# US 2026/0074366 A1 · Filter device and battery housing with filter device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0074366 A1 - Document ID: US20260074366A1 - Status: Published application - Kind: A1 - Application number: 19/312,375 - Filed: 2025-08-28 - Published: 2026-03-12 - Earliest claimed: 2024-09-09 - Assignees: Mann+Hummel GmbH - Applicants: MANN+HUMMEL GmbH - Inventors: Robert ZBIRAL - Web page: https://patentgrep.com/patent/US20260074366A1 ## CPC - B01D 46/0005: {Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence)} - H01M 50/394: {Gas-pervious parts or elements} - B01D 46/10: Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces - H01M 50/14: for protecting against damage caused by external factors - H01M 50/147: Lids or covers - H01M 50/186: characterised by the disposition of the sealing members - H01M 50/249: specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) - H01M 50/308: Detachable arrangements, e.g. detachable vent plugs or plug systems - B01D 2271/02: Gaskets, sealings - H01M 2200/20: Pressure-sensitive devices - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using batteries - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A filter device for filtering a fluid stream of a battery housing, for example of a traction battery of a motor vehicle, the filter device including a circumferential extending cover including a fluid passage and surrounding an interior space, and a filter element at least partially filling the interior space, the fluid passage being for fluid passing through the filter element. The cover being configured to accommodate a seat for the filter element via a circumferential extending filter sealing element, and to accommodate a seat for a circumferential extending sealing element. ## Claims ### Claim 1 A filter device for filtering a fluid stream of a battery housing, the filter device comprising: a circumferential extending cover comprising a fluid passage and surrounding an interior space; and a filter element at least partially filling the interior space, wherein the cover is configured to accommodate a seat for the filter element via a circumferential extending filter sealing element, and to accommodate a seat for a circumferential extending sealing element. ### Claim 2 (depends on 1) The filter device according to claim 1, wherein the cover comprises a shoulder configured to support the filter sealing element for sealing the filter element. ### Claim 3 (depends on 1) The filter device according to claim 1, further comprising a filter support element supporting the filter element at a downstream side against a flow of the fluid stream. ### Claim 4 (depends on 3) The filter device according to claim 3, wherein the filter element is connected to the filter support element by the filter sealing element. ### Claim 5 (depends on 2) The filter device according to claim 2, further comprising: a circumferential sealing support element arranged between the filter sealing element and the shoulder and configured to support the filter sealing element; and an intermediate plate extending from the filter support element, wherein the filter sealing element is compressed between the sealing support element and the intermediate plate. ### Claim 6 (depends on 2) The filter device according to claim 2, further comprising an intermediate plate, wherein the filter sealing element is compressed between the shoulder and the intermediate plate. ### Claim 7 (depends on 1) The filter device according to claim 1, wherein the cover further comprises a fluid outlet in a circumferential direction, or wherein the cover further comprises a fluid inlet in an axial direction. ### Claim 8 (depends on 1) The filter device according to claim 1, wherein the cover further comprises a circumferential rim configured to accommodate the seat for the sealing element configured to be arranged circumferentially between the rim (24) and the battery housing. ### Claim 9 (depends on 7) The filter device according to claim 7, further comprising at least one labyrinth element configured to protect the fluid outlet against environmental impacts. ### Claim 10 (depends on 1) A battery housing comprising: a pressure relief valve; the filter device according to claim 1; and at least one opening, wherein the pressure relief valve is mounted at the at least one opening and is configured to open the fluid passage of the cover of the filter device when a predetermined excess pressure in the battery housing is reached or exceeded, and wherein a rear side of the cover is mounted in a substantially fluid tight manner to the at least one opening. ### Claim 11 (depends on 10) The battery housing according to claim 10, wherein the cover is installed outside the battery housing, and wherein the filter device further comprises a separation screen comprising screen openings across the at least one opening, the separation screen being mounted to the pressure relief valve, and wherein the pressure relief valve is arranged between the separation screen and the filter element. ### Claim 12 (depends on 11) The battery housing according to claim 11, wherein the pressure relief valve is at least partly accommodated in the interior space of the cover. ### Claim 13 (depends on 10) The battery housing according to claim 10, wherein the cover is installed inside the battery housing, and wherein the filter device further comprises a separation screen arranged at the cover. ### Claim 14 (depends on 13) The battery housing according to claim 13, wherein the separation screen comprises screen openings across the fluid passage of the cover. ### Claim 15 (depends on 10) The battery housing according to claim 10, further comprising: a second opening; and an overpressure valve arranged at the second opening and configured to open at a pressure greater than the predetermined excess pressure of the relief valve and to provide a bypass fluid flow path from an interior of the battery housing to an environment, the bypass fluid flow path bypassing at least the filter element.