Patent application number | Description | Published |
20080300729 | Mobile Body - A disclosed mobile body includes an energy generator configured to generate energy from a supplied fuel gas; a gas leakage detecting unit configured to detect leakage of the fuel gas out of the energy generator; a control unit configured to control power output of the energy generator; an information obtaining unit configured to obtain environmental information on an environment around the mobile body from a predetermined information source; and a power-control-manner determining unit configured to determine a power-control manner, in which the control unit controls the power output of the energy generator, based on the environmental information on the environment around the mobile body when leakage of the fuel gas is detected by the gas leakage detecting unit. | 12-04-2008 |
20100035106 | FUEL CELL SYSTEM - A shutoff value provided on the entrance side and exit side of a fuel cell system has a diaphragm. A valve closing-side pressure chamber is provided on the upper face side of the diaphragm, and a valve opening-side pressure chamber is provided on the lower face side of the diaphragm. With the valve closing-side pressure chamber of the shutoff valve pressurized, the pressure in the chamber is maintained by ViS, Vic, and ViO in an electrically non-conducted state. Also, the pressure in the valve opening-side pressure chamber of the shutoff valve is maintained released. By this, force acting in the direction of closing a valving element acts on it through the diaphragm, maintaining the shutoff valve closed. | 02-11-2010 |
20100068580 | FUEL CELL SYSTEM - Fluid control valves, such as a humidifying module bypass valve, an inlet shutoff valve, an outlet shutoff valve are opened and closed by the pressure of air flowing in a fluid flow path. The pressure of air flowing in the fluid flow path is regulated, based on a drive demand pressure emitted to drive the flow control valves, by the flow rate of air discharged from an air compressor, the degree of opening of a fuel cell bypass valve, the degree of opening of an air pressure regulation valve, etc. The drive demand pressure for driving a shutoff valve is set such that, for example, the greater the absolute value of the negative pressure inside the fuel cell stack, the higher the drive demand pressure, and the air pressure is controlled to be the drive demand pressure. Since the pressure of air flowing in the fluid flow path is regulated based on a drive demand pressure of the fluid control valves, the response of drive and reliability of the fluid control valves are better than those in the case where, for example, the pressure is regulated based on a request from a fuel cell. | 03-18-2010 |
20100221630 | FUEL CELL SYSTEM - In a fuel cell system, it is possible to suppress fixation of a fluid circulating device arranged in a fluid passage connected to a fuel cell main body. The fuel cell system is provided with a fuel cell stack, a system main body having respective elements for supplying a fuel gas and respective elements for supplying an oxidizing gas, and a control device. The control device includes a fluid circulating device drive processing unit having a function to forcibly drive the fluid circulating device after determining, based on a judgment related to one or more of a non-use time, an operation state of the system main body, a membrane impedance state of a fuel cell, a temperature of the fuel cell stack, and a background noise, whether or not forced driving to suppress sticking of the fluid circulating device is preferable at that time. | 09-02-2010 |
20100239934 | FUEL CELL SYSTEM AND METHOD OF CONTROLLING ROTATION SPEED OF COMPRESSOR - Even when the atmospheric pressure is lowered, a sufficient amount of oxidant gas is supplied to a fuel cell without causing any failure in a compressor. A control unit judges whether or not both the following conditions are satisfied: the accelerator opening degree detected by an accelerator opening degree sensor is equal to or larger than a predetermined opening degree; and the state where the atmospheric pressure detected by a pressure sensor is equal to or lower than a predetermined pressure value has been maintained for a predetermined time period or longer. If the judgment result is positive, the control unit changes the maximum rotation speed permitted in the compressor from a normal maximum rotation speed to an increased maximum rotation speed. The control unit then judges whether or not a predetermined time period has elapsed from when the maximum rotation speed was changed to the increased maximum rotation speed, and also judges whether or not the state where a discharge temperature of the compressor detected by the temperature sensor is equal to or higher than a predetermined temperature has been maintained for a predetermined time or longer. If the result of at least one of these judgments is positive, the control unit returns the maximum rotation speed to the normal maximum rotation speed. | 09-23-2010 |
20100248060 | FUEL CELL SYSTEM AND HYDROGEN LEAK JUDGMENT METHOD IN THE SYSTEM - While the operation of a fuel cell is stopped, a pressure decrease caused by a current sweep is suppressed from being misjudged as being the occurrence of a hydrogen leak or a cross leak, and the judgment accuracy of the hydrogen leak, etc. is improved. In order to realize this feature, during an intermittent operation, in which, when a load on the fuel cell system is low, electrical power is supplied from a power storage unit in the fuel cell system to a power-consuming apparatus and power generation of a fuel cell is temporarily stopped, in the situation where a current sweep for suppressing a degradation of the fuel cell is performed, a hydrogen pressure in an anode of the fuel cell is corrected based on hydrogen consumed by the current sweep, and a hydrogen leak judgment based on a pressure decrease or a cross leak judgment based on a pressure decrease is performed on the basis of the corrected hydrogen pressure. For example, a pressure decrease speed of the hydrogen pressure in the anode which decreases due to power generation in the current sweep is integrated to obtain the amount of hydrogen pressure decrease caused by the power generation; and the amount of hydrogen pressure decrease can be reflected. | 09-30-2010 |
20100261078 | FUEL CELL SYSTEM - A fuel cell system includes: an oxidizing gas supply shut valve; an oxidizing gas exhaust shut valve; a cathode pressure measuring unit as a pressure detection unit for detecting a cathode pressure value which is a pressure of a channel between the oxidizing gas supply shut valve and the oxidizing gas exhaust shut valve; a stop processing unit which closes the oxidizing gas supply shut valve and the oxidizing gas exhaust shut valve when operation of the fuel cell stack is stopped; and a judgment unit which judges whether the operations of the oxidizing gas supply shut valve and the oxidizing gas exhaust shut valve have failed according to the cathode pressure value upon stop when the operation of the fuel cell stack is stopped and the cathode pressure value upon start when the operation of the fuel cell stack is started after the stop. | 10-14-2010 |
20110123885 | Fuel cell system and gas control method - A fuel cell system including a fuel cell that generates electricity through an electrochemical reaction between a fuel gas and an oxidizing gas is provided with a gas supply unit that supplies each of the fuel gas and the oxidizing gas to an anode and a cathode of the fuel cell, respectively by quantity corresponding to a load, a gas permeation quantity estimation unit that estimates a gas permeation quantity of at least one of the fuel gas and the oxidizing gas between the anode and the cathode after the power generation performed by the fuel cell is stopped, and a correction unit that corrects a supply quantity of at least one of the fuel gas and the oxidizing gas each corresponding to the load in accordance with the estimated gas permeation quantity, which is to be supplied by the gas supply unit upon a subsequent start of power generation. | 05-26-2011 |
Patent application number | Description | Published |
20080261092 | Fuel Cell System - At the startup of a fuel cell system comprising a fuel cell that generates power upon receiving a supply of a reactive gas and discharges a reactive offgas, a gas passage in which the reactive gas or the reactive offgas flows, a valve device that is installed on the gas passage, and a control device that controls the opening of the valve device, the downstream pressure of the valve device is first acquired and, when the downstream pressure is equal to or less than a predetermined pressurization termination pressure, the valve device is duty-controlled by means of a predetermined duty ratio. As a result, the generation of strange noise and the generation of mechanical component stress that arise from sudden pressurization are suppressed. | 10-23-2008 |
20090136804 | Fuel Cell System and Its Temperature Adjusting Method - A fuel cell system having a fuel cell, coolant circulating means which circulates cooling water into the fuel cell, temperature sensors which detect a cooling water outlet temperature and a cooling water inlet temperature, and temperature adjusting means which adjusts a temperature of the fuel cell by controlling a flow rate of the coolant on the basis of the cooling water outlet temperature, is characterized by including abnormality determining means which determines whether or not abnormality occurs in the temperature sensor, and coolant temperature estimating means which, when the abnormality determining means determines that abnormality occurs in the temperature sensor, estimates the cooling water outlet temperature on the basis of physical information relating to operating states of the fuel cell. | 05-28-2009 |
Patent application number | Description | Published |
20160116539 | Device for Monitoring Electricity Generation and Method for Monitoring Electricity Generation - A device for monitoring electricity generation comprising: an acquirer that acquires a total value of cell voltage from multiple cells including fuel cells; an increaser that increases the anode gas now rate to the multiple cells when the total value shows a possibility of negative voltage occurring in some of the multiple cells; and a judger that judges if negative voltage occurred in some of the multiple cells based on the total value following the increase of the anode gas flow rate. | 04-28-2016 |
20160126574 | FUEL CELL SYSTEM AND MAXIMUM POWER CALCULATION METHOD - The fuel cell system includes: a fuel cell | 05-05-2016 |
20160129808 | FUEL CELL SYSTEM - A flow control valve | 05-12-2016 |
20160133969 | FUEL CELL SYSTEM AND POWER GENERATION MONITORING METHOD - A fuel cell system comprising: an acquirer that acquires a total value of cell voltages of two or more cells included in a fuel cell; and a determiner that determines, when the total value is a first voltage value, abnormal power generation in which power generation by at least a part of the two or more cells is abnormal, that determines, when the total value is a second voltage value higher than the first voltage value, normal power generation in which power generation by the two or more cells is normal and that determines, when the total value is a third voltage value higher than the first voltage value but lower than the second voltage value, the normal power generation if a cathode gas is deficient or the abnormal power generation if the cathode gas is not deficient. | 05-12-2016 |
20160133973 | FUEL CELL SYSTEM AND OPERATING METHOD OF FUEL CELL SYSTEM - The present invention provides a system for a fuel cell vehicle, capable of preventing an unnecessary error in calculating high potential avoidance power to calculate power for high potential avoidance with high accuracy. A fuel cell system | 05-12-2016 |
20160141688 | Fuel Cell System and Dryness Degree Acquisition Method - A fuel cell system, comprising: a measurer that measures an impedance of the fuel cell; a controller that controls an operation state of the fuel cell; and an acquirer that acquires a dryness degree of the fuel cell from the measured impedance when the operation state is a first operation state, and acquires the dryness degree of the fuel cell as a wet state when the operation state is a second operation state in which a water balance is more than the first operation state. | 05-19-2016 |