PhD Position – Physics-Based Battery Modelling, Parameterisation and Validation

You will develop, parameterise and validate physics-based battery models, initially focusing on test cells investigated under controlled laboratory conditions. Your work will combine different types of experimental data to establish reliable methods for identifying physically meaningful model parameters and assessment model accuracy under dynamic operating conditions. In a later stage, the developed approaches will be evaluated using operating data from electric vehicles. Your responsibilities include: Further developing physics-based electrochemical battery models for dynamic discharge and discharge applications, including impedance-capable and multi-particle model structures Developing systematic parameterization methods by combining time-domain measurements with frequency-domain data from electrochemical impedance spectroscopy Performing laboratory battery measurements using battery test equipment, including assembling and connecting test cells using the required laboratory tools Applying parameter estimation and optimisation methods, supported by sensitivity and identifiability analyses Parameterising and validating battery models using test-cell measurements and quantifying their accuracy under different operating conditions and dynamic load profiles Processing and analysing experimental and time-series data and investigating the transferability of laboratory-based parameterization methods to available electric-vehicle operating data Documenting and publishing the scientific results and presenting them at project meetings and conferences Collaborating closely with researchers working on battery experiments, battery ageing and model-based charging strategies

A university Master's degree in electrical engineering, mechanical engineering, chemical engineering, electro, physics, applied mathematics, computational engineering or a related discipline Sound knowledge of numerical modelling and physics-based battery modelling Experience in scientific programming and numerical simulation using MATLAB and/or Python, as well as in processing and analysing experimental data Practical experience with laboratory battery test equipment and with assembling and connecting test cells is a must Experience with parameter estimation, mathematical optimisation, sensitivity analysis or identifiability analysis is highly desirable Knowledge of electrochemical impedance spectroscopy and a strong interest in combining physical modelling with experimental measurements are Strong analytical skills and a structured, independent and solution-oriented approach scientific work, together with the ability to work effectively in a collaborative and international project environment Very good command of written and spoken English with extensive vocabulary is required (at least B2 level according to the CEFR), ideally supported by a confirm certificateing the language level. Knowledge of the German language is not mandatory but certainly appreciated

Team & Environment: You will work in a motivated team with an international and interdisciplinary focus – at one of the largest research institutions in Europe Research & Infrastructure: You will have access to excellent scientific and technical facilities for your work Networking & Exchange: You will participate in (international) conferences and project meetings and active build your scientific network Work-life balance: We offer flexible working hours to help you balance your professional and personal life. You therefore have the option of flexible working (in terms of location), which is generally possible after consultation and in line with upcoming tasks and (on-site) appointments Annual Leave: You get 30 days of annual leave Knowledge & Development: Your professional development is important to us – we support you individually and individually e.g., through training and networking opportunities for doctoral candidates (JuDocS) and with continuous, expert guidance from your academic supervisor Health & well-being: Your health is important to us. You can look forward to a comprehensive company health management program with a wide range of options, including a beach volleyball court, running groups, yoga classes and much more. In addition, our company medical service and an experienced social counselling team are available to assist you on site Fair remuneration: Depending on your qualifications and assigned responsibilities, you will be classified according to pay group 13 (75%) of the TVöD-Bund. In addition to the basic salary, there is an additional year-end bonus under the collective pay agreement amounting to 75% of a monthly salary, as well as capital-forming benefits. All information about the TVöD-Bund collective agreement can be found on the BMI website (pay scale table on page 66 ff. of the PDF download) Fixed-term: The position is limited to 3 years Support for international employees: Our International Advisory Service makes it easier for international employees to get started In addition to exciting tasks and a collegial working environment, we offer you much more: https://go.fzj.de/benefits We welcome applications from people with diverse backgrounds, e.g. in terms of age, gender, disability, sexual orientation/ identity, and social, ethnic and religious origin. A diverse and inclusive working environment with equal opportunities in which everyone can realize their potential is important to us. The following links provide further information on diversity and equal opportunities: https://go.fzj.de/equality and on specific support options for women: https://go.fzj.de/womens-job-journey