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. Recent test results show stronger welds, less foil damage, and a reduction in required energy.
EWI is the leading engineering and technology organization in North America dedicated to developing, testing, and implementing advanced manufacturing technologies for industry. By matching our expertise to the needs of our clients, we help manufacturers innovate premium, game-changing solutions that deliver a competitive advantage in the global marketplace.
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