Thermal Interface Materials
Gap fillers, greases and pads that couple heat from cells, inverters and e-motors into cold plates.
Overview
Thermal interface materials (TIMs) are the greases, gap fillers, pads and phase-change compounds that sit between a hot component and a heat sink or cold plate. In automotive they are specified for battery modules, traction inverters, onboard chargers and e-motor windings — anywhere air gaps would throttle heat flow. Silicone rubber and silicone sealants exist in the library; those are gaskets and FIPG, not TIM products. Automotive TIMs are typically silicone or non-silicone polymer filled with ceramic or metal-oxide powders, supplied as dispensable gap filler, cure-in-place, pad or grease. Electrical isolation versus conductivity is a separate specification from thermal conductivity. They are not structural adhesives and not potting compounds, though the chemistries overlap. The buyable material is the TIM system, not the cold plate.
Automotive Applications
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Properties
Category
Type
TIM / Gap Filler
Available Forms
Key Properties
- High thermal conductivity polymer compound
- Fills air gaps to a cold plate
- Dispensable, pad or grease form
- Distinct from silicone gaskets and sealants
- Isolation or electrically conductive grades
- Not a structural adhesive