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Communication Dans Un Congrès Année : 2019

Off-line method of the separation of the electrodes equilibrium state of the Li-ion batteries

Karrick Mergo Mbeya
  • Fonction : Auteur
Nicolas Damay
Guy Friedrich
Christophe Forgez
Maxime Juston
  • Fonction : Auteur
  • PersonId : 1065697

Résumé

To ensure better performances of the Li-ion batteries in applications such as electric vehicles, the monitoring of their state with a BMS (Battery Management System) is required. To this end, non-invasive tools are needed to perform monitoring of the battery at the electrode scale. In this paper, we propose a method to extract from charge and discharge of the battery, the electrodes informations (equilibrium potentials, capacities and lithiation rates as functions of the battery state of charge). A pseudo-OCV model has been used to determine these informations. The proposed method allows to reduce the bias related to the battery overvoltage. Evaluated on a LFP/graphite lithium ion battery, the needed parameters were obtained with an accuracy of about 1 mV on the pseudo-OCV average (between discharge and charge) measurements of the battery. This method can be used for any battery chemestry.
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Dates et versions

hal-03282555 , version 1 (09-07-2021)

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  • HAL Id : hal-03282555 , version 1

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Karrick Mergo Mbeya, Nicolas Damay, Guy Friedrich, Christophe Forgez, Maxime Juston. Off-line method of the separation of the electrodes equilibrium state of the Li-ion batteries. ELECTRIMACS 2019, May 2019, Salerno, Italy. ⟨hal-03282555⟩
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