Automotive Engineering - March 2023 - BET25

Electreon's technology solution has 19 patents covering various
proprietary aspects, including the engineered system architecture
and the communication mechanism between an EV fitted
with a power receiver and the embedded roadway coils. " The
intellectual property of our vehicle receivers will be released to
OEMs for free, " Ezer promised.
Both the battery size and the number of receivers connected
to an EV influence the charging time. " The driving speed
has a negligible effect on the charging performance, " Ezer
explained. He said to date, Electreon has tested its receivers
up to a speed of 49.7 mph (80 kph). As an example, if a commercial
truck with five receivers is traveling at 37 mph (60
kph), 37 miles (60 km) of electrified road is needed to fully
charge the battery. If the vehicle is traveling at 12.4 mph (20
kph), 12.4 miles (20 km) of electrified road are needed to fully
charge the battery.
Larger vehicles can support multiple Electreon receivers. For
instance, Class 8 trucks can be fitted with up to seven undercarriage
receivers. Buses could have three receivers, while passenger
vans might have two receivers. " The number of receivers on
an electric vehicle depends on the use case, the vehicle size, and
the vehicle type, " Ezer said. Each Electreon receiver for heavyduty
EVs is capable of supplying up to 25 kW to the battery.
Based on the power transfer rate requirements of light-duty
passenger EVs, Electreon offers 7 kW and 11 kW receiver options.
Michele Mueller, MDOT Senior Project Manager for connected
and automated vehicles, said that electrified roadways could
accelerate the adoption of EVs by enabling continuous vehicle
operation via safe and sustainable public street energy platforms.
" A wireless in-road charging system will be revolutionary for EVs
by potentially extending an EV's battery charge without having to
stop (and plug-in), " Mueller said. She added that electrified roadways
also could reduce EV range anxiety.
Four-Season Testing
The Detroit demonstration project will provide a four-season
venue to test hardware and performance objectives. Electreon's
Tongur said that based on findings from ongoing projects in
Europe, weather won't be an issue. " Since the (wireless) infrastructure
lies beneath the roadway, the energy transfer is not
affected by snow and ice. The road can be maintained - plowed,
salted, etc. - as usual without affecting the coils beneath the
asphalt, " Tongur said.
Wireless charging of EVs isn't new to America, as the largest
fleet of all-electric transit buses in the U.S. use a patented
wireless charging system from Salt Lake City, Utah-based
WAVE (Wireless Advanced Vehicle Electrification). Forty-eight
of Southern California's Antelope Valley Transit Authority's 54
BYD-built buses are fitted with WAVE undercarriage receivers.
Those WAVE-compatible electric buses use wireless charging
depots located within a 100 square-mile (260 km) area.
This article was written by Kami Buchholz, an automotive
journalist and longstanding contributor to the SAE Media Group,
who specializes in a wide spectrum of technology coverage for
the automotive and commercial-vehicle industries. For more
information, visit www.mobilityengineeringtech.com. 
Battery & Electrification Technology, March 2023
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