Abstract:
PROBLEM TO BE SOLVED: To improve a power generation performance of a fuel cell during operation at a high temperature.SOLUTION: The fuel cell includes: a membrane-electrode assembly 12: an anode-side gas diffusion layer 16 placed on an anode side of the membrane-electrode assembly 12; a cathode-side gas diffusion layer 17 placed on a cathode side of the membrane-electrode assembly 12; and a cathode-side separator 21 provided so as to oppose the cathode-side gas diffusion layer 17 and forming an oxidation gas flow path where an oxidation gas flows, in a laminating manner. The anode-side gas diffusion layer 16 has: a first gas diffusion layer part 16a corresponding to an inlet vicinity in a lamination direction; and a second gas diffusion layer part 16b located on a downstream side in the flowing direction of the oxidation gas than the first gas diffusion layer part 16a, and thermal resistance in a thickness direction of the first gas diffusion layer part 16a is smaller than thermal resistance in a thickness direction of the second gas diffusion layer part 16b.
Abstract:
PROBLEM TO BE SOLVED: To suppress dry-up in a solid polymer electrolyte fuel cell in which fuel gas and oxidant gas are formed in counterflow configurations.SOLUTION: The fuel cell 100 includes a cathode side catalyst layer 14 being formed such that the weight of a catalyst per unit area of a first region (region Ra; high catalyst density catalyst layer 14a) on an upstream side in a flow direction of the oxide gas is to be larger than that of the catalyst per unit area in a second region (region Rb; low catalyst density catalyst layer 14b) other than the first region.
Abstract:
PROBLEM TO BE SOLVED: To manufacture a porous body layer for a fuel battery which can satisfy both an appropriate drainage and water retention for the fuel battery.SOLUTION: This manufacturing method includes: a first plating step where a part of a resin base material 52 is immersed in a plating bath 62 for a first prescribed time to form a porous body 48; and a second plating step where the other part of the resin base material 52 is immersed in the plating bath for a second prescribed time which is longer than the first prescribed time to form a porous body 50. The porous body 50 has smaller average pore diameter than the porous body 48.
Abstract:
PROBLEM TO BE SOLVED: To sufficiently suppress the degradation of power generation performance of a fuel cell due to dryness.SOLUTION: A fuel cell comprises: a power generator layer including an electrolyte membrane and a catalyst layer; an anode gas channel layer having an anode gas channel; and a cathode gas channel layer having a cathode gas channel. A cathode outlet vicinity area, which is the most downstream portion of a cathode effective channel portion where the cathode gas supply to the power generator layer is carried out, and an anode inlet vicinity area, which is the most upstream portion of an anode effective channel portion where the anode gas supply to the power generator layer is carried out, face each other across the power generator layer. A cathode inlet vicinity area, which is the most upstream portion of the cathode effective channel portion, and an anode intermediate portion, which is downstream of the anode inlet vicinity area of the anode effective channel portion and upstream of an anode outlet vicinity area, i.e., the most downstream portion of the anode effective channel portion, face each other across the power generator layer.
Abstract:
PROBLEM TO BE SOLVED: To provide a polymer electrolyte fuel cell stack capable of restraining its drying-up. SOLUTION: A cathode-side separator 42 for forming the polymer electrolyte fuel cell stack includes: a first gas passage (a first groove section 422cd1) for passing a cathode gas in a first direction along the surface of one membrane-electrode assembly; and a second gas passage (a second groove section 422cd2) for passing the cathode gas in a second direction opposite to the first direction along the surface of one membrane-electrode assembly. The first gas passage (the first groove section 422cd1) and the second gas passage (the second groove section 422cd2) are alternately arranged in a direction perpendicular to the first and second directions. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To inhibit emission of NOx and smoke, suitably purify exhaust gas after passing through a catalyst, and suitably reduce pressure loss in an EGR passage. SOLUTION: An exhaust emission control device includes a plurality of intake air supercharger disposed in an intake system of an internal combustion engine 200 including a motor driven supercharger 217 composed in such a manner that the same is driven by a motor 400 and can supercharge intake air mutually in series, and an EGR device 300 which is connected to an exhaust system of the internal combustion engine and can supply part of exhaust gas from the exhaust system to an intake system as EGR gas. The EGR device 300 includes an EGR supercharger 307, a first passage 311 provided with a first open close valve 308, and a second passage 312 provided with a second open close valve 309. A supply route of EGR gas is controlled to a second route including the second passage but not including the first passage by drive control of the first and the second open close valves when the EGR supercharger is not operated. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To shorten a time before restarting of a fuel cell stack in which abnormality takes place. SOLUTION: The fuel cell power generation system is provided with a reaction gas supply passage where a plurality of fuel cell stacks 10A-10C are connected in parallel, a cooling device 40 equipped with a first circulating passage 43X circulating a coolant between a first and a second radiators 41, 42 connected in parallel and a plurality of fuel cell stacks and connected with each of the fuel cell stacks in parallel with the passage, and cell monitors 61-63 arranged with each of the fuel cell stacks. When abnormality in the fuel cell stack is detected by the cell monitor, a passage pattern of the cooling device 40 is so formed that the first circulating passage 43X including the fuel cell stacks other that the abnormality-detected fuel cell stack and the first radiator 41 and the second circulating passage 43Z including the abnormality-found fuel cell and the second radiator may be arranged separately. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a fuel cell capable of a non-humidification operation even when its temperature is set high. SOLUTION: This fuel cell is provided with: a membrane-electrode assembly; a pair of separators 102 and 103; an oxidizer gas passage 104 formed on the cathode side of the separator 102 for making an oxidizer gas to be supplied to the membrane-electrode assembly pass therethrough; and a fuel gas passage 105 formed on the anode side of the separator 103 for making a fuel gas to be supplied to the membrane-electrode assembly pass therethrough. In the fuel cell, the entrance part 100a of the oxidizer gas passage 104 and the exit part 100e of the fuel gas passage 105 are arranged adjacently to each other; the exit part 100b of the oxidizer gas passage 104 and the entrance part 100c of the fuel gas passage 105 are arranged adjacently to each other; and the opening area of the entrance part 100a of the oxidizer gas passage 104 is set larger than that of the exit part 100b of the oxidizer gas passage 104. The opening area of the entrance part 100c of the fuel gas passage 105 is set smaller than that of the exit part 100d of the fuel gas passage 105. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To quickly start power generation startup for a fuel cell stack by preventing freezing of product water and a cooling medium inside under a low-temperature environment below freezing point. SOLUTION: An air guide-in channel 6 branched from an air supply channel 21 reaching an air compressor 23 is connected to a cooling water supply channel 41 of a cooling water circulation system 4 for cooling a fuel cell stack 1 through a flow channel switching valve 63. To a cooling water exhaust channel 42 of the cooling water circulation channel 4, a cooling water recovery channel reaching a cooling water tank 71 is connected through a flow channel switching valve 72. At stoppage of operation, at the same time as a scavenging treatment, air pressurized by the air compressor 23 is guided in from the air guide-in channel 6 into a cooling water flow channel 45 in the fuel cell stack 1 to recover cooling water to the cooling water tank 71. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To correctly estimate only the cross-leaked hydrogen gas in a fuel cell device having a fuel cell generating electric power by reacting hydrogen gas in an electrode on an electrolyte membrane. SOLUTION: The fuel cell device 1 is equipped with a fuel cell 2 having an electrolyte membrane 20 on both sides of which electrodes 21, 22 are arranged, and generating electric power by electrochemical reaction of hydrogen gas supplied to the electrode 21 on one side and oxidative gas supplied to the electrode 22 on the other side. The fuel cell device 1 is equipped with a current detector 4 detecting current of electric power generated based on the concentration difference of hydrogen generated between the electrodes 21, 22 through the electrolyte membrane 20, by supplying hydrogen gas to only the electrode 21 on one side; a hydrogen detector 3 detecting hydrogen in offgas exhausted from the electrode 22 on the other side; and a penetrated hydrogen amount estimation means 5 (6) estimating the amount of hydrogen penetrated through the electrolyte membrane 20 and leaked, based on a detected value of the current detector 4 and a detected value of the hydrogen detector 3. COPYRIGHT: (C)2008,JPO&INPIT