Title :
Study of graphite/NCA Li-ion cell degradation during accelerated aging tests — Data analysis of the SIMSTOCK project
Author :
Liu, Weiping ; Delacourt, Charles ; Forgez, Christophe ; Pelissier, Serge
Author_Institution :
Lab. de Reactivite et Chim. des Solides, Univ. de Picardie Jules Verne, Amiens, France
Abstract :
This paper presents a preliminary analysis of aging data from the French SIMSTOCK program in order to evaluate the influence of several aging factors on capacity fade and impedance increase of graphite/NCA Li-ion batteries over accelerated aging tests. Test protocols (cycling and check-up) are presented, and the behavior of battery under aging is described. An equivalent-circuit model is used to extract the various contributions of the impedance spectra. Finally, the influence of the aging factors on capacity fade and impedance increase is discussed.
Keywords :
ageing; data analysis; graphite; lithium; power engineering computing; protocols; secondary cells; C-LiNi1-x-yCoxAlyO2; French SIMSTOCK program; SIMSTOCK Project; accelerated aging tests; aging factors; data analysis; equivalent-circuit model; graphite-NCA lithium-ion cell degradation; impedance spectra; test protocols; Accelerated aging; Batteries; Impedance; Protocols; Resistance; System-on-a-chip;
Conference_Titel :
Vehicle Power and Propulsion Conference (VPPC), 2011 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-61284-248-6
Electronic_ISBN :
Pending
DOI :
10.1109/VPPC.2011.6043110
