Automotive Engineering - June 2023 - 26

HYDROGEN STORAGE
A traditional cylindrical hydrogen tank
arrangement for medium-duty commercial vehicles.
Cylindrical tanks no longer are the only solution for storing high-pressure
hydrogen gas. The future is looking decidedly square - and better for vehicle
range and packaging. Experts from Forvia explain.
by Lindsay Brooke
U
ntil recently, there was only one practical solution for storing
gaseous hydrogen for onboard vehicle use: the cylindrical
storage tank. Spiral-wound, carbon fiber cylinders
are the proven form factor for reliable containment of
350-bar (5000-psi) and more commonly, 700-bar (10,000-psi) hydrogen
used in the latest fuel-cell electric and hydrogen-fueled ICengine
vehicles. Faurecia and Symbio, the hydrogen-technologies
joint-venture with partner Michelin, are in the process of changing
the cylindrical-tank paradigm with a new approach that looks
downright...square.
" This hydrogen storage system is our modular, conformable, 700bar
tank, " Rob Steele, product line manager at Faurecia, part of the
Forvia group, told SAE Media while viewing a concept 'skateboard'
chassis at the 2023 Innovation Day at the company's suburban
Detroit tech center. At first glance, the display chassis appeared to
be a pack of battery modules. Then the concept struck.
This was an advanced hydrogen fuel-cell vehicle platform, but not
one with the typical line of pressure cylinders aligned horizontally and
set longitudinally within perimeter frame rails. Instead, rows of 700-bar,
nearly square rectangular fuel tanks were carried in a structural grid.
" Our focus is to reduce overall architecture complexity, from the
26 June 2023
OEMs' perspective, by offering the same packagingfootprint
for hydrogen-fueled and battery-electric
platforms, " explained Tarek Abdel-Baset, Forvia's hydrogen
storage systems chief engineer, zero emissions.
He said the concept is designed with a modular
internal structure that is adaptable according to the
vehicle architecture.
" Whatever your skateboard concept is, and every
OEM's is different, we're able to swap out your battery
pack and put our hydrogen storage system in -
or give you both, " Abdel-Baset noted. The solution
aims to attract vehicle makers and end users seeking
to optimize a single chassis architecture for both BEV
and H2FC propulsion systems and their fueling/
charging infrastructures.
The ubiquitous global Class 3 through 6 commercial
vehicles come to mind in this strategy. Some fleet customers
might need hydrogen's rapid refueling advantage
for a portion of their vehicles' duty cycles. Others
may prefer battery power for a different set of use
cases. Growing interest in hydrogen for both fuel-cell
AUTOMOTIVE ENGINEERING
FAURECIA

Automotive Engineering - June 2023

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