90 lbs battery pack to give 40 miles range? I seem to recall
something about UPS loaders not having to handle anything over
50 lbs by themselves so perhaps limiting the packs to 20 miles
each would work better.

Anthony

 



True..the range varies with speed and terrain, at 60mph constant speed the
chart I have drops down to 160 miles per charge, and a drive cycle range
(not sure what drive cycle they used) of 140.