Freudenberg Sealing Technologies is introducing a new generation of electrically conductive seals at the virtual 2021 Vienna Motor Symposium. The seals are designed to prevent bearing damage caused by electrically-induced corrosion and to decrease electromagnetic interference. The power semiconductors in an inverter are often positioned directly above the motor. Silicon carbide semiconductors, which are often… Read more »
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Freudenberg expands battery material testing facilities
Freudenberg Sealing Technologies has expanded its material testing capabilities to include performance and compatibility evaluations of the rubber, elastomers and thermoplastics used to seal and safely maintain lithium-ion batteries. The company has installed equipment and adopted new testing protocols in its Plymouth, Michigan Central Laboratory that will provide data on which materials optimally resist breakdown… Read more »
Freudenberg’s new quick-release valves for EV batteries
Freudenberg Sealing Technologies has introduced a new generation of DIAvent valves, which allow reaction gases to escape from damaged lithium-ion batteries. The valves also maintain the continuous pressure compensation required for normal battery operation. If a battery gets damaged, liquid electrolytes can escape into the battery housing as hot gases. These must then be released… Read more »
Freudenberg develops thermally conductive elastomer for EVs
Engineers at Freudenberg Sealing Technologies have developed an elastomer that merges relatively high heat capacity with electrically insulating properties by combining silicone rubber with special fillers. Electronic components can be mounted in a thermally conductive aluminum housing, which dissipates heat through cooling water or convection. Senior Application Manager Armin Striefler explains why Freudenberg decided to… Read more »
The battery that breathes—Freudenberg’s pressure compensation system
EV batteries require pressure compensation both under normal operation and during emergency ventilation. Freudenberg Sealing Technologies’ DIAvent component combines these two functions into a single design, which will be used in the ABT e-Caddy and ABT e-Transporter, two Volkswagen vans that are popular in Europe and Mexico. To reduce battery weight and size, ABT uses… Read more »
Freudenberg launches new conductive seals for electric powertrains
Freudenberg Sealing Technologies is launching a new line of conductive seals that are designed to allow for durable connections between housings and shafts, while preventing bearing damage from electricity and electromagnetic radiation. The first functional models should be available within the next few months. Tim Leichner, Head of Strategic Product Advance Development at Freudenberg, said,… Read more »
Freudenberg develops lightweight plastic housing to seal against electromagnetic radiation
Researchers at Freudenberg are developing a plastic housing material for EV electronics as an alternative to heavier and more costly aluminum. To protect against electromagnetic waves that can disrupt signal flow in microprocessors and transmitter-receiver systems, EV makers typically encase electrical components in conductive metal housings, usually aluminum. Freudenberg says the additional weight of the… Read more »
Freudenberg introduces new testing tools for high-rpm seals in electric motors
Freudenberg Sealing Technologies has introduced several specially-designed test stands to measure frictional torque in shaft seals used in electric motors. The stands, which are located in its Weinheim test facility, can measure at rotational speeds up to 36,000 rpm. Freudenberg says that seals used between electric motors and downstream transmissions must withstand higher speeds and… Read more »
Freudenberg acquires majority share of XALT Energy
Freudenberg Sealing Technologies has acquired a majority share of XALT Energy, a manufacturer of battery solutions for heavy-duty EVs. XALT produces high-energy storage solutions for industries including automotive, rail, marine, industrial operations, and commercial transportation. The majority stakeholder acquisition comes with a multi-million dollar investment that will allow XALT to increase production at its Michigan… Read more »
Freudenberg develops foldable and fireproof battery seals
Freudenberg Sealing Technologies has developed a seal for Li-ion batteries that not only resists fire but “folds” to offer extra protections. Here’s how it works: fixed aluminum elements are equipped with a sealing profile on their outer edges to not only provide stability but also integrate mounting points for the clips used to attach the… Read more »