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Prof. Dr.-Ing. Julia Kowal
- Julia Kowal
- © privat
Room: EMH 163
Address:
Einsteinufer 11
Sec. EMH 2
10587 Berlin
Phone: +49 (0)30 314-25394
Fax: +49 (0)30 314-21133
E-mail: Julia.Kowal@tu-berlin.de
Consultation hours: On Mondays 9 - 10 h and on appointment. In summer semester 2022 (25.4.-18.7.), the consultation hour will be from 10-11 h.
In most weeks, I am in the office on mondays, so a personal meeting is possible again. To be sure, please ask before you come. Alternatively, you can phone me or we can arrange a Zoom meeting.
Vita
| since 03/2014 | Chair of Electrical Energy Storage Technology at the TU Berlin |
|---|---|
| 01/10 - 02/14 | Senior engineer at the department of Electrochemical Energy Conversion and Storage Systems, ISEA, RWTH Aachen |
| 2010 | PhD at RWTH Aachen, Topic: "Spatially-resolved impedance of nonlinear inhomogeneous devices - using the example of the lead-acid battery" |
| 04/06-05/06 | Visiting researcher at the company Exide in Azuqueca de Hénares, Spain |
| 10/05-12/05 | Visiting Researcher at the research centre RISØ in Roskilde, Denmark |
| 11/04-12/09 | Research assistant at the department of Electrochemical Energy Storage Conversion and Systems at the Institute For Power Electronics and Electrical Drives (ISEA), RWTH Aachen |
| 10/99-11/04 | Studies of electrical engineering at RWTH Aachen Diploma thesis: "Investigation of the thermal behaviour of electrochemical energy storage systems in vehicle on-board power supplies" |
| 2006 | Herbert-Kind-Price of ETG in the VDE |
|---|---|
| 2006 | Brigitte-Berkenhoff-Price for the best graduate in the field of electrical engineering at RWTH Aachen |
| 2002 | Aachen's VDE price |
| 2001-2004 | Sponsorship through the Prof. Dr. Koepchen Merit Foundation (RWE) |
Publications
| Citation key | batteries7040076 |
|---|---|
| Author | Kim, Jonghyeon and Kowal, Julia |
| Year | 2021 |
| ISSN | 2313-0105 |
| DOI | 10.3390/batteries7040076 |
| Journal | Batteries |
| Volume | 7 |
| Number | 4 |
| Abstract | In this paper, a method for monitoring SoC of a lithium-ion battery cell through continuous impedance measurement during cell operation is introduced. A multi-sine signal is applied to the cell operating current, and the cell SoH and SoC can be simultaneously monitored via impedance at each frequency. Unlike existing studies in which cell impedance measurement is performed ex situ through EIS equipment, cell state estimation is performed in situ. The measured impedance takes into account cell temperature and cell SoH, enabling accurate SoC estimation. The measurement system configured for the experiment and considerations for the selection of measurement parameters are described, and the accuracy of cell SoC estimation is presented. |