| Zugriffsnummer | 35567 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Analysis of lithium-ion battery models based on electrochemical impedance spectroscopy |
| Autor(in); Institution |
Westerhoff, Uwe; TU Braunschweig, Institute of High Voltage Technology and Electrical Power Systems (elenia), Braunschweig, GERMANY
Kurbach, Kerstin; TU Braunschweig, Institute of High Voltage Technology and Electrical Power Systems (elenia), Braunschweig, GERMANY
Lienesch, Frank; 3.5, Explosionsschutz in der Energietechnik, PTB-Braunschweig
Kurrat, Michael; TU Braunschweig, Institute of High Voltage Technology and Electrical Power Systems (elenia), Braunschweig, GERMANY
|
| Quelle/Jahr | Energy Technology: 4 (2016), 12, 1620 - 1630 |
| ISSN | 2194-4288 (PRINT) ; 2194-4296 (ONLINE) |
| DOI | |
| Verlag | Weinheim: Wiley-VCH |
| Freie Schlagworte | Li-Ion Battery ; electrochemical impedance spectroscopy ; energy storage ; equivalent circuits ; lithium-in batteries ; modeling |
| Zusammenfassung | This work is an overview of various equivalent circuits (EC) with various degrees of detail. The EC are evaluated in terms of model accuracy and parameterization time. For this purpose impedance spectra were measured at different states of charge, temperature and state of health with the electrochemical impedance spectroscopy Then the parameters of the equivalent circuits were extracted with the method least squares and the Levenberg- Marquardt algorithm. Following is a comparison of the simulated to the measured impedance spectrum, for equivalent circuits with RC-and RCPE-elements. The evaluation was made both with the Nyquist and Bode plot, with consideration of process frequencies. With the determination of the global optimum of the EC parameters, equivalent circuit will be assigned to possible applications. Simple equivalent circuit diagrams with a series resistor an a maximum of two RC elements are ideal for simulations with lower dynamics, since they require a low parameterization time and have a sufficient accuracy. Equivalent circuits with up to five RC elements or even a CPE element are due to the possibility of simulating highly dynamic processes by derivation of small and large time constants. With RCPE elements the impedance spectrum can best be modeled why this should be used for diagnostic purposes. With a detailed status diagnosis at rest state of the cell can be determined the remaining useful life by a more detailed consideration of the physical properties. |
