Lithium-Ion Battery aging mechanism during electrical driving operations and vehicle2grid functions

摘要

At present a trend towards an increasing hybrid an electric vehicle market can be seen very clearly, bringing the mobility sector and the energy supply sector together and offering new potentials to optimize the overall energy efficiency. Cars with Smart Charge and / or Vehicle2Grid (V2G) functionality act as smart loads so that their power demand is controlled automatically. Cars with V2G functionality can also contribute to the grid during the peak periods by providing power to the grid when the car is stationary and the battery unused. One of the most important tasks of the future is the development of a charging system which can provide grid stabilization functions at minimized battery degradation. For this reason three main issues have to address: Investigations of aging mechanism of lithium ion cells during rest and cycling (driving operation and grid stabilization operation), Development of the grid connection via a Vehicle2Grid On-Board-Charger (V2G-OBC) and 3) Verification of the V2G-functions versus battery degradation and making a proposal for a business concept. This paper is focused on the clarification of the basic aging mechanism during the expected use scenarios and the integration of these different processes into an existing Matlab/Simulink battery model.