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Injection Seal Inspection

Examine battery cell injection seal welds with deep learning solutions

Cognex deep learning ensures injection seals are properly executed

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After a battery cell’s top cap has been welded and tested it is filled with the liquid electrolyte that conducts electrons within the battery. When filling is complete, the filling hole is welded closed. Because of the risk of heat damage to the anode, cathode, and electrolyte, this is done with a low-heat laser weld.

Any electrolyte contamination or welding flaws resulting in electrolyte leakage will lower cell efficiency. An electrical test of the filled and sealed cell could reveal the existence of a problem before the cell moves on to be installed in a module, but this method is not completely reliable. Proper assessment of the injection seal welds is key to the functionality and lifespan of the entire battery.

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