Reference : UMR7274-FRALAP-003
Workplace : NANCY
Date of publication : Monday, May 2, 2022
Scientific Responsible name : François Lapicque
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 1 October 2022
Proportion of work : Full time
Remuneration : 2 135,00 € gross monthly
Description of the thesis topic
The PhD project will be carried out in a scientific environment coupling electrochemical processes with electrical engineering and technology for the parallel realization of the "dimensioning" and "experimentation" aspects of the thesis project. Based on work carried out at low power, a prototype 20 kW hybrid source will be produced and tested.
1- Sizing of the hybrid source
Different types of batteries will be tested, according to the characteristic of the equilibrium voltage with the state of charge and the power offered according to the technology of the electrodes, in order to retain the most suitable one.
The characterization of Li-ion batteries will be supported by modeling based on models previously developed by one of the supervisors (S. Raël): these models are electrochemical or based on equivalent circuits. Different techniques mastered by the group will be used and the interpretation of these data will provide the values of the physicochemical parameters in the models.
The operation of a direct hybrid cell-battery source in driving cycles will be simulated using the previously established battery models. This step will make it possible to determine the characteristics of the hybrid source such as its performance or its flexibility in transporting a fictitious vehicle.
2- Experimental approach
First with a single battery cell, the hybrid sources defined above will be evaluated on the standard power profiles, then by introducing slopes. The comparison of model experience and predictions will allow the refinement of certain parameters and the modification of certain model assumptions. Subsequently, the energy management system (EMS) put in another parallel thesis of the University of Lorraine driving will be used in the tests.
A hybrid source will be extrapolated to operate with a 3 kW battery, then tested in the laboratory on different driving profiles, with EMS: the feedback between the two thesis projects will allow the refinement of the model parameters. Finally, with an industrial partner, a 20 kW hybrid source could be installed and tested on a buggy prototype.
The work will mainly be carried out in the ENSIC part of the laboratory, rue Grandville, in the research group Perseval, SysPol team. More precusely, the doctoral student will be supervised by F. Lapicque, S. Raël (Prof. in GREEN-University of Lorraine) et C. Bonnet
Constraints and risks
No particular hazards or constraints
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