Mann+hummel Gmbh

Axel Liebendoerfer

Robert Zbiral

Thomas Jessberger

Markus Hanselmann

A degassing unit for an electronics housing is provided with a base body to be connected fluid-tightly to a rim of a pressure compensation opening of the electronics housing. The base body has at least one gas passage opening. A semipermeable membrane covers, in a normal operating state of the degassing unit, the at least one gas passage opening of the base body. The semipermeable membrane enables passage of gaseous media from an environment into the electronics housing and in reverse, but prevents passage of liquid media and/or solids. The degassing unit can be transferred into an emergency degassing state by release of at least one emergency degassing opening bypassing the semipermeable membrane for providing an emergency degassing gas path. A first monitoring device is provided for detecting whether the degassing unit is in the normal operating state and/or in the emergency degassing state.

Degassing unit, electronics housing, in particular battery housing, and motor vehicle

A degassing unit to be connected fluid-tightly to a pressure compensation opening of an electronics housing has a base body with gas passage opening. A semipermeable membrane, fastened fluid-tightly to a membrane carrier, allows gaseous media to pass from an environment into the electronics housing and in reverse but prevents passage of liquid media and solids. In normal operation, the membrane covers the gas passage opening. An axial seal circumferentially extends about the gas passage opening. The membrane carrier is moveable relative to the base body and, in normal operation, is pressed by axial force seal-tightly against the axial seal. The membrane carrier, when a predetermined pressure difference between housing interior and environment is surpassed, lifts off the base body to release an emergency degassing opening surrounding the membrane. The axial seal is a lip seal and made of a material softer than a material of the membrane carrier.

Growing community of inventors

Untergruppenbach, Germany

Axel Liebendoerfer