ME Seminar Series: Degradation and Life Prediction of Large Format Li-ion Cells

Feb 20

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Wednesday, February 20, 2013 - 11:30am to 1:00pm

The electrification of the drivetrain is crucial to solve our energy problems and fill the gap to sustainable and zero emission mobility. We are now within reach of mass-marketed vehicles using Li-based batteries. Full engineering analysis of batteries and battery systems must be regularized, and engineering development is needed to allow creation of products and tools for integration of battery systems into vehicles. Electric Vehicles (EV) and Hybrid Electric Vehicles (HEV) face significant battery-related challenges, including limited driving range and high battery cost resulting from the capacity fade of batteries during usage. The prediction of capacity fade and lifetime of batteries is important for cell design, determination of the optimal operation condition and control, and cell maintenance, and eventually the successful implementation of HEVs and EVs. Various mechanisms contribute to capacity fade, especially in large format cells which use multiple-material electrodes to enhance the performance. An integrated approach considering different aspects of the fading mechanisms is necessary. In this talk I will present some of our recent works on modeling the fading mechanisms in Li-ion batteries together with experimental investigations.