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Prof. Dr.-Ing. Julia Kowal

Julia Kowal
Lupe [1]

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 [2]

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


CV
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"

 

 

Awards and Scholarships
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

Development of a Matlab/Simulink Model for Monitoring Cell State-Of-Health and State-Of-Charge via Impedance of Lithium-Ion Battery Cells
Citation key batteries8020008
Author Kim, Jonghyeon and Kowal, Julia
Year 2022
ISSN 2313-0105
DOI 10.3390/batteries8020008
Journal Batteries
Volume 8
Number 2
Abstract Lithium-ion battery cells not only show different behaviors depending on degradation and charging states, but also overcharge and overdischarge of cells shorten battery life and cause safety problems, thus studies aiming to provide an accurate state of a cell are required. Measurements of battery cell impedance are used for cell SoH and SoC estimation techniques, but it generally takes a long time for a cell in each state to be prepared and cell voltage response is measured when charging and discharging under each condition. This study introduces an electrical equivalent circuit model of lithium-ion cells developed in the MATLAB/Simulink environment. Cell SoC, SoH, temperature, and C-rate are considered for more accurate cell impedance prediction, and the simulation results are verified with the measurement results. The developed model is suitable for use in cell SoC and SoH monitoring studies by successfully outputting cell impedance through real-time prediction of cell voltage during discharge.
Link to publication [3] Download Bibtex entry [4]

Address

Technische Universität Berlin
Electrical Energy Storage Technology
Institute of Energy and Automation Technology
Faculty IV
sec. EMH 2
Einsteinufer 11
D-10587 Berlin

Contact

Sec. EMH2
Room EMH 162
+49 (0)30 314-21633
+49 (0)30 314-21133
e-mail query [6]
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