FUEL CELL

• Main Authors: KATO HIDEAKI, SAITO TAKEAKI
• Format: Patent
• Language: English; Japanese
• Published: 26.03.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a fuel cell capable of suppressing accumulation of water at a position facing an enlarged portion below a rib of a membrane electrode assembly.SOLUTION: A fuel cell 1 includes: a MEGA 3; an anode-side separator 4 and a cathode-side separator 5 for sandwiching the MEGA 3; and an oxidizing gas flow path 13, provided between the MEGA 3 and the cathode-side separator 5, formed in a meandering shape including bent portions extending continuously in plan view. The cathode-side separator 5 is provided at an edge of the oxidizing gas flow path 13 parallel to a gas flow direction X and has an enlarged portion 53 below a rib protruding toward the MEGA 3 side. At an edge parallel to the gas flow direction X, a high pressure loss flow path 14 having a larger pressure loss than the oxidizing gas flow path 13 is provided outside the enlarged portion 53 below the rib.SELECTED DRAWING: Figure 2 【課題】膜電極接合体のリブ下拡大部に対向する位置に水が溜まることを抑制できる燃料電池を提供する。【解決手段】燃料電池１は、ＭＥＧＡ３と、ＭＥＧＡ３を挟持するアノード側セパレータ４及びカソード側セパレータ５と、ＭＥＧＡ３とカソード側セパレータ５との間に設けられ、平面視で連続して延在する屈曲部からなる蛇行状に形成される酸化剤ガス流路１３と、を備える。カソード側セパレータ５は、酸化剤ガス流路１３のガス流れ方向Ｘと平行な縁部に設けられるとともに、ＭＥＧＡ３側に突出するリブ下拡大部５３を有する。ガス流れ方向Ｘと平行な縁部において、リブ下拡大部５３の外側には、酸化剤ガス流路１３よりも圧損の大きい高圧損流路１４が設けられている。【選択図】図２