Pressure compensation element for density test of housing

摘要

The invention first concerns a pressure compensation element (10) to compensate for pressure differences between an interior (I) of a housing (20),in particular an electric drive and/or electric machine and/or transmission and/or battery, for example for a vehicle, and an environment surrounding the housing (20). The pressure compensation element (10) can be attached to a housing opening (21) of the housing (20) and has a hydrophobic, air-permeable membrane (11).In order to allow for a simple, cost-effective and quick leak test, especially after assembly or during operation, the pressure compensation element (10) has a connection element fixed to the housing aperture (21) and a movable connector (12) with which: membrane (11) equipped or equipped membrane carrier element (13). Between the connecting element (12) and the membrane carrier element (13) a column sealable by a column seal (15) is formed. The column (14) is represented by a relativeMovement between the connecting element (12) and the membrane carrier element (13) can be increased. In an operating position, the column (14) is sealed by the column seal (15). Pressure differences can be compensated by the membrane (11) in the operating position. In a test positionIn particular for the leak test, the gap (14) is enlarged and the seal by the gap seal (15) is removed. Differences in pressure can be compensated in the test position by the column (14).