Clés de progrés technico-économiques des batteries lithium-ion pour la traction automobile

Abstract : Electric and hybrid vehicles are particularly attractive. They offer several advantages, but at a high cost, which explains their current limited success. The purpose of this work is to contribute to the cost reduction of lithium-ion batteries, the main cost factor in electric vehicles. For the evaluation of cost reduction solutions, a clear and detailed comprehension of the structure of the battery cost is required. A complete environment for the cost modelling of cells for lithium ion batteries has also been developed: two cost models and two databases. This environment is made in order to precisely calculate the cost of a battery using the design parameters. Since there are uncertainties surrounding the cost modelling, an innovative method for the assessment of this uncertainty has also been developed. Using the cost model, several ways of improvement for lithium-ion batteries have been detected and quantified. Thus, a way to reduce the cost evaluated in this work is concerned with a design parameter neglected in the literature: the electrode coating thickness. This model has also confirmed a point already suggested on several papers: the preponderance of active materials on overall cost of lithium-ion batteries. To understand the reasons behind this fact, a cost model for active materials has been developed. New ways of cost reduction have been highlighted with this model. Finally, this work proposes for the first time a complete modelling of cells for lithium-ion batteries, detailed up to materials precursors. It also indicates several ways to reduce the cost of these batteries. This work gives to the community a comprehensive view on the cost structure, essential for the optimization of lithium-ion batteries.
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Gaëtan Patry. Clés de progrés technico-économiques des batteries lithium-ion pour la traction automobile. Sciences de l'ingénieur [physics]. Ecole nationale supérieure d'arts et métiers - ENSAM, 2014. Français. ⟨NNT : 2014ENAM0065⟩. ⟨tel-01127569⟩

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