Degassing unit and electronics housing, in particular battery housing

US11804633B2 · kind B2 · utility

Assignee

• MANN+HUMMEL GmbH · DE

Inventors

• Robert Zbiral · Erbach, DE
• Axel Liebendoerfer · Untergruppenbach, DE
• Thomas Jessberger · Asperg, DE
• Markus Hanselmann · Kaufbeuren, DE

Key dates

• Filing date: Jun 25, 2021
• Grant date: Oct 31, 2023
• Expiry date: Jan 4, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/10
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

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.