SAE Update - July 2022 - 29

STANDARDS &
cOMMITTEES
voltage support for black start
and other resiliency based
scenarios. SAE J3271/5 covers
compliance and interoperability.
SAE AIR7357 is a similar
SAE J3271 MCS connector.
charging standards with the intent of creating
standards in parallel with industry led discussions of
requirements. The white paper of MCS specifications
is due to be released in summer of 2022.
SAE International's Hybrid-EV Committee's
Megawatt Charging System Task Force was formed in
2021. Its first Work in Progress (WiP) is J3271:
Megawatt Charging System for Electric Vehicles. It is a
system level standard that covers the charging
equipment and control elements from the point of
utility interconnection to the vehicle battery terminals.
It leverages other standards that are under
development, such as IEC TS63379 which just covers
the MCS coupler/inlet. The three charging levels, tied
to cooling methods are; Level 1 non-cooled connector/
inlet, Level 2 cooled connector + non-cooled inlet,
Level 3 cooled connector and cooled inlet. The coupler
is designed for 1500v/3000A peak operation. The SAE
J3271/2 Technical Information Reference (TIR)
document includes three physical layer communication
methods- CAN, PLC, and 10BaseT1S Ethernet.
Cord handling and automated connection systems
are covered in J3271 section 3. SAE J3271/4 covers
use cases, especially microgrid coupled charging
systems, bi-directional power flow, and auxiliary lowUPDATE
Megawatt
Charging System
standard specifically for electric
aircraft. IEC 60008 covers
existing marine AC shore power
requirements, now leveraging
SAE J3271 content. Rail, mining,
construction, Dept of Defense and
other non-road electric vehicle
application stakeholders are
actively participating in J3271
weekly meetings.
The role of SAE J3271 is to
support charging of any large
battery vehicle/vessel/craft that
" rolls, flies, or floats. " The J3271
TIR document is expect to be
released in 2022-Q3, with
revisions to follow as prototype
couplers and charging systems
are put into the field. This will
help to refine and validate
assumptions in the work-inprogress
document.
If you would like to know more
about this document, or if you
are interested in learning more
about the work of the Megawatt
Charging System Task Force,
contact SAE International's
Dante Rahdar, Ground Vehicle
Committee Manager, at Dante.
Rahdar@SAE.org. n
July 2022
29
REMA
SAE Update - July 2022

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