# US 11,309,549 B2 · Bipolar plate for a fuel cell and fuel cell > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,309,549 B2 - Document ID: US11309549B2 - Status: Granted - Kind: B2 - Application number: 16/468,490 - Filed: 2017-11-30 - Published: 2019-10-31 - Granted: 2022-04-19 - Earliest claimed: 2016-12-12 - Assignees: Robert Bosch GmbH - Applicants: Robert Bosch GmbH - Inventors: Ulrich Berner; Jan Hendrik Ohs; Stefan Schoenbauer - Web page: https://patentgrep.com/patent/US11309549B2 ## CPC - H01M 8/0245: in the form of layered or coated products - H01M 8/0258: characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant - H01M 8/0232: Metals or alloys - H01M 8/0234: Carbonaceous material - H01M 8/0239: Organic resins; Organic polymers - H01M 8/1004: characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence) - Y02E 60/50: Fuel cells - 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 The invention relates to a bipolar plate (40) for a fuel cell, comprising a first distributing region (50) for distributing a fuel to a first electrode (21) and a second distributing region (60) for distributing an oxidant to a second electrode (22). At least one woven fabric (80) is provided in at least one of the distributing regions (50, 60). The invention further relates to a fuel cell, comprising at least one membrane electrode assembly (10) having a first electrode (21) and a second electrode (22), which are separated from each other by a membrane (18), and comprising at least one bipolar plate (40) according to the invention. ## Claims ### Claim 1 A bipolar plate (40) for a fuel cell (2), the bipolar plate (40) comprising a first distributing region (50) for distributing a fuel to a first electrode (21), a second distributing region (60) for distributing an oxidant to a second electrode (22), and at least one woven fabric (80) in at least one of the distributing regions (50, 60), characterized in that the woven fabric (80) has a first fiber (81) containing metal, wherein the woven fabric (80) has a second fiber (82, 83) having a different overall composition from the first fiber (81). ### Claim 2 (depends on 1) The bipolar plate (40) as claimed in claim 1, characterized in that the woven fabric (80) is porous. ### Claim 3 (depends on 1) The bipolar plate (40) as claimed in claim 1, characterized in that the woven fabric (80) is electrically conductive. ### Claim 4 (depends on 1) The bipolar plate (40) as claimed in claim 1, characterized in that the second fiber (82) contains carbon. ### Claim 5 (depends on 1) The bipolar plate (40) as claimed in claim 1, characterized in that the second fiber (83) contains plastic. ### Claim 6 (depends on 1) The bipolar plate (40) as claimed in claim 1, characterized in that at least two woven fabrics (80) are stacked one above another in the at least one of the distributing regions (50, 60). ### Claim 7 A fuel cell (2) comprising at least one membrane electrode unit (10) with a first electrode (21) and a second electrode (22) which are separated from one another by a membrane (18), and at least one bipolar plate (40) comprising a first distributing region (50) for distributing a fuel to the first electrode (21), a second distributing region (60) for distributing an oxidant to the second electrode (22), and at least one woven fabric (80) in at least one of the distributing regions (50, 60), characterized in that the woven fabric (80) has a first fiber (81) containing metal, wherein the woven fabric (80) has a second fiber (82, 83) having a different overall composition from the first fiber (81). ### Claim 8 (depends on 7) The fuel cell as claimed in claim 7, characterized in that the woven fabric (80) is porous. ### Claim 9 (depends on 7) The fuel cell as claimed in claim 7, characterized in that the woven fabric (80) is electrically conductive. ### Claim 10 (depends on 7) The fuel cell as claimed in claim 7, characterized in that the second fiber (82) contains carbon. ### Claim 11 (depends on 7) The fuel cell as claimed in claim 7, characterized in that the second fiber (83) contains plastic. ### Claim 12 (depends on 7) The fuel cell as claimed in claim 7, characterized in that at least two woven fabrics (80) are stacked one above another in the at least one of the distributing regions (50, 60). ### Claim 13 (depends on 7) The fuel cell as claimed in claim 7, wherein the at least one fiber (81) is a metallic fiber. ### Claim 14 (depends on 1) The bipolar plate (40) as claimed in claim 1, wherein the at least one fiber (81) is a metallic fiber. ### Claim 15 (depends on 1) The bipolar plate (40) as claimed in claim 1, wherein the second fiber (82, 83) contains a second material that is different from metal. ### Claim 16 (depends on 1) The bipolar plate (40) as claimed in claim 1, wherein the second fiber (82, 83) does not contain metal. ### Claim 17 (depends on 4) The bipolar plate (40) as claimed in claim 4, wherein the woven fabric (80) has a third fiber (83) having a different overall composition from the first fiber (81) and the second fiber (82), and wherein the third fiber (83) contains plastic. ### Claim 18 (depends on 7) The fuel cell as claimed in claim 7, wherein the second fiber (82, 83) contains a second material that is different from metal. ### Claim 19 (depends on 7) The fuel cell as claimed in claim 7, wherein the second fiber (82, 83) does not contain metal. ### Claim 20 (depends on 10) The fuel cell as claimed in claim 10, wherein the woven fabric (80) has a third fiber (83) having a different overall composition from the first fiber (81) and the second fiber (82), and wherein the third fiber (83) contains plastic.