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How a new gap filler injection process improves pouch-cell module assembly.
Gap fillers or thermal interface materials (TIMs) are essential for operating electric and hybrid vehicle batteries. Their job – to transfer heat from the battery modules to a heat sink – depends on two critical factors: the thermal conductivity of the material used and the absence of air in the filled cavities.
Because battery modules generate heat while operating, thermally conductive gap fillers are used to prevent them from overheating. Together with its partner bdtronic, WACKER now presents a new injection process that will make the insertion of the silicones more economical, efficient, reliable and sustainable.
A new injection method allows manufacturers to install gap fillers right on the assembly line with no need for rework. bdtronic developed the process technology, which features an innovative method for detecting the proper degree of filling. This was then combined with a WACKER liquid silicone rubber that is ideal for processing via the new method and that delivers the needed thermal conductivity.
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