(Last of) The GM battery Electric Vehicles
My primary method of transportation is a 1998 Chevrolet S10E electric
truck, configuredwith an Ovonic NiMH battery pack.
The S10E is based entirely on the Gen1 EV1 drivetrain, and it is very
practical for local (75miles or less) driving requirements.
Although GM has removed all the EV1's from public use following their
lease expirations, some of the Chevrolet S10E trucks were sold to
local
electric power utilities and various state governments in 97-99 as
fleet vehicles. A small number of them were eventually retired from
service and
offered for sale or auction to individuals. There are approximately
50 (estimated) privately titled S-10E trucks now in use today. Most having
PbA
(lead acid) battery packs, and a rare few escaped destruction with
NiMH batteries. Not surprisingly, these trucks will usually
fetch over $20,000
when privately resold later on. Aside from the equally popular Toyota
RAV-4 EV, there are few production EV's still in daily use on our highways.
The Chevrolet S-10EV truck may appear almost identical to it's gasoline
powered sibling. But it is radically different beneath the external skin.
For starters; the S10E is front wheel drive, versus the rear wheel
drive of the normal S10. Torsion bar suspension supports the front end,
while extra heavy duty leaf springs carry the rear. The toughened suspension
components are needed in order to support a 4300lb mid-size
truck containing a battery payload nearing 1800lbs for the PbA verison,
and 1600lbs for the NiMH version.
GM designed the battery box to mount under the frame, beneath the bed,
allowing full use for cargo purposes. The low center of gravity
makes for excellent handling characteristics too.
There are 26 85Ah NiMH batteries in the box, with half being stacked to
reduce the size.
Nominal battery pack voltage is 400 VDC. And when fully charged, the pack
contains 29KWh of energy. Roughly equivalent to 1/2 gallon of gas.
As mentioned earlier, the S10E uses the EV1 drive components. The motor
is an AC 3 phase drive, delivering 137 hp via the 100kw drive
Inverter. The Inverter converts the high voltage DC into high current
AC to power the motor. An image of the Inverter module is shown here
In spite of the considerable weight, these electric trucks can easily
out-accelerate the average SUV from a stop (but at a direct penalty to
range).
The EV1 AC drive system can deliver nearly all of the rated horsepower
at zero RPM, whereas a gasoline engine requires high engine RPM to
achieve it's rated horsepower. The S-10E top speed is electronically
limited to a little over 70 MPH to conserve battery power and overall range.
The S10E includes all of the usual features you would normally expect.
Power steering is driven by a small 3 phase AC motor, as is the heating
and cooling system. It is actually a heat pump, similar
to what you might have in your home, but on a smaller scale. An electric
vacuum pump
powers the brake system. GM maintained the vacuum brake approach to
eliminate the need in redesigning their four wheel ABS braking system.
Charging is accomplished by an inductive paddle via the Magnecharger
charging system. Ours is a wall mount appliance placed on the garage
wall,
and powered by 220V single phase AC. The charger can deliver 6kW of
energy to the battery pack, providing a full charge in only a few hours
time.
There are a few of these rare Chevrolet S-10EV trucks available for
sale from EV Bones LLC. Click on the
name to be directed to their web site.
Return
to the Nixie Clock and Nixie Wristwatch site