Micro friction stir spot welding (uFSSW) for internal lithium-ion battery cell contacts
- Zens A. ,
- Vieltorf F. ,
- Sigl M.E. ,
- et al
- Zens A. ,
- Vieltorf F. ,
- Sigl M.E. and
- Zaeh M.F.
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This paper describes the goals and initial progress of the research project titled "qualification of micro friction stir spot welding for cell-internal contacting of large-format battery cells in a battery production environment (μKoBatt)", which focuses on the integration of the μFSSW process into the battery production chain. In this article, first, the battery cell geometry for which the process is to be developed is described. Next, experimental results of internal battery contact materials welded using μFSSW are presented. For this, various process parameters were employed and the welds were characterized using digital microscopy and surface profile measurements. Both aluminum and copper materials could be welded; however, several challenges arose. For instance, the build-up of aluminum onto the μFSSW tool hindered the repeatability of the process.
13th International Symposium, 21-23 May 2024, Session 11: FSSW, Paper 02
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