SoH evaluation of LiFePO4 cells using impedance and thermal measurements

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To access the full text documents, please follow this link: http://hdl.handle.net/2117/25519

dc.contributor	Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica
dc.contributor	Universitat Politècnica de Catalunya. GRUP ISI - Grup d'Instrumentació, Sensors i Interfícies
dc.contributor.author	Ovejas Benedicto, Victòria Júlia
dc.contributor.author	Cuadras Tomàs, Àngel
dc.contributor.author	Morante Lleonart, Joan Ramon
dc.date	2014
dc.identifier.citation	Ovejas, V.J.; Cuadras, A.; Morante, J. SoH evaluation of LiFePO4 cells using impedance and thermal measurements. A: International Multi-Conference on Systems, Signals and Devices. "Proceedings of the 11th International Multi-Conference on Systems, Signals and Devices -SSD 2014". Castelldefels: 2014, p. 1-6.
dc.identifier.citation	10.1109/SSD.2014.6808903
dc.identifier.uri	http://hdl.handle.net/2117/25519
dc.language.iso	eng
dc.relation	http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6808903&tag=1
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Àrees temàtiques de la UPC::Enginyeria electrònica
dc.subject	SoC
dc.subject	SoH
dc.subject	Li-ion battery
dc.subject	impedance
dc.subject	entropy
dc.subject	Bateries elèctriques -- Mesurament
dc.title	SoH evaluation of LiFePO4 cells using impedance and thermal measurements
dc.type	info:eu-repo/semantics/publishedVersion
dc.type	info:eu-repo/semantics/conferenceObject
dc.description.abstract	LiFePO4 is a promising cathode material used in Li-ion batteries. It offers better cyclability and is safer in terms of thermal runaway than previous LiCoO2 or LiMnO2 cathodes. With new applications as electric vehicles (EV) a reliable State-of-Charge (SoC) estimator becomes a must. Cell's degradation or State-of-Health (SoH) is crucial when determining SoC. We aim to find a parameter related to SoH in order to have realiable SoC indicators at any time or condition. Impedance, dynamic resistance and thermodynamics of cells with different degradation levels have been studied. Correlation of SoH and impedance of those cells is not found at a glance. In contrast, dynamic resistance, temperature and entropy show good agreement with SoH evolution.

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