Capacity Distribution of Large Lithium‐Ion Battery Pouch Cells in Context with Pilot Production Processes. Issue 2 (9th May 2019)

• Record Type: Journal Article
• Authors: Hoffmann, Louisa; Grathwol, Jan-Kirsten; Haselrieder, Wolfgang; Leithoff, Ruben; Jansen, Tobias; Dilger, Klaus; Dröder, Klaus; Kwade, Arno; Kurrat, Michael
• Other Names: Kwade Arno guestEditor.
• Is Part Of: Energy technology. Volume 8:Issue 2(2020:Feb.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-05-09
• Subjects: capacity distribution -- large pouch cells -- laser cutting -- lithium-ion battery cells -- physical and electrochemical cell properties -- pilot cell production -- Z-folding; Energy development -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1002/ente.201900196
• Languages: English
• ISSNs: 2194-4288

Abstract

Abstract : The increasing relevance of automotive lithium‐ion battery cells spotlights the importance of economic production in a high quantity. In this context, production technology for large battery formats is of great relevance. Therefore, it is necessary to identify effects on important cell properties, and based on this, develop an understanding of the interaction between process parameters and product properties. Large‐format cells are not comprehensively examined, particularly, in a large sample size, analyzing cell properties in terms of distributed values. Hence, there is so far no statistical data concerning large‐format batteries and their distributed discharge capacity and self‐discharge. For this reason, and in contrast to other studies, the scope of this work is to investigate a large sample size of 79 industrial‐scale 9 Ah battery cells to ensure statistical relevance and generate distributed data of cell properties. For this purpose, a large number of cells are produced and extensively electrochemically investigated. Subsequently, the essential parameters are correlated with the electrode parameter of carbon black particle size. Hence, the foundation for this process–product–property relationship is laid. Abstract : A large number of battery cells are produced and extensively electrochemically investigated. Thus, a deep understanding of each process step within the production chain, and their resulting cell properties, is required. In contrast to other studies, the scope of this study is to investigate a large sample size of industrial‐scale battery pouch cells to ensure statistical relevance and generate distributed data of cell properties.