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Theses

Fast-charging of Lithium-ion batteries with ohmic-drop compensation method

Abstract : The aim of this thesis is to study fast-charging of lithium-ion, battery using the ohmic-drop compensation method. The latter method theoretically will reduce the total charging of the batteries considered. In this thesis, the ODC method was implemented on three different types of 18650 battery cells. These batteries are C/LFP, C/NMC and LTO/LFP. This method show a good result for C/LFP and LTO/LFP batteries with a reduction of total charging time of about 70% in comparison with the classical method. Nevertheless, there are some issues regarding this method; the temperature elevation of the battery is high during fast-charging. Indeed, almost all fast-charging procedure experiences the same problem concerning that matter. Moreover, with ODC fast-charging method, high current rate and high voltage will worsen the situation. These complications of the ODC fast-charging method are key points for both performance and durability of the batteries. Particularly, we have demonstrated that C/LFP battery underwent internal degradation as a mechanical deformation of the active materials and degradation of electrolyte.
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https://tel.archives-ouvertes.fr/tel-01718584
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Submitted on : Tuesday, February 27, 2018 - 3:07:08 PM
Last modification on : Saturday, October 10, 2020 - 3:34:02 AM
Long-term archiving on: : Monday, May 28, 2018 - 1:56:50 PM

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  • HAL Id : tel-01718584, version 1

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Mohd Hilmi Noh. Fast-charging of Lithium-ion batteries with ohmic-drop compensation method. Electric power. Université Grenoble Alpes, 2017. English. ⟨NNT : 2017GREAI076⟩. ⟨tel-01718584⟩

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