W. L. Gore & Associates Launches GORE^® Battery Vents – MultiVent Series at the Battery Show

GORE MultiVent handles all three functions in a single part mounted through one opening, using two valves and a Gore microporous membrane:

• Pressure equalization. In normal operation, the valve opens at defined pressures which, combined with the membrane, allows the pack to breathe while blocking water, dust and debris. Airflow of 1,200 L/h at 100 mbar pressure – up to six times that of alternative venting options – allows for higher airflow per vent, reducing the number of vents a pack needs.
• Moisture protection. In Gore laboratory testing at 22 °C and 50 percent relative humidity, moisture ingress measured less than 20 mg per day, under one-tenth that of many commercially available dual vents – addressing an inherent venting tradeoff.
• Thermal-runaway evacuation. The larger valve opens at 50 mbar, providing an evacuation flow of 50 L/s at 180 mbar, and then reseals the housing. Gore testing shows MultiVent consistently performs after standard automotive aging tests and can resist typical thermal runaway temperature exposure.

“For years, battery pack designers have been forced to balance airflow, moisture control and safety using separate components,” said David Slupe, Strategic Marketing Leader for Batteries at W. L. Gore & Associates. “We think those challenges are connected. GORE MultiVent gives engineers a way to address them together with a simpler architecture. By combining Gore’s decades of experience in venting, moisture management and materials science with Vernay’s valve innovation and expertise, we’re helping customers design safer, more reliable battery systems.”

Gore application engineers work with pack design teams early in a program. Gore’s simulation models have closely matched measured moisture performance in validation testing, which helps customers assess an application before committing to extensive prototype testing.

For more information, visit gore.com/multivent.