Abstract: An object of the present invention is to provide a polymer electrolyte fuel cell capable of producing a high output without causing a drop or instability of the cell voltage of the fuel cell and a generating system having the polymer electrolyte fuel cell mounted thereon.

Abstract: A separator for fuel cell comprising an electrolyte with ionic conductivity, a pair of electrodes with the electrolyte sandwiched therebetween, and a separator 10 for individually supplying a fuel gas and an oxidizing agent gas to the pair of the electrodes, respectively, wherein the separator 10 is provided with a multilayered metal sheet with at least the outermost layer thereof, and a corrosion-resistant film covering the whole surface of the metal sheet in order to form a metal separator, and the metal separator is further provided with a reacting gas sealing unit 21, a reacting gas manifold junction unit 22, and a reacting gas rectification unit 23, formed of an elastic body.

Abstract: A fuel cell system having a fuel cell 1, a load 8 connected to the output line of the fuel cell 1 and a control apparatus 20 for controlling an amount of current flowing to the load 8, wherein a stopping state for stopping the fuel cell system includes a first stage stopping state for stopping while remaining hydrogen in the hydrogen line and a second stage stopping state for stopping substituting the hydrogen line with air, and transfers to the second stage stopping state by way of the first stage stopping state.

Abstract: A polymer electrolyte fuel cell comprises a fuel cell stack and a humidifier. The fuel cell stack includes plural cells in which each cell has a pair of electrodes and a proton-conductive electrolyte membrane arranged between the pair of electrodes, wherein an oxidant gas or a fuel gas passes through the humidifier before being fed to the fuel cell stack, and wherein a wet gas containing water or water vapor also passes through the humidifier. In the fuel cell, the humidifier includes a porous separating layer and a hydrophilic water-releasing layer, wherein the separating layer is configured to separate the wet gas from the oxidant gas or the fuel gas in the humidifier, and wherein the hydrophilic water-releasing layer is disposed in a side of the oxidant gas or the fuel gas to the separating layer in the humidifier.

Abstract: A polymer electrolyte fuel cell comprising a first separators for oxidizing gas and a second separator for fuel gas and a membrane/electrode assembly sandwiched between the separators. A first group of oxidizing gas flow passages flowing, from an entrance towards a turning point, has the longer length than a second group of oxidizing gas flow passages. The second group of flow passages, from the turning point towards an exit, are formed on the plane of the first separator. A downstream of the flow passages of the first group is located near an upper stream of the flow passages of the second. The flow passages of the first group and flow passages of the second group adjoin one another on the plane of the first separator.

Abstract: A part of cell stack portions constituting a part of a fuel cell stack is used as a voltage detection portion, the size of a frequency component belonging to a predetermined specific frequency range is extracted from a voltage signal detected and the existence/absence of abnormality of a fuel cell system is diagnosed on the basis of the frequency component extracted.

Abstract: The fuel cell system comprises a fuel cell having an anode supplied with fuel gas and a cathode supplied with oxidizing agent gas, a water penetration membrane-type moistening device for collecting moisture contained in cathode off gas discharged from a cathode exit of the fuel cell and moistening oxidizing agent gas, and a moisture regulating means for regulating moisture contained in cathode off gas between the cathode exit of the fuel cell and the water penetration membrane-type moistening device, wherein when operating the fuel cell at more than a predetermined rated load of the fuel cell, moisture contained in cathode off gas is reduced by the moisture regulating means.

Abstract: A fuel cell module of the present invention includes a fuel cell stack and a power converter incorporated respectively in the casing. The power converter has a printed circuit board and a switching semiconductor. The printed circuit board is arranged between the switching semiconductor and the fuel cell stack, thereby cutting off the radiation of heat from the fuel cell stack to the switching semiconductor, and reducing the conduction loss of the switching semiconductor. Further, a high frequency transformer equipped with a Ferrite core is arranged on the side of the fuel cell stack of the printed circuit board, thereby reducing the iron loss in the high frequency transformer.

Abstract: A polymer electrolyte fuel cell having a separator for separating a fuel gas from an oxidant gas and a solid polymer electrolyte membrane, wherein the separator has a gas passage formed by a channel for flowing a fuel gas or an oxidant gas through thereof, and the shape of the cross section of the channel is restricted by a channel width A and a channel depth B, where B is greater than or equal to A/2 but smaller than or equal to A.

Abstract: A fuel cell system comprises an electrolyte membrane having an ion conductivity, a pair of electrodes contacting with the electrolyte membrane, and a separator having at least a passage for an oxidant gas, and a device for setting a cell voltage to substantially zero at the time of an stop operation of the fuel cell by setting a flow rate of the oxidant gas in the passage to substantially zero in a state of taking out a current from the cell.

Abstract: The object of this invention is to provide an electrode for a polymer electrolyte fuel cell, a separator therefor, a polymer electrolyte fuel cell and a generating system, which electrode is simplified in structure, have high handling property, can be transferred precisely to a predetermined position, and enables automation of a production process. This invention provides an electrode for a polymer electrolyte fuel cell which electrode contains: a solid polymer electrolyte membrane; electrode layers formed respectively on both faces of the electrolyte membrane; two reinforcing members which cover respective outer surfaces of the electrode layers; and a sealing member which covers, extending from respective end faces to respective end parts of the reinforcing members, whole peripheries of the two reinforcing members, wherein the electrolyte membrane, the electrode layers and the reinforcing members are integrally formed by the sealing member.

Abstract: A solid-polymer electrolyte fuel cell comprising power generating units each being constituted by laminating an electrolyte membrane sandwiched between a pair of electrodes, and a pair of gas diffusion layers disposed on the electrodes, wherein laminated portions are formed in the peripheries of the power generating units by laminating a separator, a gasket, the power generating unit, a gasket, and a separator in this order. Covering parts each has a gas flow channel forming groove, a plurality of gas flow channel forming leg portions extend in the direction of the depth of the grooves, and supporting portions for uniting the gas flow channel forming leg portions, the covering parts being inserted into the grooves.

Abstract: While a fuel cell is refreshed without interrupting a power generation by the fuel cell, a polymer electrolyte membrane fuel cell power generation system capable of maintaining performance of the fuel cell under stable condition for a long time period is provided. In the polymer electrolyte membrane fuel cell power generation system, when a load detected by a power detecting unit of a power converting unit is not equal to a time rated load, a control unit drives a fuel cell unit for a predetermined time period in a power generation mode corresponding to the rated load.

Abstract: A fuel cell system for power generation comprising a solid polymer type fuel cell having a solid polymer electrolyte membrane for separating an anode gas and a cathode gas, a resistor, an inverter, a switch for switching the inverter and the resister with respect to the fuel cell, the switch and the inverter, a supply conduit and discharge conduit for the anode gas and the cathode gas, and a supply vale and a discharge valve. When a molar ratio of the hydrogen contained in the anode gas to oxygen contained in the cathode gas becomes 2/1 or less at the time of the stop of the fuel cell, the supply valve for air is closed.

Abstract: The fuel cell assembly disclosed includes at least one unit fuel cell comprising a separator having flow channels for oxidizing gas, a cathode to which the oxidizing gas is fed, a membrane electrolyte of proton conductivity, an anode to which fuel gas is fed, and a separator having flow channels for the fuel gas, the above members being arranged in order. The fuel cell assembly further comprises a humidifier having a porous member to humidify at least the oxidizing gas to be fed to the anode. The porous member of the humidifier is so disposed as to face at least the flow channels for the oxidizing gas so that water is supplied to the flow channels from part of the surface of the porous member opposite to the water supplying face and/or from the outer periphery of the porous member.

Abstract: The present invention relates to a liquid preparation containing crude drug extracts in an amount of 5 to 50 w/v % in terms of a dry extract weight based on the whole amount of the liquid preparation, characterized by containing saccharides in an amount of 5 to 40 w/v % based on the whole amount of the liquid preparation and adjusting a pH to 4.5 to 5.5.

Abstract: The object of this invention is to provide an electrode for a polymer electrolyte fuel cell, a separator therefor, a polymer electrolyte fuel cell and a generating system, which electrode is simplified in structure, have high handling property, can be transferred precisely to a predetermined position, and enables automation of a production process.

Abstract: The object of this invention is to provide an electrode for a polymer electrolyte fuel cell, a separator therefor, a polymer electrolyte fuel cell and a generating system, which electrode is simplified in structure, have high handling property, can be transferred precisely to a predetermined position, and enables automation of a production process.

Abstract: A system for returning a rate back to a content provider, includes (a) at least one user terminal receiving and transmitting packets, (b) a plurality of content providers each of which provides contents to an internet, and (c) a packet communication network connected to both the user terminal and the internet through radio signals, the packet communication network allowing packets to pass therethrough between the user terminal and the content providers, and charging the user terminal making access to the content providers, for packet rates. When the user terminal receives packets provided from a content provider to which at least a part of the packet rates is to be returned back, the part of the packet rates is returned back to the content provider.

Abstract: The object of this invention is to provide an electrode for a polymer electrolyte fuel cell, a separator therefor, a polymer electrolyte fuel cell and a generating system, which electrode is simplified in structure, have high handling property, can be transferred precisely to a predetermined position, and enables automation of a production process.