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https://thedriven.io/2025/08/05/researchers-unveil-method-for-real-time-ev-battery-state-of-health-monitoring/>
"German research organisation Fraunhofer has unveiled an innovative new method
of measuring in real time the state of health of electric vehicle (EV)
batteries, a development that could enable optimised battery management as well
as make them safer and extend their lifespans.
The new method was developed by the Fraunhofer Institute for Manufacturing
Technology and Advanced Materials (IFAM), one of over 70 institutes that make
up the Fraunhofer group, and develops further a technique known as impedance
spectroscopy.
Impedance spectroscopy is the most informative method of measuring a battery’s
capacity and state of charge (SoC) and provides information to determine a
battery’s state of health (SoH) and safety status.
However, impedance spectroscopy has previously been a lengthy process and has
only been possible when the battery is in a resting state, meaning that it can
take up to 20 minutes before the data is ready and available.
Researchers from Fraunhofer IFAM say they have now been able to create what
they call ‘dynamic impedance spectroscopy’ which makes it possible to calculate
measurements regarding a battery’s status during operation while also making
the measurements available in real time.
This method is able to be used on lithium-ion batteries as well as solid-state,
sodium-ion or lithium-sulphur batteries, and possibly even future technologies.
According to Fraunhofer IFAM, the information obtained with dynamic impedance
spectroscopy “encompasses much more than simple data about the charge capacity
or remaining operating time” and is able to provide “a detailed, accurate, and
in-depth picture of what is going on inside the battery” and makes it possible
to “predict the battery cell’s potential lifespan”.
Information available from dynamic impedance spectroscopy easily exceeds
information currently available on battery charge status that is usually
incorporated into an EVs electronics."
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*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://xanadu.com.au/ Chief Scientist, Xanadu
https://glasswings.com.au/ Partner, Glass Wings
https://sericyb.com.au/ Manager, Serious Cybernetics
