New VESTAMID® polyamide 12 compound with highest fire protection for busbars in high-voltage batteries of electric vehicles

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Power busbars with VESTAMID insulation
  • Use for insulation up to 1000 V and above
  • Fire protection class V-0 with halogen-free flame retardants according to IEC 60754
  • RAL 2003 signal orange

Essen/ Marl, Germany. Evonik is expanding its portfolio of polyamide 12 compounds for insulating electrical conductors with the product VESTAMID® LX9050 OR. By using halogen-free flame retardants in accordance with IEC 60754, the compound meets the requirements for classification V-0 of its flammability according to UL94. Busbars insulated with the new RAL 2003 signal orange colored material can be used at elevated operating temperatures up to 125 °C.

Protection against electrical breakdowns
In the future, busbars made of copper or aluminum in high-voltage batteries of electric or partially electric vehicles will require even safer protection against electrical breakdowns up to 1000 V voltage and above, and the associated risk of fire. As required by the automotive industry, Evonik has developed the new polyamide 12 compound VESTAMID® LX9050 OR with halogen-free fire protection additives specifically for this purpose to achieve the highest possible fire resistance with flammability class V-0. A coating thickness of 0.5 – 0.7 mm meets the insulation requirements of e-mobility for busbar profiles from 30 mm2 to about 150 mm2. The RAL 2003 orange signal color indicates permanently and at first glance the high-voltage application.

The copper or aluminum profiles are coated by co-extrusion, and the favorable processing properties of VESTAMID® LX9050 OR also allow higher extrusion speeds. Adhesion to the metal core is excellent; adhesion promoters are not required. Due to the high elasticity of the compound, the coated busbars can be shaped very well after extrusion and even bent with small radii without losing the protective effect of the VESTAMID® insulation.

Products in any flammability classification
“With its highest flame retardancy, excellent insulating properties, and very favorable processing from extrusion to the finished molded busbar component, Evonik’s new high-performance plastic developed especially for e-mobility offers the possibility of making energy management in electric vehicles even more efficient and, above all, significantly safer,” says Eckart Ruban, who is responsible for e-mobility in Evonik’s High Performance Polymers Business Unit.

The compound is also suitable for processing in injection molding. Because of the halogen-free flame retardants used, it can also be used to manufacture other components for automotive electrics or for the electrical industry. The newly developed compound with a flammability classification of V-0 completes Evonik’s existing range of other RAL signal orange polyamide 12 products with V-2 and HB classifications.

VESTAMID® has been valued in the electrical and electronics industry for decades and is also used in cable insulation, among other applications.

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