Lid Systems for Li-Ion Batteries

Leakage impacts battery capacity

For optimal performance in applications using lithium ion batteries, electrolytes must be prevented from leaking out of the battery cell and moisture must be kept from entering the cell. If the battery cell is not gas-tight, battery capacity will decrease over time and the improperly enclosed battery cell could also be damaged by the infiltration of atmospheric humidity.

Suppliers, manufacturers and customers alike all have an interest in minimizing capacity loss in the expensive batteries used in electric and hybrid electric vehicles.* 

A common cause of electrolyte loss is evaporation through the polymer seals of the battery terminals. Polymer, an organic material, ages naturally and can become brittle and lose gas-tightness over time.
GTAS® Battery Cell Lids

are a newly-developed technology that eliminates electrolyte loss and prevents moisture intrusion into lithium-ion battery cells by employing a special glass seal for the battery terminals, replacing the organic sealing material.

As a result, the battery terminals are hermetically sealed into the aluminium lid (GTAS: glass-to-aluminium seals) and protect the battery cell from moisture intrusion and electrolyte evaporation through the pin seals.

* Source: June 8, 2017 by Bill Koenig – Senior Editor
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Electronic Packaging
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