The search result changed since you submitted your search request. Documents might be displayed in a different sort order.
  • search hit 91 of 269
Back to Result List

State-of-charge monitoring and battery diagnosis of different lithium ion chemistries using impedance spectroscopy

  • For lithium iron phosphate batteries (LFP) in aerospace applications, impedance spectroscopy is applicable in the flat region of the voltage-charge curve. The frequency-dependent pseudocapacitance at 0.15 Hz is presented as useful state-of-charge (SOC) and state-of-health (SOH) indicator. For the same battery type, the prediction error of pseudocapacitance is better than 1% for a quadratic calibration curve, and less than 36% for a linear model. An approximately linear correlation between pseudocapacitance and Ah battery capacity is observed as long as overcharge and deep discharge are avoided. We verify the impedance method in comparison to the classical constant-current discharge measurements. In the case of five examined lithium-ion chemistries, the linear trend of impedance and SOC is lost if the slope of the discharge voltage curve versus SOC changes. With nickel manganese cobalt (NMC), high impedance modulus correlates with high SOC above 70%.

Export metadata

Additional Services

Share in Twitter Search Google Scholar Statistics
Metadaten
Author:Peter KurzweilORCiD, Wolfgang Scheuerpflug
DOI:https://doi.org/10.3390/batteries7010017
Parent Title (English):Batteries
Document Type:Article
Language:English
Year of first Publication:2021
Release Date:2022/01/17
Tag:aging; battery life testing; capacitance; impedance spectroscopy; lithium-ion battery; pseudocharge; state-of-charge determination; state-of-health
Volume:7
Issue:1
Pagenumber:16
Institutes:Fakultät Elektro- und Informationstechnik
Begutachtungsstatus:peer-reviewed
OpenAccess Publikationsweg:Gold Open Access- Erstveröffentlichung in einem/als Open-Access-Medium
research focus:Energie und Mobilität
Licence (German):Creative Commons - CC BY - Namensnennung 4.0 International