Automotive Engineering - March 2023 - BET22

Advancing Higher Speeds
and New Techniques
for EV Recharging
Two new initiatives address methods to make EV charging faster
- or require no " downtime " at all.
T
he ability to charge electric vehicles at a very
fast rate is a key to electrifying mobility across
the U.S. It's a focus of the U.S. Dept. of Energy's
Extreme Fast Charger project, whose potential
was demonstrated convincingly on a production
GMC Hummer EV at the American Center for
Mobility (ACM) in Ypsilanti, MI, last fall.
The Hummer EV observed by SAE Media featured an 800volt
electrical architecture - considered state-of-the-art for
DC " extreme fast " charging. Both GM and Delta Electronics
(Americas) Ltd., which provided the charging system, are partnering
with DoE on the program. The results of the demonstration
were " phenomenal, " said Jim Khoury, Senior Manager
of Global Electrification at GM.
The parameters for the extreme fast charger were established
in an earlier test that also involved a Hummer EV. That test, spanning
nine minutes at 500 amps at an average 725 volts, yielded
nearly 55 kWh before the EV's battery started to limit the current.
" While other DC fast chargers can also charge at 500 amps, the
power capability is lower, so it power-limits sooner in the charge
cycle. Our power limit is 400 kW, " said Dr. Charles Zhu, VP of the
Automotive Business Group for Delta Electronics, and the Principal
Investigator for the DoE project. He said that generally, the Delta
extreme fast charging system can deliver 66.7 kWh in 10 minutes.
22
Battery & Electrification Technology, March 2023
Suwin/Shutterstock.com

Automotive Engineering - March 2023

Table of Contents for the Digital Edition of Automotive Engineering - March 2023

Automotive Engineering - March 2023 - INTRO1
Automotive Engineering - March 2023 - SPONSOR1
Automotive Engineering - March 2023 - CVR1
Automotive Engineering - March 2023 - CVR2
Automotive Engineering - March 2023 - 1
Automotive Engineering - March 2023 - 2
Automotive Engineering - March 2023 - 3
Automotive Engineering - March 2023 - 3A
Automotive Engineering - March 2023 - 3B
Automotive Engineering - March 2023 - 4
Automotive Engineering - March 2023 - 5
Automotive Engineering - March 2023 - 6
Automotive Engineering - March 2023 - 7
Automotive Engineering - March 2023 - 8
Automotive Engineering - March 2023 - 9
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Automotive Engineering - March 2023 - 20
Automotive Engineering - March 2023 - 21
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Automotive Engineering - March 2023 - 29
Automotive Engineering - March 2023 - 30
Automotive Engineering - March 2023 - 31
Automotive Engineering - March 2023 - 32
Automotive Engineering - March 2023 - 33
Automotive Engineering - March 2023 - CVR4
Automotive Engineering - March 2023 - BETCVRA
Automotive Engineering - March 2023 - BETCVRB
Automotive Engineering - March 2023 - BETCVR1
Automotive Engineering - March 2023 - BETCVR2
Automotive Engineering - March 2023 - BET1
Automotive Engineering - March 2023 - BET2
Automotive Engineering - March 2023 - BET3
Automotive Engineering - March 2023 - BET4
Automotive Engineering - March 2023 - BET5
Automotive Engineering - March 2023 - BET6
Automotive Engineering - March 2023 - BET7
Automotive Engineering - March 2023 - BET8
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Automotive Engineering - March 2023 - BET10
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Automotive Engineering - March 2023 - BET19
Automotive Engineering - March 2023 - BET20
Automotive Engineering - March 2023 - BET21
Automotive Engineering - March 2023 - BET22
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Automotive Engineering - March 2023 - BET24
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Automotive Engineering - March 2023 - BET26
Automotive Engineering - March 2023 - BET27
Automotive Engineering - March 2023 - BET28
Automotive Engineering - March 2023 - BET29
Automotive Engineering - March 2023 - BET30
Automotive Engineering - March 2023 - BET31
Automotive Engineering - March 2023 - BET32
Automotive Engineering - March 2023 - BET33
Automotive Engineering - March 2023 - BET34
Automotive Engineering - March 2023 - BETCVR3
Automotive Engineering - March 2023 - BETCVR4
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