The new adhesive – Loctite TLB 9300 APSi – provides both structural bonding as well as thermal conductivity in the battery system. The breakthrough product has already been adopted by one of the world’s largest EV battery manufacturers.
Designed for applications such as bonding battery cells to modules, or bonding cells directly to cooling systems, Loctite TLB 9300 APSi is a two-component polyurethane thermally-conductive adhesive with a thermal conductivity of 3W/mK, moderate viscosity, and self-levelling characteristics. In addition to its heat management properties, it delivers what is described as a unique combination of good electrical insulation with high bonding performance to a variety of substrates.
It is a solvent-free solution that cures at room temperature without the need for additional energy consumption.
Due to its precise application, enhanced design flexibility and improved bond strength, the first-of-its-kind injectable thermally conductive adhesive offers the benefits of a simplified manufacturing process.
“Thermal management in EV batteries is still one of the biggest challenges for electrified mobility. New designs targeting higher energy densities in battery packs bring along the requirement for multifunctional thermally conductive adhesives instead of classical thermal gap fillers. Leveraging our strong innovation capabilities at Henkel, we have started to launch a family of materials varying in thermal conductivity, bonding strength, elasticity, and application methods to address those new requirements,” says Stephan Hoefer, global market strategy head for e-mobility at Henkel.
