Electric batteries, Vol. 7, Pages 48: Identification of Degradation Systems by Post-Mortem Analysis for the purpose of High Power and Cardio Commercial Li-Ion Cells right after Electric Vehicle Aging
Batteries doi: 10. 3390/batteries7030048
Writers: Kuntz Raccurt Azaïs Richter Waldmann Wohlfahrt-Mehrens Bardet Buzlukov Genies
Powered by the rise associated with the electric automotive business, the Li-ion battery market is in strong development. This technology does not really only fulfill the specifications of electric mobility, but is also found in most portable electric devices. Even though Li-ion batteries are known for their numerous advantages, these people undergo serious performance degradation during their aging, plus more particularly if used inside specific conditions for example at low temperature or great charging current rates. Based on the operational conditions, different aging mechanisms are usually favored and can induce physical and chemical modifications of the internal parts, leading to performance corrosion. In this article, the identification from the degradation systems was carried out thanks to an in-depth ante- and post mortem study upon three high power plus high energy commercial eighteen, 650 cells. Li-ion cellular material were aged using a battery electric vehicle (BEV) aging profile at −20 °C, 0 °C, 25 °C, and 45 °C according to the international standard IEC 62-660, and in calendar aging mode on 45 °C and SOC 100%. Internal components recovered from fresh and classic cells were investigated through different electrochemical (half-coin cell), chemical (EDX, GD-OES, NMR), and topological (SEM) portrayal techniques. The influence associated with power and energy cells’ internal design and Cuando content within the negative electrode on cell aging provides been highlighted vis-à-vis the particular capacity and power diminish.