SAE Update - July 2024 - 40
STANDARDS &
COMMITTEES
What does SAE J3277 mean for EV battery
pack performance and safety?
By HEMI SAGI, Document Sponsor for SAE
J3277 and SAE J3277-1.
Many questions surround electric
vehicles as they become more
prevalent in the market, but one
looms as the largest and arguably
most important: are they safe?
Vehicles using high-voltage
systems for electrified propulsion
are expected to be introduced to
the market in increasing
quantities, including plug-in and
hybrid electric vehicles. These
vehicles include rechargeable
energy storage systems (RESS,
aka battery packs) that might be
mounted in locations that are
exposed to water, either through
rain and snow weather conditions
or relatively low levels of standing
water. Users of these vehicles are
anticipated to have some amount
of assurance that such water
exposure will be unlikely to result
in harmful water leakage into a
battery pack.
Recent events such as
Hurricane Ian in 2022 and
Hurricane Idalia in 2023
demonstrated that, currently,
electric vehicles aren't wellprotected
against water ingress
into the battery pack. Water
40 July 2024
A Tesla Model S that experienced thermal run-down after Hurricane Ian
flooded parts of Florida in 2022.
ingress into the battery pack during Hurricane Ian
impacted an estimated 3000 to 5000 electric vehicles
at various levels. Approximately 600 electric vehicles
were totally lost and, of those, approximately 36
battery packs experienced thermal run-down (fire),
which is challenging to distinguish. These vehicles
included multiple models from several OEMs.
Currently, the common regulatory requirement,
particularly in China and South Korea, is to comply
with the ingress protection (IP) standard IEC 60529,
typically at the IPX7 level. However, the traditional
method of testing for compliance to this standard,
which involves immersion in water for 30 minutes, is
not practical for in-line quality assurance tests during
production. Conversion of this type of functional
requirement (as IPX7) into a production leak tightness
specification has been a challenge.
SAE J3277 introduces the equivalent channel (EC)
method, leveraging a concept widely used in the
automotive industry since the early 2000s. This
method offers a more practical approach to convert
UPDATE
North Collier Fire Control & Rescue District
https://www.nhtsa.gov/sites/nhtsa.gov/files/2024-02/16180-NSR-231214-003_SAE_Teardown%20Analysis%20of%20Flood-damaged%20Evs-tag.pdf
https://www.sae.org/standards/content/j3277_202404/
SAE Update - July 2024
Table of Contents for the Digital Edition of SAE Update - July 2024
SAE Update - July 2024 - INTRO1
SAE Update - July 2024 - SPNSR1
SAE Update - July 2024 - COV1
SAE Update - July 2024 - COV2
SAE Update - July 2024 - 1
SAE Update - July 2024 - 2
SAE Update - July 2024 - 3
SAE Update - July 2024 - 4
SAE Update - July 2024 - 5
SAE Update - July 2024 - 6
SAE Update - July 2024 - 7
SAE Update - July 2024 - 8
SAE Update - July 2024 - 9
SAE Update - July 2024 - 10
SAE Update - July 2024 - 11
SAE Update - July 2024 - 12
SAE Update - July 2024 - 13
SAE Update - July 2024 - 14
SAE Update - July 2024 - 15
SAE Update - July 2024 - 16
SAE Update - July 2024 - 17
SAE Update - July 2024 - 18
SAE Update - July 2024 - 19
SAE Update - July 2024 - 20
SAE Update - July 2024 - 21
SAE Update - July 2024 - 22
SAE Update - July 2024 - 23
SAE Update - July 2024 - 24
SAE Update - July 2024 - 25
SAE Update - July 2024 - 26
SAE Update - July 2024 - 27
SAE Update - July 2024 - 28
SAE Update - July 2024 - 29
SAE Update - July 2024 - 30
SAE Update - July 2024 - 31
SAE Update - July 2024 - 32
SAE Update - July 2024 - 33
SAE Update - July 2024 - 34
SAE Update - July 2024 - 35
SAE Update - July 2024 - 36
SAE Update - July 2024 - 37
SAE Update - July 2024 - 38
SAE Update - July 2024 - 39
SAE Update - July 2024 - 40
SAE Update - July 2024 - 41
SAE Update - July 2024 - 42
SAE Update - July 2024 - 43
SAE Update - July 2024 - 44
SAE Update - July 2024 - 45
SAE Update - July 2024 - 46
SAE Update - July 2024 - 47
SAE Update - July 2024 - 48
SAE Update - July 2024 - 49
SAE Update - July 2024 - 50
SAE Update - July 2024 - 51
SAE Update - July 2024 - 52
SAE Update - July 2024 - 53
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