TY  - JOUR
AU  - Wasylowski, David
AU  - Neubauer, Sven
AU  - Faber, Matthias
AU  - Ditler, Heinrich
AU  - Sonnet, Morian
AU  - Blömeke, Alexander
AU  - Dechent, Philipp
AU  - Gitis, Alexander
AU  - Sauer, Dirk Uwe
TI  - In situ tomography of lithium-ion battery cells enabled by scanning acoustic imaging
JO  - Journal of power sources
VL  - 580
SN  - 0378-7753
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2024-02575
SP  - 233295 -
PY  - 2023
N1  - Zudem unterstützt durch BMBF Grants: MADAM4Life (grant number 03XP0327C), NUBase (grant number 03XP0322C)
AB  - Imaging the interior of battery cells provides vital information for battery manufacturing, as well as lifetime and performance prediction. This work demonstrates a scalable and in-situ method to image the structural state of battery cells with layer resolution. Building on our prior publication, we apply ultrasound waves on pouch cells and process the reflected instead of the transmitted wave. This allows us to utilize time-of-flight data to provide depth information for later signal parts. We develop and demonstrate an algorithm that dissects the reflected ultrasound wave and calculates individual reflections from material interfaces within the electrode stack by fitting their estimated envelopes onto the Hilbert transformation of the entire wave. Consecutive individual reflections are used to calculate the reflection coefficient from the material interface, which is then mapped onto a color map. Using this algorithm, we image an aged and pristine pouch cell from the same manufacturing batch. The generated images showed a clear correlation with optical images from a post-mortem analysis. Indications from the ultrasound image were verified as lithium-plating.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001024330300001
DO  - DOI:10.1016/j.jpowsour.2023.233295
UR  - https://juser.fz-juelich.de/record/1024925
ER  -