Student for thesis: Parameterization of an aging model for lithium-ion battery cells

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Number: MER0003OAV The “System Development HV Batteries” division of “Mercedes-Benz AG” deals with the evaluation of current and future high-voltage battery concepts for battery-electric and plug-in hybrid vehicles. For this purpose, simulation models are used in early development phases in order to optimally design and coordinate vehicle and components. Physically based aging models for the dominant aging effects are developed for the correct life prediction of lithium ion cells. The aging and drying of the electrolyte was identified as a decisive mechanism behind the sudden strong loss of capacity (Sudden-Death). In order to parameterize this model cost-effectively, measurements are used using experimental cells. These challenges come to you: At the experimental cell level, an aging model is to be parameterized using impedance measurements. In addition, the influence of the measurement setup on the measurement results is considered more precisely. The following steps are planned: literature research on battery cell aging, impedance measurements and their interpretation Measurement of different Li-ion experimental cells with varying measurement setup and cell parameters impedance measurements in the frequency and time range with varying cell structures Analysis of the performance of the Li-ion cell with Matlab Evaluation of data and drawing conclusions on aging effects, as well as evaluation of measurement methods

The final topics will be discussed with the university, you and us. The final work can start from September 2025.

Degree course (Master) in the field of chemistry, physics, energy technology, process engineering or a comparable degree course Good knowledge of lithium-ion technology Good knowledge of measurement methods (EIS, GITT, capacity determination) Experience with laboratory work Knowledge of Matlab/Simulink Safe handling of MS Office Commitment and team skills Analytical thinking and strategic working Additional information: Of course, without formalities, we are not. Please apply exclusively online and add a CV to the application, current enrollment certificate, current grade, relevant certificates (maximum size of the appendix 5 MB) and in the online form mark your application documents as 'relevant for this application'. Further information on the setting criteria can be found here. Members of countries outside the European Economic Area may send their residence/work permit. We are particularly pleased to receive online applications of disabled people and disabled people. If you have any questions, you can also contact the SBV-Untertuerkheim@mercedes-benz.com for the location's heavy-handed representation, which will be happy to assist you in the further application process after your application. Please understand that we no longer accept paper applications and there is no claim to return. Questions about the application process will be answered by HR Services by e-mail to myhrservice@mercedes-benz.com or by phone: 0711/17-99000 (Monday to Friday between 10-12 am and 13-15 pm).

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