Vehicle Electrification - February 21, 2013 - 9

February 21, 2013

Samsung partnership. The 22-A·h pack is
comprised of 97 cells. It is liquid-cooled to
ensure robust thermal performance in all
markets and to help guarantee the car’s plus80-mi range, Giem explained. Chrysler will
warranty the battery pack for eight years.
Driving the car’s front wheels is an 83-kW
permanent-magnet motor and single-speed
final drive that Fiat has named “e-Drive.” The
three-phase synchronous electric machine
generates 147 lb·ft (199 N·m). According to
Giem, the system has 45 kW of total
regenerative capacity. Chrysler engineers
developed the car’s fully blended regen
braking control strategy and included a
“creep” function to better acclimate 500e
customers who are used to the low-speed
feel of torque-converter-equipped automatic
transmissions.
The system is engineered with an auxiliary
power module, which reduces the battery’s
high-voltage output to 12 V to support the
standard vehicle electrical system.
There are two cooling system loops—one
for the battery pack and one for the
passenger cabin. The battery thermalmanagement system, in addition to
maintaining optimal operating temperatures
for the high-voltage system, also incorporates
supplemental passive cooling. Using the car’s
brazed aluminum radiator, the system is
configured to remove heat from the ethylene
glycol-based coolant as air enters the front of
the vehicle. The radiator also provides cooling
benefits for the eDrive motor and the power
inverter.
There is a high-voltage heating core for the
interior. Giem said users can expect a 10%
reduction of driving range on a cold day with
the cabin heater turned on. The vehicle
features remote battery preconditioning
capability through a smartphone app.
SAE Vehicle Electrification evsae.com

New front and rear fascias, road wheels, rear
spoiler, underbody fairings, and other
aerodynamic improvements resulted in 24
counts of drag reduced on the 500e, compared
with the conventional 500. Claimed Cd is .311.
But the car gained more than 600 lb (272 kg)
compared with the base non-EV model.

Architected for J1772 quick-charge
The 500e program was launched in 2010. An
initial fleet of 40 mules grew to the current
100-car test fleet. The program was virtually
in parallel to SAE International’s
development of the revised J1772 standard
for quick-charging EVs and PHEVs (go to
www.sae.org/mags/aei/11484 to read more
on the updated standard). The revision
accommodates dc charging (previously
known as Level 3) in addition to ac Levels 1
and 2 and features the new “combo
connector” hardware that experts believe will
dramatically reduce charging time for vehicles
so equipped.
“The car is technically and architecturally
prepared for the new SAE J1772 Level 3
quick charging, but we just timed out on the
first-phase launch so we’re using Level 2 [240
V] hardware at launch,” Giem told SAE
Magazines. He said upgrading the car to
quick-charge capability, to be compatible

9
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Vehicle Electrification - February 21, 2013

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