Automotive Engineering - June 2023 - 10

TECHNOLOGY
REPORT
BATTERIES
New Chinese EVs feature ASSB tech
SAE INTERNATIONAL
BOARD OF DIRECTORS
Todd Zarfos
President
Carla Bailo
2024 President
Srinivasa (Sri) Srinath, Ph.D
2022 President
Susan Ying, Ph.D
Vice President - Aerospace
Daniel Nicholson
Vice President - Automotive
Audley Brown
Vice President -
Commercial Vehicle
China's top selling
electrified vehicles in
2022 in rank order.
By the end of 2023 there will be 10 Chinese
electric passenger vehicles using advanced
semi-solid-state batteries (ASSB) - an industry-first
application for EVs and a milestone for
vehicle electrification, according to Paul
Haelterman, North American VP at Autodatas,
a vehicle benchmarking and research firm. It's
" a huge step for the industry's production pursuit
of all-solid-state batteries, " Haelterman
told SAE Media ahead of his presentation on
China's EV market at SAE's WCX 2023 conference
in Detroit.
A semi-solid-state battery can be one in
which one electrode does not contain a liquid
electrolyte and the other electrode does. Or it
can be a battery in which the mass or volume
of the solid electrolyte in the monomer accounts
for half of the total mass or volume of
the electrolyte in the monomer. Some battery
experts view semi-solid-state as a compromise
technology, offering a faster route to scale, but
is heavy and requires more volume.
The EV models coming in China will have an
estimated driving range of 1000 km (621 miles)
and a battery recharge time of 10 minutes to
achieve 80% state of charge, Haelterman said.
" These EVs will also have 10x the cycle life of
current lithium-ion batteries, " he added. More
changes will materialize with all-solid-state batteries
as ASSB utilize 25% of the total lithium
used in current EV batteries use and do not
contain cobalt, he added.
10 June 2023
China is the global EV battery technology
leader right now, Haelterman asserted. The
country's battery industry Ied by Contemporary
Amperex Technology Company (CATL), largest
EV battery producer in the world. In 2022,
CATL's Yibin plant in China's southwest Sichuan
Province was certified as the world's first zero
carbon battery factory.
Passenger EV sales are on a major upswing in
China, whose population exceeds 1.4 billion (and
recently lost the most-populus-nation crown to
India). In 2022, China's EV market share tallied
31%, vastly more than the approximately 5.5% in
the U.S. " More EVs were sold in China last year
than the rest of the world combined, " Haelterman
noted. The 6.8 million-plus EVs sold reflected an
astonishing jump of 80% from 2021 to 2022.
With sales of more than 475,000 units in
2022, BYD's Seal sedan was the top seller
among all EVs in China. The car rides on a vehicle
platform the company calls 3.0. The Seal's
lithium-iron-phosphate (LFP) battery system
has a 150-kW capacity, 310 kW torque and 1.63
kW/kg power density, the company claims. It
weighs 114.6 kg (252.6 lb).
A teardown of the Seal sedan by Autodatas,
using digital scanning of components and material
analysis, showed that the integration of
Seal's electric drive system substantially improved
versus the 2.0 electric platform used
by BYD's Han EV sedan. The Han EV reached
the marketplace three years earlier than the
Andrew Jeffers
Treasurer
David L. Schutt, Ph.D
Chief Executive Officer
Gregory L. Bradley, Esq.
Secretary
Judy Curran
Mary Lee Gambone
Michael Weinert
Joan Wills
SAE International Sections
SAE International Sections are local
units comprised of 100 or more SAE
International Members in a defined
technical or geographic area. The purpose
of local Sections is to meet the technical,
developmental, and personal needs of the
SAE Members in a given area. For more
information, please visit sae.org/sections
or contact SAE Member Relations Specialist
Abby Hartman at abby.hartman@sae.org.
SAE International
Collegiate Chapters
Collegiate Chapters are a way for SAE
International Student Members to get
together on their campus and develop
skills in a student-run and -elected
environment. Student Members are vital
to the continued success and future of
SAE. While your course work teaches
you the engineering knowledge you
need, participation in your SAE Collegiate
Chapter can develop or enhance other
important skills, including leadership,
time management, project management,
communications, organization, planning,
delegation, budgeting, and finance. For
more information, please visit students.
sae.org/chapters/collegiate/ or contact
SAE Member Relations Specialist Abby
Hartman at abby.hartman@sae.org.
AUTOMOTIVE ENGINEERING
AUTODATAS
http://www.sae.org/sections http://www.sae.org/chapters/collegiate/
Automotive Engineering - June 2023

Table of Contents for the Digital Edition of Automotive Engineering - June 2023
