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Ultrasonic metal welding for lithium-ion battery cells

from EWI

The three most common metal-to-metal joints in a lithium-ion battery pack are foil-to-tab, tab-to-tab and tab-to-bus. All three joints pose joining challenges, but of the three, welding multiple layers of foil to a tab is the most challenging. The joint is often made up of dissimilar metals, the metal thickness is mismatched, and one side — the tab — is relatively thick while the other is made up of multiple, extremely thin, layers. more

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