Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 166, Issue 3, Pages A5163-A5167Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0251903jes
Keywords
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Funding
- German Federal Ministry of Education and Research (BMBF) [03XP0069A]
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The electrolyte filling process constitutes the interface between cell assembly and formation of lithium ion batteries. Electrolyte filling is known as a quality critical and also time consuming process step. To avoid limitations in battery quality a homogeneous electrolyte distribution is necessary. Therefore, especially large sized cells are stored for hours. To accelerate filling and wetting processes the effect of materials- and process parameters on electrolyte distribution needs to be investigated. Unfortunately, in situ methods to characterize the filling and wetting state are still rare, limited in availability or even time-consuming in preparation. To overcome these drawbacks this paper introduces X-ray as an innovative method to visualize the electrolyte filling process in large scaled lithium ion batteries. Therefore, an experimental setup was developed to enable in situ X-ray measurements during the filling process of large scaled cells. Additionally, an evaluation process for the optical data was proposed. Based on these images the suitability of X-ray as visualization method is shown considering three exemplary filling parameters. (C) The Author(s) 2018. Published by ECS.
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