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Prof. Dr.-Ing. Julia Kowal

Julia Kowal
Lupe

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:

Consultation hours: On Mondays 9 - 10 h and on appointment 

Please note: Until further notice, there is no consultation hour with personal contact. Please phone me or write me an email.

The consultation hours on December 21 and 28 are cancelled.

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

Discharge Rate Capability in Aged Li-Ion Batteries
Citation key Salinas2_2020
Author Felipe Salinas and Julia Kowal
Pages 140519
Year 2020
DOI 10.1149/1945-7111/abc207
Journal Journal of The Electrochemical Society
Volume 167
Number 14
Month oct
Publisher The Electrochemical Society
Abstract A dataset is presented containing the rate capability measured for Lithium-ion cells obtained from old notebook batteries. The experimental results show an intersection of rate capabilities, related to degraded cells that exhibit high reversible capacities compared to the rated value and measured at 0.1C discharge rate, but a fast voltage decay and a constrained discharge capacity measured at 1C. With the aid of an electrochemical model it is shown that this intersection is possible if cells containing a lower concentration of Lithium salt in the electrolyte are compared to others that experienced a higher damage in the electrodes during their first use. This article casts doubts on the validity of a state of health determined from the discharge capacity measured at one rate for the classification of Li-ion batteries for a second life, if applied to datasets containing batteries experiencing diverse degradation paths.
Link to publication Download Bibtex entry

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Auxiliary Functions

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