Automotive Engineering - September 2022 - 21
COVER STORY
The BEL's drive-in temperature chamber can accommodate large SUVs.
Electrical Multi-Axis Shaker Table (eMAST): With an
array of six actuators each capable of generating 16,000
lb (71,171 N) of force, under the control of an MTS digital
computer, the BEL's eMAST performs extreme vibration
tests to simulate more than 9,000 miles (14,484 km) of
driving in seven days - in varying climate conditions.
The rig can administer acceleration shock up to 16-g to a
2,200-lb. (998-kg) battery-pack payload, in a thermal
range of -40 deg. to 158 deg. F (-40 deg to 70 deg C).
The eMAST closely monitors all cell parameters via the
pack's CAN bus and is capable of rapid load cycles,
charging at 1,000V/900kW at 800A, and discharging at
350A. " The eMAST will influence our future pack structure
design and engineering, " Maluche said.
Thermal shock chamber: This Weiss Technik unit
engineered for extreme durability testing " is vital for
speeding battery development and validation, "
Maluche noted. By running 40 thermal-shock cycles in
just three days, the chamber reduces the typical thermal-shock
testing cycle by 17 days, he said. Capable of
generating temperature deltas from -40 deg to 158
deg. F, it's the best equipment with which to fully simulate
EV battery cell and pack life (including welds,
seals and fasteners) through a Michigan winter, which
VW engineers deem to be the most extreme coldweather
use case. VW is currently sharing this test
chamber with battery partner SKI.
Drive-in temperature chamber: Measuring 20 x 16 x
11.5 ft, this space is more than large enough to accomAUTOMOTIVE
ENGINEERING
The Thermal Shock chamber has
enabled engineers to reduce testing
time by more than two weeks.
modate the largest SUV (Atlas) currently in VW's lineup, or two ID.4s.
This Weiss Technik WW-series chamber was immediately in big demand
for evaluating batteries across the wide spectrum of North
American climatic/stress scenarios, Maluche said. Thermal capabilities
range from -112 deg. to 356 deg. F (-80 deg. to 280 deg. C), with
September 2022 21
FROM TOP: VW; LINDSAY BROOKE
Automotive Engineering - September 2022
Table of Contents for the Digital Edition of Automotive Engineering - September 2022
Automotive Engineering - September 2022 - Intro
Automotive Engineering - September 2022 - Sponsor1
Automotive Engineering - September 2022 - CVRA
Automotive Engineering - September 2022 - CVRB
Automotive Engineering - September 2022 - CVR1
Automotive Engineering - September 2022 - CVR2
Automotive Engineering - September 2022 - 1
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Automotive Engineering - September 2022 - CVR3
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