Truck & Off-Highway Engineering - October 2021 - 33

CLOCKWISE FROM TOP: PACCAR; QNOVO; MTU
Q&A
The Peterbilt Model
579EV (left) provides a
range up to 150 miles
and recharge time of 3-4
hours with a DC fastcharger;
the Kenworth
T680 fuel-cell truck
(right) offers a 350-mile
range with a 15-minute
refill time.
An e-fuel's climate neutrality is determined by the energy source.
Qnovo's intelligent battery management software that
implements " adaptive charging " algorithms and predictive tools
to improve battery health is an example of how current charging
and cycle-life constraints might be overcome, said Stephenson.
don't care. If you're driving your
truck in, swapping out your $12,000
or $20,000 battery pack for one
whose lineage you're not familiar
with, you may find the next day you
go to drive your truck your range
has been reduced by 30%. So, that
limits it to maybe fleets having their
own [dedicated] swapping systems.
Swapping systems also take a lot
of space. You need robotic systems
to move these battery packs, which
are probably the footprint of a
ping-pong table and a foot thick or
more, in and out of trucks. It turns
out to be a lot of infrastructure, and
there are alternatives like fastcharging
or hydrogen.
We've heard a lot about hydrogen
fuel cells here at COMVEC. What do
TRUCK & OFF-HIGHWAY ENGINEERING
" These interfaces typically
are not designed to be
made and broken once
per day for 5,000 cycles,
so there's a durability risk
[with battery swapping]
that would need to be
overcome. "
you feel are barriers to hydrogen
fuel-cell use in the next decade?
First of all, infrastructure. Distribution
of hydrogen will continue to be an issue.
Storage density of hydrogen on
trucks isn't great. If you look at the
back of that Kenworth/Toyota fuel-cell
truck, to store 60 kg of hydrogen [six
tanks capable of operating at 700 bar],
we have a closet on the back that is 3
or 4 feet deep and the full height of the
tractor. That's not very good energy
density, so that's a concern as well.
And there's relatively high costs
that go into a fuel-cell stack. They
contain precious metals, very expensive
to make, and that will need to
improve probably by an order of
magnitude for them to get competitive
with battery systems.
Ryan Gehm
October 2021 33

Truck & Off-Highway Engineering - October 2021

Table of Contents for the Digital Edition of Truck & Off-Highway Engineering - October 2021

Truck & Off-Highway Engineering - October 2021 - CVR4
Truck & Off-Highway Engineering - October 2021 - CVR1
Truck & Off-Highway Engineering - October 2021 - CVR2
Truck & Off-Highway Engineering - October 2021 - 1
Truck & Off-Highway Engineering - October 2021 - 2
Truck & Off-Highway Engineering - October 2021 - 3
Truck & Off-Highway Engineering - October 2021 - 4
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Truck & Off-Highway Engineering - October 2021 - CVR4
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