FST E-Mobility



Charged With the Expertise of a Technology Leader

The future will run on electricity. Not exclusively, but with increasing speed and power. For many reasons: Fossil materials are finite and becoming more expensive. Emissions rules for conventional internal combustion engines are becoming increasingly strict; it is proving to be more and more expensive to meet them efficiently. Urbanization is increasing. Cities are developing into metropolises throughout the world. They are plagued with the emissions of individual transportation, which so far has mostly relied on internal combustion engines. Political pressures are growing, and the first cities and countries are establishing driving bans for diesel cars – the harbingers of a fundamental watershed in automotive history

FST E-Mobility

No supplier in the auto sector can afford to swim against this current. But it is not nearly enough for Freudenberg Sealing Technologies to simply swim with the flow. As a leading technological and market partner, Freudenberg Sealing Technologies is setting new standards for sophisticated applications in sealing technology and electric mobility, among many other fields. Leading the way and actively helping to shape the transformation – those are the watchwords. With its unique materials and technology expertise, Freudenberg Sealing Technologies is superbly equipped for the challenge ahead and has already charted its course organizationally.

The long-term goal is to provide made-to-order, customer-specific products and systems for nearly all the components of an electric vehicle in close cooperation with customers. With a holistic understanding, Freudenberg Sealing Technologies strives for integrated solutions that ensure a future for sustainable mobility. They already include two-component parts, flat seals and Plug & Seals for batteries and their thermal management. Electric motors need mechanical seals, and Simmerrings® remain essential in the transmissions of electric cars.

Battery Electric Vehicle

The housings of sophisticated control electronics must be sealed as well. In short, products from Freudenberg Sealing Technologies are already helping to powerfully accelerate the continued development of electric mobility. And there are numerous starting points for a multitude of other technologically sophisticated solutions.

But it would be shortsighted to bet solely on E-Mobility. Freudenberg is proceeding on two tracks because the transformation of the auto business is occurring in different ways and at different paces worldwide. So it is still an important goal to make internal combustion engines more efficient with emissions-reducing products. The LESS initiative bundles innovations that reduce frictional losses, installation space and weight, for lower fuel consumption and emissions. The gas-lubricated mechanical face seal Levitex is a paramount example of this.

Our colleagues at Freudenberg Performance Materials and Freudenberg Filtration Technologies, along with  the Freudenberg Group website, are sources of still other solutions in the field of electric mobility.



Lithium Battery Heat Shields

Freudenberg Sealing Technologies heat shields are addressed to Lithium battery systems. Current battery system development trends such as increased energy density on the cell and system level, ultra-fast charging, and protection against traffic accidents require new approaches to improving systems safety.

The United Nations has instituted new standards for improved safety in EVs from 2021 and on. Facing this, we see a strong market pull for heat shields placed between the individual cells and/or around modules of a lithium battery. These shields avoid thermal propagation in case of a severe cell malfunction, or “thermal runaway”. Additionally, the thermal insulation of a broken cell protects the neighbored cells and thus avoids a fatal battery explosion.

Simmerring® with electrical conductive nonwoven

Electric motors in plug-in hybrid vehicles with an operating voltage of 400 volts are mostly found on the automatic transmission’s input shaft instead of a hydrodynamic converter. An electrical potential energy can build up between the housing and the shaft, which in extreme cases can lead to uncontrolled current flow and damage, particularly in the bearing area.

A standard Simmerring® can’t discharge electric potential energy. However, in the shaft seal with electrically conducting nonwoven, a charge is directed specifically through the conductive transmission seal from housing to the shaft. This does not allow electrostatic charges to arise.

Gasket for batteries

With the development of electric mobility, new applications are created for elastomer seals in batteries. Flat flange seals can be securely seal battery covers.

These seals are available in large dimensions to protect the entire battery unit from harmful environmental influences. Smaller “press-in-place” seals can be used in battery systems and seal components such as temperature control systems that optimize the battery’s performance.

2K Housing

Electrical components are exposed to enormous stress from weathering and vibrations in automobiles and must be protected accordingly. Housings with seals integrated in the cover in a 2K design serve a greater purpose than just static sealing. They also reduce dynamic stresses and are situated to provide tolerance compensation, even during large temperature fluctuations.

A component with a permanent injection-molded seal is more suitable for automatic final assembly, therefore yielding additional efficiency potential.

Profile to Gasket (P2G)

The sealing of housings in transmissions, engines, batteries and transformers is important for ensuring their functional reliability. The newly developed profile to gasket (P2G) is an extremely economical and technically efficient solution. The gasket profile which is manufactured as linear extrusion and is fabricated via water-jet cutting, can be tailored to each installation space.

The assembly of the complete profile in one piece avoids unnecessary joints even in very large, complex housings. P2G solutions can be implemented with suitable materials and in low piece counts.

Plug and Seal

Plug & Seal connectors ensure that liquids and gases can be transported without leakage in automobile and utility-vehicle engines. Plug & Seals are also the best option for electrical mobility and hybrids, as they provide high-performance thermal management of battery technology.

Fuel Cell Gaskets

A fuel cell produces electricity for an electric motor and the vehicle does not discharge anything other than pure steam. Fuel cell automobiles are a technically advanced alternative to battery-powered electric vehicles. To generate energy in this form safely and efficiently requires precision sealing solutions in the fuel cell stack.

Freudenberg has access to a global network and are experienced in the manufacturing of effective sealing components for fuel-cell stacks.

Pouch Cell Frame Seal

Large-scale lithium battery systems are already present in a variety of applications. Among these are automobiles with micro, full, and plug-in hybrids, as well as purely electrical vehicles. Fastening elements enable pouch cells to be reliably embedded in lithium-ion battery systems.

These battery systems are used in a variety of applications, both stationary and mobile. The cell frame ensures reliable embedding of the cell into the battery system and protects the pouch cell.


Our innovative DIAvent is the ideal pressure management solution intended for large-scale batteries in electric and hybrid vehicles. It is made up of a patented multi layer, nonwoven fabric combined with an umbrella membrane that allows DIAvent to intelligently and reliably handle the bi-directional pressure equalization of any battery, even in the harshest of operating conditions.

DIAvent provides extremely high gas permeation during normal operation and a reversible emergency degassing function while also meeting the requirements for water tightness according to protection category IP67 and higher.



Sustainable sealing solutions for less friction, weight, fuel consumption and emissions.


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