Assessment of the State of Health of Second-Life Lithium-Ion Batteries Using Quantitative Ultrasound Spectroscopy
Affiliation Type:
Other
Keywords:
Quantitative ultrasound spectroscopy (QUS), lithium-ion batteries, second-life batteries, state of health, state of charge, non-destructive evaluation
Abstract:
Li-ion batteries are the most common source of energy in electric mobility and portable devices. To determine the quality of batteries, the efficient estimation of two parameters is crucial: the State of Charge (SOC) determines the charge a battery is holding at a given moment; and the State of Health (SOH), indicates the residual battery capacity compared to the nominal one. Ultrasound seems to be a promising non-destructive approach as several groups have demonstrated that the SOC and SOH have an impact on the time of flight of ultrasonic waves propagating through batteries. In the current work, we explored the use of Quantitative Ultrasound Spectroscopy to estimate the SOC and the SOH in 18650 second-life batteries.
