Tech Briefs Magazine - March 2023 - BET-22

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

Tech Briefs Magazine - March 2023

Table of Contents for the Digital Edition of Tech Briefs Magazine - March 2023

Tech Briefs Magazine - March 2023 - Intro
Tech Briefs Magazine - March 2023 - Sponsor
Tech Briefs Magazine - March 2023 - Cov1
Tech Briefs Magazine - March 2023 - Cov2
Tech Briefs Magazine - March 2023 - 1
Tech Briefs Magazine - March 2023 - 2
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Tech Briefs Magazine - March 2023 - 48
Tech Briefs Magazine - March 2023 - Cov3
Tech Briefs Magazine - March 2023 - Cov4
Tech Briefs Magazine - March 2023 - BET-Cov1A
Tech Briefs Magazine - March 2023 - BET-Cov1B
Tech Briefs Magazine - March 2023 - BET-Cov1
Tech Briefs Magazine - March 2023 - BET-Cov2
Tech Briefs Magazine - March 2023 - BET-1
Tech Briefs Magazine - March 2023 - BET-2
Tech Briefs Magazine - March 2023 - BET-3
Tech Briefs Magazine - March 2023 - BET-4
Tech Briefs Magazine - March 2023 - BET-5
Tech Briefs Magazine - March 2023 - BET-6
Tech Briefs Magazine - March 2023 - BET-7
Tech Briefs Magazine - March 2023 - BET-8
Tech Briefs Magazine - March 2023 - BET-9
Tech Briefs Magazine - March 2023 - BET-10
Tech Briefs Magazine - March 2023 - BET-11
Tech Briefs Magazine - March 2023 - BET-12
Tech Briefs Magazine - March 2023 - BET-13
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Tech Briefs Magazine - March 2023 - BET-17
Tech Briefs Magazine - March 2023 - BET-18
Tech Briefs Magazine - March 2023 - BET-19
Tech Briefs Magazine - March 2023 - BET-20
Tech Briefs Magazine - March 2023 - BET-21
Tech Briefs Magazine - March 2023 - BET-22
Tech Briefs Magazine - March 2023 - BET-23
Tech Briefs Magazine - March 2023 - BET-24
Tech Briefs Magazine - March 2023 - BET-25
Tech Briefs Magazine - March 2023 - BET-26
Tech Briefs Magazine - March 2023 - BET-27
Tech Briefs Magazine - March 2023 - BET-28
Tech Briefs Magazine - March 2023 - BET-29
Tech Briefs Magazine - March 2023 - BET-30
Tech Briefs Magazine - March 2023 - BET-31
Tech Briefs Magazine - March 2023 - BET-32
Tech Briefs Magazine - March 2023 - BET-33
Tech Briefs Magazine - March 2023 - BET-34
Tech Briefs Magazine - March 2023 - BET-Cov3
Tech Briefs Magazine - March 2023 - BET-Cov4
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