Silicone-free gap filler for electric vehicles

April 16, 2019 //By Christoph Hammerschmidt
Silicone-free gap filler for electric vehicles
Chemical company Henkel AG has announced the introduction of several technologies that enable cost-efficient large-scale assembly and lifetime protection of battery architectures.

Against the background of the automotive industry developing and launching an increasing number of electric vehicle (EV) models, Henkel intends to leverage its technology base and many years of expertise and experience to drive the transformation from traditional engines to electrified powertrains. The company has identified three major challenges for battery manufacturers: cost-efficient processes and technologies allowing high-speed assembly of cells; ensuring reliable thermal management for operational safety and meeting the UL94 flammability standard; and allowing serviceability of battery packs.

With a comprehensive range of technologies and know-how tailored to solving these new challenges, Henkel plans to establish itself as a full-solutions partner, supporting its customers from design to integration. Henkel’s solutions and services are focused on eight integrated key technologies that combine existing with new solutions. Some notable examples include:

  • Battery assembly adhesives:
    Henkel offers multiple adhesives that are especially suitable for large scale assemblies of hundreds and thousands of battery cells by UV curing in less than 15 seconds. The technology is suited for battery designs with cylindrical, pouch or prismatic cells
  • Thermal interface materials (TIM) – thermal gap filler and thermal adhesives:
    To ensure safe and efficient thermal management of the battery cells and modules, Henkel has a broad portfolio of TIM products, including silicone-free Bergquist Gap Fillers. During the Stuttgart Battery show from May 7-9, Henkel plans to launch a line of silicone-free, automation-friendly liquid gap fillers, with the debut product offering a thermal conductivity of 3.0 W/m-K. Furthermore, Henkel offers Gap Pad and Sil Pad materials for batteries, as well as thermal adhesive solutions which provide structural shear strength of >10 MPa, allowing different coefficients of thermal expansion to be overcome through high elongation.
  • Liquid gasketing:
    For the protection of the battery packing housing against leakages, Henkel provides different liquid gasketing technologies that are applied by automated robot. For serviceability or repair, these technologies also allow the top cover of the pack to be reopened.

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