University of Twente Student Theses
Modeling battery cells with different chemistries based on EIS measurements
Marót, Benedek (2024) Modeling battery cells with different chemistries based on EIS measurements.
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| Abstract: | In the rapidly growing need for clean and green energy, the market for batteries is growing fast. The research for better performance, longer lifetime and higher storage capacity is one of the most important topics in the battery sector. To further improve battery technologies, modelling and simulation are indispensable. To successfully simulate and model batteries, equivalent circuit models (ECM) need to be developed. In this report, three different Lithium-ion battery chemistries are investigated and their potential ECM is discussed. With the help of EIS measurements, impedance plots can be obtained for each battery type, from these plots different conclusions are drawn regarding the relationship between impedance and state of charge (SoC) and between impedance and charging direction. After these, the potential ECMs were simulated and compared to the measurement data. It turned out that for two of the three chemistries, the same ECM is a suitable choice. This ECM included two CPEs, resistors and a Warburg element. |
| Item Type: | Essay (Bachelor) |
| Faculty: | EEMCS: Electrical Engineering, Mathematics and Computer Science |
| Subject: | 50 technical science in general |
| Programme: | Electrical Engineering BSc (56953) |
| Link to this item: | https://purl.utwente.nl/essays/102234 |
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