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Дисертації з теми "Batteries lithium-ion – Détérioration – Modèles mathématiques":
Mohajer, Sara. "Stratégies de charge rapide de batteries lithium-ion prenant en compte un modèle de vieillissement." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0027.
A physics-based battery model is developed for an accurate state-detection of batteries in the automotive industry. In order to use the model for the purpose of fast charging control an aging observer is designed and integrated to the battery model. In a subsequent step a robust fast charging control is introduced to design a controller able to deal with large parametric uncertainties of the battery model while achieving the fast charging target. Finally some simplifications in the battery model structure, in the optimization technique and in the definition of fast charging profiles are proposed and evaluated to make the whole model applicable for an onboard battery management system
Larvaron, Benjamin. "Modeling battery health degradation with uncertainty quantification." Electronic Thesis or Diss., Université de Lorraine, 2024. http://www.theses.fr/2024LORR0028.
With the acceleration of climate change, significant measures must be taken to decarbonize the economy. This includes a transformation of the transportation and energy production sectors. These changes increase the use of electrical energy and raise the need for storage, particularly through Lithium-ion batteries.In this thesis, we focus on modeling battery health degradation. To quantify the risks associated with performance guarantees, uncertainties must be taken into account. Degradation is a complex phenomenon involving various interacting physical mechanisms. It varies depending on the battery type and usage conditions. We first addressed the issue of the temporal degradation under a reference experimental condition using a data-driven approach based on Gaussian processes. This approach allows for learning complex models while incorporating uncertainty quantification. Building upon the state-of-the art, we proposed an adaptation of Gaussian process regression. By designing appropriate kernels, the model explicitly considers performance variability among batteries. However, Gaussian process regression generally relies on a stationarity assumption, which is too restrictive to account for uncertainty evolution over time. Therefore, we have leveraged the broader framework of chained Gaussian process regression, based on variational inference. With a suitable choice of likelihood function, this framework allows for adjusting a non-parametric model of the evolution of the variability among batteries, significantly improving uncertainty quantification. While this approach yields a model that fits observed cycles well, it does not generalize effectively to predict future degradation with consistent physical behaviors. Specifically, monotonicity and concavity of degradation curves are not always preserved. To address this, we proposed an approach to incorporate these constraints into chained Gaussian process regression. As a result, we have enhanced predictions over several hundred cycles, potentially reducing the necessary battery testing time—a significant cost for manufacturers. We then expanded the problem to account for the effect of experimental conditions on battery degradation. Initially, we attempted to adapt Gaussian process-based methods by including experimental factors as additional explanatory variables. This approach yielded interesting results in cases with similar degradation conditions. However, for more complex settings, the results became inconsistent with physical knowledge and were no longer usable. As a result, we proposed an alternative two-step approach, separating the temporal evolution from the effect of factors. In the first step, temporal evolution was modeled using the previously mentioned Gaussian process methods. The second, more complex step utilized the results from the previous stage—Gaussian distributions—to learn a model of experimental conditions. This required a regression approach for complex data. We suggest using Wasserstein conditional barycenters, which are well-suited for distribution cases. Two models were introduced. The first model, within the structured regression framework, incorporates a physical degradation model. The second model, using Fréchet regression, improves results by interpolating experimental conditions and accounting for multiple experimental factors
Juston, Maxime. "Suivi du vieillissement des batteries lithium embarquées, en usage ferroviaire." Thesis, Compiègne, 2021. http://www.theses.fr/2021COMP2596.
The classical electrical model of a cell considers it as a homogeneous whole With unique characteristics (resistance, capacitance). On the contrary, we consider that a cell can be subdivided into a certain number of volumes which are considered as homogeneous from the point of view of electrical properties. The modelling of a cell is then carried out by a set of electrical circuits, one per volume. Once this construction is completed, we seek to characterise each of the parameters of the electrical circuits by means of experimental measurements. A new method of determining the parameters for cells with a non-linear open circuit voltage is proposed, which makes possible to solve many of the difficulties encountered in our work and in previous ones. The variations of the parameters with temperature and current are also determined. A second determination, this time by optimization, allows to introduce a difference of the parameters values in order to model the heterogeneity. Experimental comparisons allow to validate the relevance of the heterogeneous model and its performances. The parameters modelling the heterogeneity are representative of the cell internals and the monitoring of these parameters during the life of the cell, and therefore its ageing, allows a diagnosis of the latter to be made. An application on a pack of two cells, one new and one artificially aged, allows a qualitative discrimination of the cells. This validates the potential of this representation as a diagnostic tool
Eddahech, Akram. "Modélisation du vieillissement et détermination de l’état de santé de batteries lithium-ion pour application véhicule électrique et hybride." Thesis, Bordeaux 1, 2013. http://www.theses.fr/2013BOR14992/document.
In this thesis, we focus on the reliability of lithium batteries used for automotive applications. For this purpose, electric and thermal characterization methodologies as well as aging tests under several modes (calendar, power cycling, calendar/power cycling) are carried out.In a first part of the work, battery modeling and battery state estimation (state-of-charge and state-of-health) are considered.Then, based on periodic characterization from electrochemical impedance spectroscopy, calendar aging is investigated. Next, we proposed an original process for precise battery state-of-health determination that exploits a full recharge and mainly constant-voltage charge step which allows easily its integration within a battery management system. Our experimental results, up to two years real-life data, confirm effectiveness of our technique.Finally, we study the capacity recovery phenomenon occurring due to combined battery aging (calendar/power cycling). This final part is almost dedicated to introduce strategies for battery use presenting at the same time a thermal behavior study
Mesbahi, Tedjani. "Influence des stratégies de gestion d’une source hybride de véhicule électrique sur son dimensionnement et sa durée de vie par intégration d’un modèle multi-physique." Thesis, Ecole centrale de Lille, 2016. http://www.theses.fr/2016ECLI0004/document.
This thesis contributes to the improvement of hybrid embedded source performances supplies an electric vehicle. The studied solution is composed of Li-ion batteries and supercapacitors hybridization, with an aim to achieve improved performances in terms of weight and lifetime over traditional solutions. Our main goal is to take the best advantage of new energy management strategies of the hybrid embedded source and quantify obtained improvements. A multi-physic model including electric, thermal and aging behaviors is developed and integrated into the algorithm of energy management in order to evaluate the gradual degradation of storage components performances during driving cycles and implemented control strategy. New energy management strategies intended to act on the lifetime of hybrid embedded source have been evaluated. Their impact on the performances of the source in terms of weight, cost and lifetime has been quantified and clearly shows that it is possible to make better use of hybrid embedded source thanks to a good power sharing, thus opening the way to new approaches of energy management for these systems
Mergo, Mbeya Karrick. "Contribution à la modélisation de batteries lithium ion : optimisation des charges rapides par rapport à la réaction de dépôt de lithium métal." Thesis, Compiègne, 2021. http://www.theses.fr/2021COMP2595.
Lithium deposition reaction is a local and undesirable phenomenon within Li-ion batteries. It is widely describe in the literature as one of the major limiting phenomena of rapid Li-ion cell loading. The control ofthis reactio in real time therefore seems to be a key factor for an optmal fast charging. This is classically studied by ve complex physical models and using experimental techniques requiring invasive tests on battery. As part of th study ofthis thesis, a methodology has been established, including a simplified modelling as well as non-invasiv experimental characterizations of Li-ion, to estimate all charging currents close to the limit of the lithiu deposition reaction. Experimental studies have been conducted on a graphite/LFP cell to validate these current and this resulted in a charging protocol where the current evolves With the load state and temperature of the cel It has been observed that these currents allow the cell to be charged ultra quickly without triggering the lithiu metal deposition reaction. For a charge at 0°, the cell has been recharged in 11 minutes between 10% and 87% of the state of charge. It has been validated that the estimated currents are close to, less than 10%, the « real » lim for triggering the lithium deposition reaction. Finally, by comparing cycling With these estimated limit curren and the charge at IC, no additional aging has been observed after more than 100 cycles at 0°
Edouard, Clément. "Vieillissement des batteries Li-ion de traction : des mécanismes vers le vieillissement accéléré." Thesis, Compiègne, 2015. http://www.theses.fr/2015COMP2221/document.
Due to their high power and energy densities, Li-ion batteries are the leading systems for the new generations of electric vehicles, for which an optimum cell design, management and configuration is essential. Modeling provides tools to perform complex analysis of the performance of Li-ion batteries and reduces the amount of time spent on experimental testing. The aim of our research is to propose a physics-based model that can predict battery behavior and aging under various conditions during the entire lifespan. A simplified electrochemical and thermal model that can predict both physicochemical and aging behaviors of Li-ion batteries has been studied. A sensitivity analysis of all its physical parameters has been performed in order to find out their influence on the model outputs based on simulations under various conditions. The results gave hints on whether a parameter needs particular attention when measured or identified and on the conditions under which it is the most sensitive. A specific simulation profile has been designed for parameters involved in aging equations in order to determine their sensitivity. Finally, a step-wise method has been followed to limit the influence of parameter values when identifying sorne of them. This sensitivity analysis and the subsequent step-wise identification method show very good results, such as a better fitting of the experimental data with simulated cell voltage. Beyond advanced comprehension and prediction, this physical model opens new possibilities to define accelerated aging tests
Quelin, Aurélien. "Microstockage électrique pour microrobotique à énergie embarquée." Electronic Thesis or Diss., Compiègne, 2022. http://www.theses.fr/2022COMP2705.
An analysis of the design methods of energy autonomous microrobots carried out during this thesis highlights the fact that these methods may not be optimal, and that the performance of these microrobots could be improved through a co-design of their energy source and their motion system. This thesis work therefore addressed the following question : « Is there an advantage to using fine models for the design of a microrobot, and in particular for co-design of its battery and its displacement system? ». To answer this question, we have studied an on-board power supplied microrobot for which it is possible to size the battery, of lithium-ion chemistry and coin cell format, and the displacement system, based on the impact-drive inertial principle implemented around an electromagnetic actuator. The study of the co-design of these two components has been carried out using their coupled fine models, which have been validated experimentally during the thesis. We have shown, using these coupled models, that the optimal sizing of the whole system does not correspond to the sum of the optimal sizings of the individual components, but to a compromise difficult or impossible to determine without these coupled models, because of the cross-interactions of the effects of the design parameters. The microrobot studied during thisthesis has thus demonstrated the interest of the method used, which could be used on other microsystems, depending on their characteristics