DCFC Strategies for Automotive Li-ion Cells: Non Disruptive Electrochemical Analysis and Post-mortem Raman Characterization
摘要
The shift towards E-mobility transportation represents an important step to guarantee an ecological and energetic transition. To have a good market penetration of electric vehicles, however, we must consider the needs of consumers, who demand short charging times and a long battery life. The study and design of DCFC (direct current fast charging) profiles is fundamental to achieve this goal. In a previous work, new DCFC profiles based on Multi Stage Constant Current (MSCC) charge step were proposed. The new profiles have been designed with the aim of providing a fast charge that avoids the conditions in which the cell incurs in lithium plating. In this work the results of two characterization techniques are presented: Electrochemical Impedance and Raman Spectroscopies. The first confirms the advantage of using the customized profiles, without dismantling the cell, while the second confirms the absence of Li plating on the anode surface, after the teardown.