EWI has developed a novel ultrasonic metal welding (UMW) knurl design which significantly improves the quality of foil-to-tab joints in lithium-ion battery cells. The new design allows multiple-layers to be joined in a single operation without pre-consolidation of the foils and without the use of buffer material or thicker sandwich foils.
Download this paper for a look at the unique process that is resulting in stronger welds, less foil damage, and a reduction in required energy.
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