# US 10,483,560 B2 · Single cell of fuel cell > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,483,560 B2 - Document ID: US10483560B2 - Status: Granted - Kind: B2 - Application number: 15/794,307 - Filed: 2017-10-26 - Published: 2018-05-10 - Granted: 2019-11-19 - Earliest claimed: 2016-11-09 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Nobuaki Nonoyama; Masaya Kobayashi - Web page: https://patentgrep.com/patent/US10483560B2 ## CPC - H01M 8/026: characterised by grooves, e.g. their pitch or depth - H01M 8/0263: having meandering or serpentine paths - H01M 8/1004: characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence) - H01M 8/1007: with both reactants being gaseous or vaporised (H01M8/12 takes precedence) - H01M 8/0273: with sealing or supporting means in the form of a frame - H01M 2008/1095: {Fuel cells with polymeric electrolytes} - 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 A single cell of a fuel cell has: a membrane-electrode assembly; and first and second separators holding the membrane-electrode assembly therebetween. The first separator has plural first straight or wavy groove channels that are arranged in parallel to each other in a first in-plane direction. A cross section along the first in-plane direction of each of the plural first groove channels has a first uneven shape. The first uneven shape has a first pitch P1 along the first in-plane direction. The second separator has plural second wavy groove channels that are aligned along the first in-plane direction. A second uneven shape of the plural second groove channels has a second pitch P2 along the first in-plane direction. The first pitch P1 and the second pitch P2 differ from each other, and neither a value of P1/P2 nor a value of P2/P1 is an integer. ## Claims ### Claim 1 A single cell of a fuel cell for constituting a stack, the single cell comprising: a membrane-electrode assembly; and a first separator and a second separator holding the membrane-electrode assembly therebetween, wherein the first separator has plural first groove channels that are straight or wavy and that are arranged in parallel to each other in a first in-plane direction, a cross section along the first in-plane direction of each of the plural first groove channels has a first uneven shape, the first uneven shape has a first pitch P1 along the first in-plane direction, the second separator has plural second groove channels that are wavy and that are arranged along the first in-plane direction, a cross section along the first in-plane direction of each of the plural second groove channels has a second uneven shape, the second uneven shape has a second pitch P2 along the first in-plane direction, the first pitch P1 and the second pitch P2 differ from each other and neither a value of P1/P2 nor a value of P2/P1 is an integer, and a pattern of the plural first groove channels differs from a pattern of the plural second groove channels such that the first separator and second separator are asymmetrical with respect to the membrane-electrode assembly. ### Claim 2 (depends on 1) The single cell of the fuel cell according to claim 1, wherein the plural first groove channels and the plural second groove channels are formed in a region opposing the membrane-electrode assembly. ### Claim 3 (depends on 1) The single cell of the fuel cell according to claim 1, wherein the first pitch P1 and the second pitch P2 satisfy 1