Liπ
Rapid Test and Assessment of Li-Plating for Performance Improvement and Increased Operational Safety of Li-Ion Batteries
We are working together with TU Berlin on the topic “Rapid Test and Assessment of Li-Plating for Performance Improvement and Increased Operational Safety of Li-Ion Batteries” (Liπ) as part of a publicly funded project.
The two most important criteria for the acceptance of electric mobility are safety and range or recharging times. Higher range can generally be achieved through larger storage systems, but this comes with increased costs and greater energy consumption due to the higher weight. It is therefore much more effective to optimize fast charging capability, so that only short breaks are needed for recharging during long-distance travel, and charging times equivalent to the refueling time of a combustion engine can be achieved. From a cell perspective, the fast charging of a battery is mainly limited by the effect of lithium plating, which refers to the formation of metallic lithium. This can significantly shorten the lifespan of the cell and can also pose safety-critical risks.
The goal of the project is to build a deep understanding of Li-plating and, based on this, to develop a standardized rapid test for characterizing cells, in order to clearly identify their tendency to form Li-plating. The results of this rapid test can, for example, be provided as a datasheet specification (Lithium-Plating Index, abbreviated as Liπ) to significantly aid in the selection of the cell for the respective application, enable improved utilization of the cells, and thus offer advantages to the user.
