Journal
Energy Technology
Volume 4, Issue 12, Pages 1502-1508Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ente.201600131
Keywords
bending stress; electrode; lithium ion battery; mechanical properties; winding
Categories
Funding
- Nds. Ministerium fur Wissenschaft und Kultur of the State of Lower Saxony
- Graduiertenkolleg Energiespeicher und Elektromobilitat Niedersachsen (GEENI)
Ask authors/readers for more resources
The industrialized winding of electrode-separator composites (ESCs; jelly rolls) applies bending stress to the winding mandrel. This affects the mechanical integrity of the substrate Q s coating and adhesion and may reduce the cycle stability and the battery life. Even though this motivates strong interest in the minimization of bending stress during production, there is no testing method available yet to characterize the composite such that process parameters can be derived. This article introduces a test method and apparatus for the effect of bending stress of electrodes. In this test method, electrodes are pulled over defined radii while the coating adhesion is observed continuously. This resembles the variation of the mandrel diameter and gives detailed insight into the limits of the allowed production parameter window. In a case study, a cathode material with Li(LiMnAl)(2)O-4 (LMO) as active material is selected as an example to show the effectiveness of the method.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available