37-ecat E-Catalog
80-services Services
39-magazine Magazine
36-downloads Downloads
35-contact Contact
20-close First-Hand News?

Obtain news and background information about sealing technology, get in touch with innovative products – subscribe to the free e-mail newsletter.

Boost for E-Motors

Plymouth, MI (US), September 14, 2021. Freudenberg Sealing Technologies has developed a portfolio of advanced thermoplastic compounds for e-motor applications that provide these alternate powertrains with greater thermal conductivity and better electrically insulating properties. These new Thermally Conductive, Electrically-Insulating (TCEI) grades are especially important in the production of bobbins for e-motors. Bobbins molded from the new materials can be thinner, leaving more room for copper wiring which generates higher power densities in the motors. More innovative components and lithium-ion battery systems will be on display at the company’s booth at The Battery Show in Novi, Mich. (US), Sept. 14-16.

Plastics are often used in electric components and systems. For such applications, specifications, and requirements such as mechanical properties, temperature capabilities and thermal conductivity are considered in the material selection. In addition, the material must provide good electrical resistance to isolate the system for safety reasons.

In general, plastics offer good electrical resistance but are poor conductors of heat compared to metals. Losses in electric motors due to windage, friction, iron, and winding, for example, manifest as undesirable heat build-up that raises the temperature inside the motor. As a result, the optimal material would offer both high thermal conductivity and good electrical isolation to optimize motor performance. But such a material did not exist – until now.

Filling a Gap

“We saw the need for an enhanced material solution and, given Freudenberg’s polymer material expertise, set out to develop a new family of materials that directly addressed the challenges created in an e-motor environment,” said Ray Szparagowski, Engineering Fellow, High Performance Plastics at Freudenberg Sealing Technologies. “The multiple new grades of TCEI materials that we have developed outperform what’s currently available today.”

Newly developed thermoplastic compounds from Freudenberg provide improved thermal conductivity and electrically insulating properties for higher performance in electric motors.

In developing the materials, Freudenberg Sealing Technologies focused on engineering polymers used as bobbins or slot liners. Primarily used to provide insulation in the slot between the motor winding and the magnetic plate, bobbins also act as container for stator windings, help retain shape, provide rigidity, offer ease of assembly of the windings onto the stator core and help protect the windings from damage and vibration during assembly and operation.

The Power of Plastics

Engineered plastics are heavily influenced by filler reinforcements. Although unfilled polymers typically have a thermal conductivity of ~0.2 W/m/K, the appropriate choice of fillers can increase this value many-fold. Szparagowski and a team of material experts have successfully developed several material grades that enable Freudenberg to offer a customized solution that can be matched to specific application requirements. Each grade offers a unique blend of material characteristics (tensile strength and elongation properties) and physical attributes (electrical and thermal properties) achieved by adjusting the filler. The higher level of filler used in new TCEI grades result in a stiff material that can be molded in thin cross-sections. Thinner designs that use less material are now possible. And extensive material testing confirms their superior thermally conductive and electrically isolating properties.

Other Battery Show Offerings

Freudenberg Sealing Technologies and its lithium-ion battery company, XALT Energy, will showcase a wide range of components such as lithium-ion battery heat shields, edge-bonded foldable gaskets, DIAvent® and DIAvent® Light, eCon conductive seals, Plug&Seal connectors, fire resistant seals and EMI shielding products. XALT Energy will display several heavy-duty lithium-ion battery packs. Freudenberg and XALT Energy are sharing back-to-back booth numbers 2105 and 2101 on the show floor.

Ulrike Reich

Head of Media Relations & Internal Communications

Telephone: + 49 (0) 6201 960 5713

ulrike.reich@fst.com 32-caret

Cheryl Eberwein

Director, Corporate Communications

Telephone: +1 734 354 5373

cheryl.eberwein@fnst.com 32-caret

Download Press Release

Download Images

News Service

You can subscribe to the Freudenberg Sealing Technologies news alert service, bringing you the news as soon as they are published. You can always unsubscribe from this service.

Subscribe now! 32-caret

Login with your access data

* mandatory field

Forgot your password? Click here to reset.


Don’t have an account yet? Register now!

You've logged in successfully.

Register and get access to exclusive content

Your benefits

  • Download exclusive documents such as Solution Sheets
  • Live Webinare/On-Demand Recordings on the beverage and food industry
  • Virtual tours of production facilities
  • Resistance tools for selecting the right material

Security Level

* mandatory field


Do you already have an account? Continue to Login.

Thank you. Your subscription was successful.

We have sent you an e-mail. Please click on the included activation link to complete the registration.

We have sent you an email. Please click on the included link to assign a new password.

Have you forgotten your password?

Please enter your email address to reset it.

* mandatory field

The form has been successfully sent.

We have sent you an email. Please click on the included link to assign a new password.

Further Articles With These Taggings

Major Orders From Car Manufacturers: Huge Interest In DIAvent


Freudenberg Sealing Technologies triples production capacity for its intelligent pressure compensation element in Germany and the USA.

Read more 32-caret

Automotive E-Mobility

Running On 100 Percent Green Power


Freudenberg Sealing Technologies is inaugurating a new green plant in Parets del Vallès, Spain.

Read more 32-caret

Automotive Sustainability

Greater Safety for Lithium-ion Batteries


Freudenberg Sealing Technologies has introduced a product – DIAvent® – that ensures pressure equalization and emergency degassing of the battery housings of electric vehicles.

Read more 32-caret


A Very Hot Item: Thermoplastics For Up To 1,200 Degrees Celsius


Freudenberg Sealing Technologies develops extremely temperature-resistant plastics for electric cars.

Read more 32-caret

Automotive E-Mobility Material Expertise

Motor Scooters: Southeast Asia’s Top Choice for Transport


Motor scooters are tremendously popular in Southeast Asia. And especially in Indonesia. Why is that? And could the car industry benefit from the region’s economic upswing?

Read more 32-caret


Long Live The Battery!


Freudenberg Sealing Technologies produces one million foldable gaskets in Langres, France.

Read more 32-caret

Automotive E-Mobility

Thailand: Automotive Hotspot


Thailand is on the brink of becoming an industrial nation. The auto industry, among other sectors, is making this possible. How the country became the industry’s hotspot in Southeast Asia and what the future holds.

Read more 32-caret


Up-and-Coming Tiger Cubs


The world’s workshop may migrate from China to Southeast Asia. Still, the region has been on the brink of an economic breakthrough before. Why didn’t it take hold? And what is its situation today?

Read more 32-caret


What’s in The Box


Freudenberg Sealing Technologies installs advanced battery test lab at its North American headquarters.

Read more 32-caret

Automotive E-Mobility

First Hand News

Best of all, keep up with the latest developments
with the Freudenberg Sealing Technologies newsletter.

Subscribe now!