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  4. Probing lithium-ion batteries' state-of-charge using ultrasonic transmission - concept and laboratory testing
 
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2017
Journal Article
Titel

Probing lithium-ion batteries' state-of-charge using ultrasonic transmission - concept and laboratory testing

Abstract
For electrically powered applications such as consumer electronics and especially for electric vehicles a precise state-of-charge estimation for their lithium-ion batteries is desired to reduce aging, e.g. avoiding detrimental states-of-charge. Today, this estimation is performed by battery management systems that solely rely on charge bookkeeping and cell voltage measurements. In the present work we introduce a new, physical probe for the state-of-charge based on ultrasonic transmission. Within the simple experimental setup raised cosine pulses are applied to lithium-ion battery pouch cells, whose signals are sensitive to changes in porosity of the graphite anode during charging/dis-charging and, therefore, to the state-of-charge. The underlying physical principle can be related to Biot's theory about propagation of waves in fluid saturated porous media and by including scattering by boundary layers inside the cell.
Author(s)
Gold, Lukas
Fraunhofer-Institut für Silicatforschung ISC
Bach, Tobias
Fraunhofer-Institut für Silicatforschung ISC
Virsik, Wolfgang
Fraunhofer-Institut für Silicatforschung ISC
Schmitt, Angelika
Fraunhofer-Institut für Silicatforschung ISC
Müller, Jana
Fraunhofer-Institut für Silicatforschung ISC
Staab, Torsten E.M.
Fraunhofer-Institut für Silicatforschung ISC
Sextl, Gerhard
Fraunhofer-Institut für Silicatforschung ISC
Zeitschrift
Journal of power sources
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DOI
10.1016/j.jpowsour.2017.01.090
Language
English
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Fraunhofer-Institut für Silicatforschung ISC
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  • Batterie

  • Lithium-Ionen-Batteri...

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  • Ultraschall

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