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Development of operational strategies for lithium ion batteries to guarantee a safe and lifetime optimized performance

Dreizler, Andreas und Fitz, Oliver Sebastian und Wagner, Norbert und Friedrich, K. Andreas (2017) Development of operational strategies for lithium ion batteries to guarantee a safe and lifetime optimized performance. Kraftwerk Batterie 2017, 28.-30. März 2017, Aachen, Deutschland.

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Kurzfassung

Important hurdles for the market launch of different types of lithium ion batteries are operation security, long calendar life, cycle durability and fast-charging capability. The main focus of this work is to identify unfavorable operation and environmental conditions which generally accelerate cell degradation such as c-rates during cycling, load profiles and temperature. All experiments are performed with different electrode materials assembled in self-build coin cells (LIR2032 body). In order to run batteries in a secure and lifetime optimized way, it is essential to determine the state of charge (SOC) and the state of health (SOH) accurately. A useful method to detect increasing cell resistances during cell operation is electrochemical impedance spectroscopy (EIS). One main reason for increasing ohmic resistances during load cycling is attributed to a growing solid electrolyte interface (SEI) located at the phase boundary between graphite anode and electrolyte. In this work we present first results of EIS measurements as a function of different operating parameters. Thereby, a useful tool to interpret EIS spectra is to use suitable equivalent circuits to simulate battery components, chemical reactions and mass transfer limitations. In addition, accelerating rate calorimetry (ARC) is used to measure the influence of exothermic reactions inside the battery and externally supplied heat in order to simulate unwanted side reactions and environmental conditions such as solar irradiation. Common methods that are used in our work are heat-wait-search and isothermal ageing to investigate the thermal cell behavior. As a supplement to the presented ARC measurements, thermogravimetric analysis (TGA) helps to allocate exothermic reactions during cell operation to different battery components.

elib-URL des Eintrags:https://elib.dlr.de/111656/
Dokumentart:Konferenzbeitrag (Poster)
Titel:Development of operational strategies for lithium ion batteries to guarantee a safe and lifetime optimized performance
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Dreizler, Andreasandreas.dreizler (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Fitz, Oliver SebastianOliver.Fitz (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Wagner, Norbertnorbert.wagner (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Friedrich, K. Andreasandreas.friedrich (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:28 März 2017
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Lithium ion battery, Lithium-Ionen-Batterie, LiB, Zelle, cell, aging, Alterung, operational stratergy, Betriebsstrategie, ARC, TGA, Impedanz, impedance
Veranstaltungstitel:Kraftwerk Batterie 2017
Veranstaltungsort:Aachen, Deutschland
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:28.-30. März 2017
Veranstalter :Haus der Technik
HGF - Forschungsbereich:Energie
HGF - Programm:Speicher und vernetzte Infrastrukturen
HGF - Programmthema:Elektrochemische Energiespeicher
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E EV - Energieverfahrenstechnik
DLR - Teilgebiet (Projekt, Vorhaben):E - Elektrochemische Prozesse (Batterien) (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Thermodynamik > Elektrochemische Energietechnik
Hinterlegt von: Dreizler, Dr. Andreas
Hinterlegt am:29 Mär 2017 10:17
Letzte Änderung:31 Jul 2019 20:08

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