Thermally Conductive Materials for Electric and Hybrid Vehicle Batteries

Thermal Management of Electric Vehicle Power Sources

Responding to a strong and increasing demand in innovative manufacturing concepts for electric and hybrid vehicle batteries, Polytec PT provides adhesives, pottings and pastes with high thermal conductivities that are customized with regard to processing parameters, thermal and mechanical properties, and service durability. The need for power dissipation from the cell to the surrounding medium requires an ever effective thermal management in order to ensure an efficient, reliable and long-time operation of the components.

The assembly and integration of single hard-case (prismatic) or pouch cells to build a secure and durable battery system requires mechanical fixing, thermal management, and vibration damping. Conductive adhesives provide an ideal solution thanks to their:

  • Structural strength
  • Vibration resistance
  • Dielectric strength
  • High thermal conductivity
  • Good chemical resistance


Apart from batteries, there is an increasing demand for adhesive bonding, sealing and encapsulating of other electric and hybrid vehicle parts like motors, converters, control units, and power electronics devices. Regardless of the application, good thermal management improves durability of the end product and hence positively affects its energy efficiency and eco-friendliness.

Alternatives to Mechanical Fixing, Brazing and Welding

The new high thermally conductive products make adhesive bonding an increasingly attractive alternative to welding, soldering and mechanical joining. Especially the epoxy-based adhesives care for both structural strength and durability of the adhesive joint.

Thermally Conductive Materials from Polytec

Polytec provides both thermally conductive adhesives and silicon-free thermal pastes all with a design toward ease of use and durability. In coordination with customer and market requirements, we are constantly developing new, improved materials with high thermal conductivities towards 2 W/mK and more, customized to the respective application.

Thermally Conductive Adhesives and Pottings

Product Code

Polytec TC 417

Polytec TC 452

Polytec TC 418


Potting of large cavities, excellent chemical and moisture resistance

Bonding and sealing, rapid curing    

High thermal conductivity, slightly flexible


Flowable black paste

Thixotropic soft black paste

High viscous flowable gray paste

Cure Schedule

24 hours @23 °C

16 hours @23 °C handling strength: <1 h @45 °C

48 hours @23 °C

Operating Temperature Range

-55 °C ... 180 °C

-55 °C ... 180 °C

-55°C ... 160 °C

Thermal Conductivity

0.8 W/mK

0.8 W/mK

1.6 W/mk

Your Contact

Thermally Conductive Materials
Mr. Manuel Heidrich

Tel. +49 7243 604-4000