A systematic method for accelerated aging characterization of lithium-Ion cells in automotive applications

摘要

For the design of automotive battery systems, cell selection is a mandatory first step. Since lithium-ion cells bear the disadvantage of a progressive degradation process during utilization, aging characterization enables the quantification of the related phenomena. In order to achieve low development costs and due to the long-term character of cell aging, aging characterization must be conducted in an accelerated manner. This work proposes a new method for this purpose of application that is able to reproduce realistic automotive cell aging in a short time and simultaneously to guarantee consistency in the involved aging mechanisms. This method therefore combines state of the art test approaches with viable and previously unused test and evaluation concepts. As concept paper, this publication focuses on the development procedure for this new method. Summaries of results regarding identified acceleration potentials for aging characterization are also presented.