As the mobility industry rapidly evolves, Freudenberg continues to expand its portfolio with high-performance, application-specific solutions that enhance efficiency, reliability, and functionality in both current and next-generation vehicles. At the Battery Show North America, the company is highlighting three key innovations designed to solve industry challenges, including new battery pressure equalization components, advanced sealing for battery systems, and next-level thermal management for high-performance EVs.
The transition toward electrification brings new challenges to vehicle and equipment design in respect to pressure equalization. Lithium-ion battery housings must remain hermetically sealed for safety and performance yet also require specialized components to regulate internal pressure.
Freudenberg Sealing Technologies has addressed this need with its DIAvent® product portfolio — a patented family of solutions that offer pressure equalization during normal operation along with emergency degassing functions — tailored for different applications. The current portfolio offers a range of options, from compact, space-saving options for small and mid-sized battery systems, to high-capacity elements designed for larger, high-energy vehicles, as well as solutions for e-motors, axles, inverters and more.
Now, based on customer interest and feedback, Freudenberg has diversified the DIAvent® portfolio further with two new components offering these features:
- The DIAvent® maxFlow, which features an open degassing vent – rather than one that opens gradually – providing a full degassing rate near the opening pressure threshold and an activation level that can be adjusted between 50 and 200 mbar.
- The DIAvent® Hybrid, which combines permanent bidirectional pressure equalization with emergency degassing, with the added ability to mount the aluminum cover of the vent directly and firmly to the battery housing.
Both new components are suitable for use in high-energy-density battery systems. These additions broaden the DIAvent® scope of solutions, giving automakers and battery manufacturers greater flexibility and tailored functionality across a wide range of operating conditions.
Busbars, which are essential for energy transfer in battery systems, are notoriously challenging
to seal effectively due to their irregular geometries and the harsh conditions they are exposed to, such as aggressive fluids and temperatures. Freudenberg’s media-tight busbar sealing technology, suitable for both rectangular and round busbars, eliminates the need for additional assembly steps, significantly reduces leak risk, and enhances long-term durability.
As EV batteries grow in capacity and charging speeds accelerate, thermal management becomes increasingly critical. Conventional cooling systems often fall short in ultra-fast charging scenarios. To address this, Freudenberg’s advanced fluid connectors are engineered to accommodate a range of cooling fluids and thermodynamic demands, maintaining optimal cell temperatures and extend battery life. The fluid connectors help to deliver a system-level cost advantage through tolerance compensation, enabling simplified and efficient assembly processes, combining several functions into a single component.
“Our customers need agile and experienced partners who can rapidly deliver optimized materials and technologies as new challenges emerge,” said Tania Hagel, Global Vice President, OEM Sales, Freudenberg Sealing Technologies. “Our deep expertise in design and materials allows us to deliver tailored solutions that support electric mobility and accelerate the adoption of next-generation propulsion systems.” The Battery Show Booth 5208.
For more information, visit https://www.fst.com/markets/automotive-truck-bus/electric-vehicle/ .
