KACO has further developed its quick-venting modular system for battery deflation. The products include reversible and irreversible solutions with a configurable breathing membrane. If an unintentional fault occurs in the traction battery of an EV or hybrid, rapid emergency venting is needed to reduce the pressure in the affected battery segment. Depending on customer specifications, the emergency venting must either open irreversibly, permanently releasing the venting cross-section, or the maximum required venting cross-section must be closed again tightly after the pressure surge. The battery also needs continuous pressure equalization during normal operation. 

Pressure balance units (PBUs) are either installed as a separate component or included in the quick-venting system itself as an additional function. KACO offers a separate PBU, a reversible battery quick deflation with or without integrated PBU, and an irreversible battery quick deflation with or without integrated PBU. To improve electromagnetic compatibility, a metal grid can be installed to improve the shielding effectiveness and provide protection against contact with the inside of the battery when the emergency vent is open.

The quick deflation feature can be installed according to customer specifications, and the current modular system includes options for snap-in, bayonet or screw-on mounting. All options are suitable for end-of-line testing, and the reversible design can also be used to test the outflow behavior in the event of a fault. 

KACO VP Andreas Genesius said, “With the further development of quick deflations for battery systems, KACO offers solutions required to ensure continuous pressure equalization as well as quick emergency venting of traction batteries.”

Source: KACO