Mann + Hummel Intellectual Property

A filter medium is provided, comprising a pre-filter layer made of staple fibers and a microfiber layer adhered to the pre-filter layer. The thickness of an adhesion interface is limited to a maximum of 30% of the total thickness of the pre-filter layer and the microfiber layer. Additionally, a method of producing the filter medium and a filter element designed for the filtration of cabin air, which filter element incorporates the filter medium, are described.

An emergency degassing unit (100) for degassing a battery housing, in particular a battery housing of a traction battery of a motor vehicle, the emergency degassing unit comprising a base body (10) and a valve unit (30) comprising a flexible valve keeper (32) and a closure element (34), the valve keeper being mounted with a mechanical preload force in an axial direction (16) to the base body, the closure element being configured to be in a closed position if a force acting on the closure element that is generated by a pressure in the battery housing is lower than the preload force of the valve keeper, and the closing element being configured to be in an open position if the force acting on the closure element generated by the pressure in the battery housing exceeds the preload force of the valve keeper, the emergency degassing unit further comprising a protective cover (26) arranged in the axial direction above the closure element, the protective cover being configured to limit a movement of the valve keeper in the axial direction when the closure element is in the open position.

A filter device (200) for filtering a fluid stream of a housing (60) of a battery, in particular of a traction battery of a motor vehicle, comprises a cover element (100) comprising a base section (110), a top section (150), and a fluid permeable fluid passage (22) for venting, the cover element (100) comprising an open end (112) at a free end (114) of the base section (110) and a closed end (156) at a free end (158) of the top section (150), and the base section (110) being connected to the top section (150), in particular being integral with the top section (150). The filter device (200) further comprises a filter arrangement (130) arranged between the free end (114) of the base section (110) and the free end (158) of the top section (150), and at least one pressure relief valve (160) arranged on the top section (150) and in an intended fluid flow direction (20) downstream of the filter arrangement (130). The filter arrangement (130) comprises a filter element (132) and a particle separator (134) arranged upstream of the filter element (132) in the intended fluid flow direction (20).

A filter device (200) for filtering a fluid stream of a housing (60) of a battery, in particular of a traction battery of a motor vehicle, comprises a cover element (100) comprising a base section (110) and a top section (150), that comprise a fluid passage (22) for venting, the cover element (100) further comprising an open end (112) at a free end (114) of the base section (110) and a closed end (156) at a free end (158) of the top section (150), and the base section (110) being connected to the top section (150). The filter device (200) further comprises a filter arrangement (130) arranged inside the cover element (100), in particular inside the top section (150), and a pressure relief valve (160) arranged in an intended fluid flow direction (20) downstream of the filter arrangement (130). The filter arrangement (130) comprises a filter element (132) and a particle separator (134) that are hollow, in particular round, the particle separator (134) being arranged upstream of the filter element (132) in the intended fluid flow direction (20).

An adsorber element (10), in particular for dehumidification of air, the adsorber element (10) comprising at least one pleated adsorber medium body (12, 14) circumferentially surrounding a rotational axis (16). Fold edges (18) of the at least one pleated adsorber medium body (12, 14) extend radial to the rotational axis (16).

A system (100) for cleaning exhaust of a fuel cell system (200), the system (100) comprising at least one reservoir (20) comprising a filtration cartridge (40) with adsorbent/absorbent material (42) configured to remove perfluoroalkyl and polyfluoroalkyl substances from the exhaust, and a release valve (50) connected to an outlet port (26) of the at least one reservoir (20).

A stack plate device (400) for a humidifier (1000), in particular for a fuel cell system, comprises stack plates (100) being stacked one on top of each other in a stacking direction (500), adjacent ones of the stack plates (100) being alternately rotated around a central axis (510), with a top side (126) of one stack plate (100) facing a bottom side (125) of an adjacent stack plate (100), each of the stack plates (100) comprising a peripheral frame (120), the peripheral frame (120) enclosing a through-opening (130) and comprising an inflow region (402) and an outflow region (404) opposing the inflow region (402) that are transverse to the stacking direction (500). The peripheral frame (120) of each of the stack plates (100) comprises inner connecting elements (140) and outer connecting elements (150).

Ein Filterelement (1) zum Filtern eines Fluids, insbesondere zum Filtern von Verbrennungsluft in einem Kraftfahrzeug und/oder zum Filtern von Betriebsmitteln eines Kraftfahrzeugs, umfasst ein Faltenpack (2), welches aus einem zickzackförmig gefalteten Filtermedium (9) mit durch Faltkanten (16) begrenzten Faltabschnitten (22) gebildet ist. Mindestens zwei direkt benachbarte Faltabschnitte (22A, 22B) sind entlang einer Klebelinie (21) durch eine Verklebung (23) mit Hilfe eines Klebstoffmaterials (24) miteinander verbunden, wobei die Klebelinie (21) zumindest abschnittsweise schräg zu der zwischen den zwei direkt benachbarten Faltabschnitten (22A, 22B) liegenden Faltkante (16A) verläuft oder entlang der zwischen den zwei direkt benachbarten Faltabschnitten (22A, 22B) liegenden Faltkante (16A) versetzt verläuft.

A sensor unit (20) for an air filter (1) configured to separate, from an air flow (3), at least one harmful gas, in particular for a fuel cell (2), the sensor unit (20) comprising a first sensor (21) and a second sensor (22), each of which comprising two electrodes (27, 28) and a material layer (30) connecting the two electrodes (27, 28), an electrical resistance of the material layer (30) changing when the material layer (30) comes into contact with the harmful gas, and the material layer (30) of the first sensor (21) being different from the material layer (30) of the second sensor (22), and a processing unit (23) configured to determine a time derivative of a change in the electrical resistance of the material layer (30) of at least the first sensor (21), and to generate an output signal (26) based on the determined time derivative.

An adsorber device (10) comprises a housing (12) comprising an adsorption channel (18) for guiding an adsorption fluid flow, and a desorption channel (20) for guiding a desorption fluid flow, and an adsorber element (14) being rotatable in relation to the housing (12) and being arranged partly in the adsorption channel (18) and partly in the desorption channel (20). When the adsorber element (14) is rotated, a body of rotation is formed. An inlet portion (22) of the adsorption channel (18) is for directing the adsorption fluid flow into a first circumferential portion (30) of a generated surface of the body of rotation, and an inlet portion (26) of the desorption channel (20) is for directing the desorption fluid flow into a second circumferential portion (32) of the generated surface of the body of rotation.