EV Battery Innovation Special Report - November 2023 - 4

EV Batteries
and chemistries faster and with less risk.
For example, testing battery cells using
emulations of real-world conditions will
ensure the performance of cells in their
intended use cases. Test systems must
handle hundreds of cell specimens of
different form factors simultaneously,
with individual channel control for
greater flexibility. Testing should also
be customizable to characterize cell
performance under different orientations,
climates, and drive profiles derived from
standards or field measurements.
Figure 2: Each stage of the development cycle needs test environments that can support the
required voltage.
These changes impact the way
these cells need to be connected
to the test equipment. Therefore,
flexible fixturing is crucial to ensure
adaptability even as cell designs
change from model to model.
* New cell chemistries: There is intensive
research to develop new cell chemistries
with greater energy density, sustainable
production, or application-specific
advantages. However, to produce
cells using these new electrochemical
combinations, different voltage
boundaries and charge-discharge
rates must be characterized before
selecting the optimal electrochemical
composition to meet various
performance and cost parameters.
* Faster charging: Faster charging
leads to higher current demands
and faster transients on the
cell level. Test equipment must
therefore keep up with higher
constant currents and pulses.
* Testing longer-lasting batteries:
Testing longer-lasting batteries
requires longer test cycles to verify
the maximum cycle count and
channel occupation. This requires
numerous rounds of charge and
discharge. Cell cycling equipment
with regenerative power will help
reduce operating electricity costs.
New approaches to battery
development can help companies
research and deploy new form factors
Meeting high-power battery
pack testing requirements
As individual batteries are assembled
into modules and packs, testing shifts
from characterizing internal cell dynamics
to analyzing pack interconnections
between modules and other vehicle
electronics. Other measurements include
determining the pack's durability,
performance under different conditions,
peak power, and failure risks.
At the pack level, faster charging
necessitates test systems that
can support higher voltages to
increase power without significantly
increasing current. An example of
that is the shift from 400 V systems
to 800 V systems, and the potential
emergence of 1,000 V systems.
The introduction of new cell
chemistries also creates different
voltage and current ranges at the pack
level. With new ways of utilizing packs
in cars, multi-channel systems, and
varying power demands are emerging.
Packs with built-in relay contacts
and charging ports are becoming
more common. This requires the
implementation of multi-channel pack
test systems and parallel operations.
It is also interesting to note that
the trend of integrating cells into
packs is gaining popularity. Tests
that were traditionally performed
at the module level are now carried
out on packs, and individual cell
measurements are becoming more
important in this application model.
Facilitating these advancements in EV
The ability to charge EVs at a very fast rate is the key to electrifying mobility across the U.S.
4 NOVEMBER 2023
battery development requires a strategic
technology roadmap that can support
EV BATTERY INNOVATION SPECIAL REPORT

EV Battery Innovation Special Report - November 2023

Table of Contents for the Digital Edition of EV Battery Innovation Special Report - November 2023

EV Battery Innovation Special Report - November 2023 - Cov1
EV Battery Innovation Special Report - November 2023 - Cov2
EV Battery Innovation Special Report - November 2023 - 1
EV Battery Innovation Special Report - November 2023 - 2
EV Battery Innovation Special Report - November 2023 - 3
EV Battery Innovation Special Report - November 2023 - 4
EV Battery Innovation Special Report - November 2023 - 5
EV Battery Innovation Special Report - November 2023 - 6
EV Battery Innovation Special Report - November 2023 - 7
EV Battery Innovation Special Report - November 2023 - 8
EV Battery Innovation Special Report - November 2023 - 9
EV Battery Innovation Special Report - November 2023 - 10
EV Battery Innovation Special Report - November 2023 - 11
EV Battery Innovation Special Report - November 2023 - 12
EV Battery Innovation Special Report - November 2023 - 13
EV Battery Innovation Special Report - November 2023 - 14
EV Battery Innovation Special Report - November 2023 - 15
EV Battery Innovation Special Report - November 2023 - 16
EV Battery Innovation Special Report - November 2023 - 17
EV Battery Innovation Special Report - November 2023 - 18
EV Battery Innovation Special Report - November 2023 - 19
EV Battery Innovation Special Report - November 2023 - 20
EV Battery Innovation Special Report - November 2023 - 21
EV Battery Innovation Special Report - November 2023 - 22
EV Battery Innovation Special Report - November 2023 - 23
EV Battery Innovation Special Report - November 2023 - 24
EV Battery Innovation Special Report - November 2023 - 25
EV Battery Innovation Special Report - November 2023 - 26
EV Battery Innovation Special Report - November 2023 - 27
EV Battery Innovation Special Report - November 2023 - 28
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