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Operando Ultrasonic Monitoring of Lithium-Ion Battery Temperature and Behaviour at Different Cycling Rates and under Drive Cycle Conditions
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- Owen, Rhodri E. (författare)
- UCL, Dept Chem Engn, Electrochem Innovat Lab, London WC1E 7JE, England.;Harwell Sci & Innovat Campus, Faraday Inst, Didcot OX11 0RA, Oxon, England.
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- Robinson, James B. (författare)
- UCL, Dept Chem Engn, Electrochem Innovat Lab, London WC1E 7JE, England.;Harwell Sci & Innovat Campus, Faraday Inst, Didcot OX11 0RA, Oxon, England.
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- Weaving, Julia S. (författare)
- UCL, Dept Chem Engn, Electrochem Innovat Lab, London WC1E 7JE, England.;Harwell Sci & Innovat Campus, Faraday Inst, Didcot OX11 0RA, Oxon, England.
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- UCL, Dept Chem Engn, Electrochem Innovat Lab, London WC1E 7JE, England;Harwell Sci & Innovat Campus, Faraday Inst, Didcot OX11 0RA, Oxon, England. UCL, Dept Chem Engn, Electrochem Innovat Lab, London WC1E 7JE, England. (creator_code:org_t)
- 2022-04-28
- 2022
- Engelska.
- Ingår i: Journal of the Electrochemical Society. - : The Electrochemical Society. - 0013-4651 .- 1945-7111. ; 169:4
- Tidskriftsartikel (refereegranskat)
Abstract
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- Effective diagnostic techniques for Li-ion batteries are vital to ensure that they operate in the required voltage and temperature window to prevent premature degradation and failure. Ultrasonic analysis has been gaining significant attention as a low cost, fast, non-destructive, operando technique for assessing the state-of-charge and state-of-health of Li-ion batteries. Thus far, the majority of studies have focused on a single C-rate at relatively low charge and discharge currents, and as such the relationship between the changing acoustic signal and C-rate is not well understood. In this work, the effect of cell temperature on the acoustic signal is studied and shown to have a strong correlation with the signal's time-of-flight. This correlation allows for the cell temperature to be inferred using ultrasound and to compensate for these effects to accurately predict the state-of-charge regardless of the C-rate at which the cell is being cycled. Ultrasonic state-of-charge monitoring of a cell during a drive cycle illustrates the suitability of this technique to be applied in real-world situations, an important step in the implementation of this technique in battery management systems with the potential to improve pack safety, performance, and efficiency:
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- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Annan kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Other Chemical Engineering (hsv//eng)
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