Patent application number | Description | Published |
20090141838 | APPARATUS AND METHOD FOR AUTOMATICALLY CHANGING BROADCAST CHANNEL FOR MOBILE COMMUNICATION TERMINAL ADAPTED TO RECEIVE DIGITAL MULTIMEDIA BROADCAST - Disclosed is an apparatus and a method for automatically changing the broadcast channel for a mobile communication terminal adapted to receive digital multimedia broadcasts. The apparatus includes a memory unit for storing an adjacent area database and an area-wise broadcast channel database; a search unit for searching for broadcast channels and receiving broadcasts; and a control unit for determining the received field strength of at least one adjacent area frequency based on the adjacent area database during digital multimedia broadcast playback, and when a predetermined threshold is exceeded, determining that a movement into a corresponding adjacent area is occurring, the control unit controlling the search unit to search through broadcast channels of the adjacent area in the area-wise broadcast channel database to find a broadcast channel identical to a broadcast channel used for playback before the movement into the adjacent area. | 06-04-2009 |
20100045668 | Apparatus and Method for 3D Packet Scale Down with Proxy Server in Mobile Environment - A mobile network capable of 3-Dimensional (3D) packet scale down includes a server, mobile station and proxy server. The proxy server includes an apparatus and method for 3-Dimensional (3D) packet scale down. The method includes receiving a 3D packet from a main server, generating a set of unit figures constituting a 3D image using a parameter of the received 3D packet, and increasing a size of a partial unit figure in the generated set of the unit figures, and generating a set of the same size as the generated set of the unit figures, by figures of less number than the generated set of the unit figures. | 02-25-2010 |
20120072926 | METHOD AND APPARATUS FOR CONSTRUCTING A WIDGET ENVIRONMENT - A method and apparatus construct a widget environment. The method converts an application programming interface (API) into an API call in a Web service format in response to identifying that the API that is not executable in a current device is called. The method transmits the API call in the Web service format to a remote device in which the API is executable. The method receives a result obtained from the API call being executed in the Web service format in the remote device. | 03-22-2012 |
20130135512 | MOBILE ELECTRONIC DEVICE AND DOCKING STATION THEREOF - A mobile electronic device including: a body including an accommodation space; and an aroma capsule that is accommodated in the accommodation space, is removable from the accommodation space, and includes an aroma to diffuse a fragrance. | 05-30-2013 |
20130141640 | DIGITAL PHOTOGRAPHING SYSTEM AND METHOD OF OPERATING DIGITAL PHOTOGRAPHING SYSTEM - A digital photographing system includes a smart mount that includes lenses, a shutter, an image sensor, and an image processor, combined with a camera body or a mobile terminal device. A method of operating the digital photographing system is provided. The digital photographing system includes a lens; a smart mount that captures and processes an image of an object input via the lens; and a body that displays, modifies, stores, or deletes the image captured and processed by the smart mount. | 06-06-2013 |
20130148002 | CAMERA WITH MULTI-FUNCTION DISPLAY - A camera is provided that includes a first panel including a plurality of lens units to capture an image, the lens units being disposed at one side of the first panel; a second panel that is rotatably connected to one edge of the first panel so that the first panel and the second panel rotate relative to each other between a first position contacting the one side of the first panel and a second position contacting the other side of the second panel; and an electronic mirror display unit to display an image if a signal is applied to the electronic mirror display unit and to reflect light if a signal is not applied to the electronic mirror display unit, the electronic mirror display unit being disposed at one side of the second panel corresponding to the one side of the first panel at the first position. | 06-13-2013 |
Patent application number | Description | Published |
20150113449 | SYSTEM AND METHOD FOR PROVIDING USER INTERFACE - If a content creator that creates content and a service provider that provides the content are different, the content should be reconfigured and provided. In order to provide an interface suitable for a user environment, only a limited user environment should be considered. Thus, flexibility is low when an adaptive user interface is provided. It is possible to provide a user interface, independently of the relevant designer, by redefining content, a usage environment, and a relation between a page and a service provider and dynamically providing a user interface suitable for the user environment. | 04-23-2015 |
20150180735 | APPARATUS AND METHOD FOR PROVIDING COLLABORATIVE SERVICE BASED ON VIRTUAL RESOURCES - Provided is a method for providing a collaborative service based on virtual resources including generating virtual resources virtualized according to unique services or characteristics of devices connected through an assist gateway in a specific space and collecting virtual resource information including internal states of the virtual resources and services provided by the virtual resources, configuring a collaborative service with respect to the virtual resources using the virtual resource information, and generating a control command with respect to at least one or more virtual resources defined in a requested collaborative service. | 06-25-2015 |
20150332337 | TECHNOLOGY OF ASSISTING CONTEXT BASED SERVICE - A method of providing a context based service is performed by a user terminal. The method includes: generating a user profile about at least one entity; providing user profile characteristic information obtained or inferred from the user terminal associated with the at least one entity; and controlling to provide a user description generated based on the user profile and the user profile characteristic information to a recommendation engine for a required service if a recommendation of a context based service is required to the at least one entity, the recommendation engine performing a service recommendation according to a situation of the at least one entity. | 11-19-2015 |
20160098482 | METHOD OF ORGANIZING USER-CUSTOMIZABLE CONTENT ADAPTATION OBJECT, USER-CUSTOMIZABLE CONTENT ADAPTATION OBJECT ORGANIZING SERVER PERFORMING THE SAME AND STORAGE MEDIUM STORING THE SAME - A method of organizing a user-customizable content adaptation object being performed on a user-customizable content adaptation object organizing server, the server being coupled to a user terminal, the method includes: (a) classifying at least one resource based on a context category; (b) selecting at least one classified content adaptation object based on a context to associate the at least one classified content adaptation object with an object collector, the at least one classified content adaptation object respectively corresponding to a computer-executable object, and being capable of receiving a remote response by the user terminal or being applied to the user terminal; (c) generating a collector layout page including the at least one content adaptation object in the object collector; and (d) providing the generated collector layout page to the user terminal. | 04-07-2016 |
20160112268 | TERMINAL FOR INTERNET OF THINGS AND OPERATION METHOD OF THE SAME - An example Internet of Things (IoT) terminal includes communication circuitry configured to communicate with an IoT apparatus and a data processor configured to transmit, to the IoT apparatus, a request for establishing a connection to the IoT apparatus, and to recognize a physical signal as a response signal output from the IoT apparatus in response to the request for establishing a connection. | 04-21-2016 |
20160112433 | TERMINAL FOR INTERNET OF THINGS AND OPERATION METHOD OF THE SAME - An example terminal includes a communication circuitry configured to communicate with a server; and a data processor configured to request the server to include a second user in a relationship group of a first user and to extend, to the relationship group, a range of authorization for an Internet of Things (IoT) apparatus registered as an apparatus of the first user. | 04-21-2016 |
20160112434 | TERMINAL FOR INTERNET OF THINGS AND OPERATION METHOD OF THE SAME - An example terminal includes a communication circuitry configured to communicate with a server; and a data processor configured to request the server to include a second user in a relationship group of a first user and to extend, to the relationship group, a range of authorization for an Internet of Things (IoT) apparatus registered as an apparatus of the first user. | 04-21-2016 |
Patent application number | Description | Published |
20150060825 | WHITE ORGANIC LIGHT EMITTING DIODE AND DISPLAY DEVICE USING THE SAME - A white organic light emitting diode (OLED) includes a first electrode and a second electrode facing each other; a first charge generation layer and a second charge generation layer between the first and second electrodes; a first light emitting unit including a first emitting material layer emitting a first color, wherein the first light emitting unit is located between the first electrode and the first charge generation layer; a second light emitting unit including a second emitting material layer emitting a second color, wherein the second light emitting unit is located between the first charge generation layer and the second charge generation layer; and a third light emitting unit including a third emitting material layer emitting the second color, wherein the third light emitting unit is located between the second charge generation layer and the second electrode. | 03-05-2015 |
20150090984 | ORGANIC LIGHT EMITTING DISPLAY DEVICE - Disclosed is an organic light emitting display (OLED) device that may include first and second electrodes facing each other on a substrate, at least two light emitting units between the first and second electrodes, and a charge generation layer between the at least two light emitting units, the charge generation layer including an N-type charge generation layer and a P-type charge generation layer, wherein the N-type charge generation layer includes at least two hosts and a dopant, and wherein the at least two hosts have different lowest unoccupied molecular orbital (LUMO) energy levels. | 04-02-2015 |
20150187850 | ORGANIC LIGHT EMITTING DIODE AND ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE INCLUDING THE SAME - Discussed is an organic emitting diode including an anode; a cathode facing the anode; a first emitting material layer between the anode and the cathode and including a first host material, the first host material having a first triplet energy; and a hole transporting layer between the first emitting material layer and the anode, a material of the hole transporting layer having a second triplet energy being larger than the first triplet energy. | 07-02-2015 |
20150188066 | WHITE ORGANIC LIGHT EMITTING DEVICE - Discussed is a white organic light emitting device including an anode and a cathode opposite to each other, a plurality of stacks disposed between the anode and the cathode, each of the stacks including a hole transport layer, a light emitting layer and an electron transport layer, and a charge generation layer disposed between different stacks, the charge generation layer including a single organic host having an electron transport property, and an n-type dopant and a p-type dopant. | 07-02-2015 |
20150188076 | WHITE ORGANIC LIGHT EMITTING DEVICE - A white organic light emitting device including an anode and a cathode opposite to each other, a plurality of stacks disposed between the anode and the cathode, each of the stacks including a hole transport layer, a light emitting layer and an electron transport layer, and an n-type charge generation layer and a p-type charge generation layer disposed between different adjacent stacks, wherein the n-type charge generation layer includes a first organic host, and the p-type charge generation layer includes a second organic host having a LUMO energy level smaller than or equal to a LUMO energy level of the first organic host, and an inorganic dopant containing 1% to 20% by volume of a metal. | 07-02-2015 |
Patent application number | Description | Published |
20090017745 | Ventilation apparatus for fuel cell vehicle - The present invention provides a ventilation apparatus for a fuel cell vehicle, which can rapidly remove high-temperature air generated in the inside of a stack case by moving the same to an air cleaner using a suction pressure of air supplied for the operation of the fuel cell vehicle, reduce the risk incurred due to hydrogen leakage by moving leaking hydrogen to the air cleaner, and maintain the temperature of a fuel cell stack constant. | 01-15-2009 |
20090214928 | Fuel cell stack of fuel cell vehicle - The present invention provides a method of assembling a fuel cell stack, in which a fixing block and a fixing pin are used to assemble the fuel cell stack instead of a bolt, thereby reducing the time and process required for assembly of the fuel cell stack, enabling an assembly process using an automated device to be realized, and facilitating mass production. | 08-27-2009 |
20100279206 | Sealing structure of fuel cell separator - The present invention provides a sealing structure of a sealing portion for maintaining the airtightness of a coolant passage in two stacked separators of a fuel cell, wherein a groove in which an adhesive is to be filled is formed on a surface of one of two separators, and dam portions are formed on both sides of the groove to prevent the adhesive applied in the groove from overflowing into a connection passage and a coolant passage. Accordingly, the adhesive overflowing from the groove when the two separators are bonded to each other by applying a pressure is collected in the dam portions to form three sealing lines, thus improving the airtightness of the sealing portion. Moreover, it is possible to solve the problem that the performance of the fuel cell stack is deteriorated when an antifreeze/coolant leaks from the coolant passage to an MEA, in which the fuel cell reaction takes place, or the leaking coolant contaminates a catalyst of the MEA. | 11-04-2010 |
20110086292 | JOINING DEVICE FOR FUEL CELL STACK AND FUEL CELL STACK PROVIDED WITH THE SAME - The present invention features a fuel cell stack that preferably includes an electricity generating assembly having a plurality of unit cells that are suitably disposed one after another; a pair of end plates pressedly disposed respectively at upper and lower ends of the electricity generating assembly; and a joining device suitably engaging the end plates by a rope, where pressure is applied to the electricity generating assembly by means of tension of the rope, and the length and tension of the rope is suitably controlled. | 04-14-2011 |
20120070760 | LOCAL HYDROPHILIC GAS DIFFUSION LAYER AND FUEL CELL STACK COMPRISING THE SAME - The present invention provides a local hydrophilic gas diffusion layer configured to enhance the water removal performance of a fuel cell For this purpose, the present invention provides a gas diffusion layer in which a region under each of a pair of lands, which receives a clamping pressure of the fuel cell stack, is subjected to local hydrophilic treatment by a simple process, thereby enhancing the water removal performance of the fuel cell stack. In particular, the local hydrophilic gas diffusion layer has a first region under each land of the separator which receives the clamping pressure; and a second region under the gas channel of the separator, wherein the first region is subjected to hydrophilic treatment. | 03-22-2012 |
20120094197 | HUMIDIFIER FOR FUEL CELL AND FUEL CELL SYSTEM USING THE SAME AS AUXILIARY HUMIDIFIER - The present invention provides a humidifier, which is used as an auxiliary humidifier of a fuel cell together with an existing gas-to-gas humidifier to improve humidification performance in a low efficiency region of the gas-to-gas humidifier, thus increasing the output of the fuel cell and providing high efficiency operation. Particularly, the humidifier comprises: an inlet assembly provided in an air exhaust pipe, through which water-supersaturated exhaust gas is discharged from a fuel cell stack, to supply water condensed from the exhaust gas to the fuel cell stack; an outlet assembly provided in an air supply pipe, through which a reactant gas to be humidified and supplied to the fuel cell stack passes, to supply the water transferred through a pumping pipe to the air supply pipe such that the reactant gas is humidified; and a pumping pipe including a porous material disposed therein and electrodes for applying a voltage to both ends of the porous material and disposed between the inlet assembly and the outlet assembly such that the water is transferred through a capillary path in the porous material with a pumping force by electroosmosis when the electrodes apply a voltage. | 04-19-2012 |
20120100410 | FUEL CELL SEPARATOR - The present invention provides a fuel cell separator, in which a vortex generating structure is formed on the surface of a channel of the separator to induce a vortex of fluid (i.e., hydrogen and air) flowing through the channel, thus facilitating the supply of reactant gases and the removal of water droplets from a gas diffusion layer (GDL). | 04-26-2012 |
20120122008 | MANIFOLD INSERT HAVING DISTRIBUTION GUIDES AND FUEL CELL STACK COMPRISING THE SAME - The present invention provides a manifold insert having a plurality of distribution guides which reduce output voltage deviation due to flow instability between unit cells and prevent local flow instability of electrodes by stably distributing the flow of fluid (such as air, hydrogen, and coolant) supplied to a fuel cell stack, thereby maintaining a stable performance of the unit cells, and a fuel cell stack comprising the same. In particular, manifold insert having distribution guides is provided, the manifold insert being configured to form a flow field from an inlet port of fluid to an outlet port connected to a fuel cell stack, the manifold insert including: a plurality of distribution guides for dividing the flow field from the inlet port to the outlet port such that the fuel cell stack is divided into a plurality of regions according to the distance from the inlet port, wherein the distribution guides have surfaces that are at least partially curved such that the flow of the fluid from the inlet port to the outlet port is changed by the curved surfaces and form a plurality of guide flow fields for guiding the fluid to the divided regions of the fuel cell stack such that the fluid is supplied to the divided regions of the fuel cell stack along the plurality of guide flow fields at different flow rates. | 05-17-2012 |
20120135327 | MONITORING THE OPERATIONAL STATE OF A FUEL CELL STACK - A technique is described herein for monitoring the operational state of a fuel cell stack by the detection of nonlinearity in such a manner that an external test signal for frequency response is generated and applied to the fuel cell stack during operation, the resulting signal output from the fuel cell stack is measured, and the harmonic content of the measured signal is analyzed, the method including: applying a multiple frequency test signal comprising at least two sinusoidal waves as the test signal for frequency response to the fuel cell stack; and analyzing the resulting current or voltage signal output from the fuel cell stack. | 05-31-2012 |
20130017468 | MANIFOLD BLOCK FOR FUEL CELL STACKAANM Kim; Duck WhanAACI SeoulAACO KRAAGP Kim; Duck Whan Seoul KRAANM Kum; Young BumAACI SeoulAACO KRAAGP Kum; Young Bum Seoul KRAANM Kim; Sae HoonAACI YonginAACO KRAAGP Kim; Sae Hoon Yongin KRAANM Yu; Jung HanAACI YonginAACO KRAAGP Yu; Jung Han Yongin KR - The present invention provides a manifold block for a fuel cell stack, coupled to a fuel cell stack module and having a gas passage and a cooling water passage. The manifold block includes an insulating member and an insulating cover. The insulating member is inserted into the cooling water passage and contacts an inner surface of the cooling water passage. The insulating member has a tube-like shape and electrically insulates the inner surface of the cooling water passage. The insulating cover is inserted into the cooling water passage and contacts an inner surface of the insulating member. The insulating cover fixes and protects the insulating member. | 01-17-2013 |
20130020205 | APPARATUS AND METHOD FOR FORMING OXIDATION LAYER ON MANIFOLD BLOCK FOR FUEL CELL STACK - Disclosed is an apparatus and method for forming an oxidation layer on a manifold block for a fuel cell stack, which forms an oxidation layer uniformly over the entire surface of a long and complicated internal flow field of a manifold block. In particular, the apparatus for forming an oxidation layer on a manifold block for a fuel cell stack includes: an electrolyte bath which contains an electrolyte required for the formation of the oxidation layer, an electrode for supplying a required electron flow for the formation of the oxidation layer from a power supply to the manifold block immersed in the electrolyte of the electrolyte bath and to the electrolyte, and an air supply for supplying oxygen to the electrolyte. Even more particularly, the electrode connected to the electrolyte is inserted into each internal flow field of the manifold block to provide an effective electron flow therein. | 01-24-2013 |
20130266891 | JOINING DEVICE FOR FUEL CELL STACK AND FUEL CELL STACK PROVIDED WITH THE SAME - The present invention features a fuel cell stack that preferably includes an electricity generating assembly having a plurality of unit cells that are suitably disposed one after another; a pair of end plates pressedly disposed respectively at upper and lower ends of the electricity generating assembly; and a joining device suitably engaging the end plates by a rope, where pressure is applied to the electricity generating assembly by means of tension of the rope, and the length and tension of the rope is suitably controlled. | 10-10-2013 |
20130295481 | MANIFOLD BLOCK FOR FUEL CELL STACK - Disclosed is a manifold block for a fuel cell, which provides excellent electrical insulation for a coolant flow channel in an internal flow channel. More specifically, a manifold block for a fuel cell stack, includes a coolant interface formed of a polymer insulating material and coolant flow channels; and a reactant gas interface formed of a metal material and including reactant gas flow channels. In particular, the reactant and coolant interfaces are mounted to a stack module and, at the same time, are integrally bonded to each other. | 11-07-2013 |
20130295482 | HYDROGEN SUPPLY SYSTEM FOR FUEL CELL WITH INTEGRATED MANIFOLD BLOCK - Disclosed is a hydrogen supply system for a fuel cell, which has an integrated manifold block in which components for hydrogen supply are integrated and modulated. In particular, a hydrogen supply line, a hydrogen discharge line, and a hydrogen recirculation line are formed in a manifold block mounted on the outside of a plurality of stack modules of a fuel cell stack. Additionally, components of the hydrogen supply system including components for supplying and discharging hydrogen and components for recirculating hydrogen are integrally mounted in predetermined positions of the hydrogen supply line, the hydrogen discharge line, and the hydrogen recirculation line to modularize the manifold block and the components of the hydrogen supply system. | 11-07-2013 |
20130302723 | LOCAL HYDROPHILIC GAS DIFFUSION LAYER AND FUEL CELL STACK COMPRISING THE SAME - The present invention provides a local hydrophilic gas diffusion layer configured to enhance the water removal performance of a fuel cell For this purpose, the present invention provides a gas diffusion layer in which a region under each of a pair of lands, which receives a clamping pressure of the fuel cell stack, is subjected to local hydrophilic treatment by a simple process, thereby enhancing the water removal performance of the fuel cell stack. In particular, the local hydrophilic gas diffusion layer has a first region under each land of the separator which receives the clamping pressure; and a second region under the gas channel of the separator, wherein the first region is subjected to hydrophilic treatment. | 11-14-2013 |
20130316560 | CELL VOLTAGE MEASURING CONNECTOR FOR FUEL CELL STACK - A connector that may be prevented from detaching from separating plates of a stack even when vibrations or an external impact of a vehicle occurs by maintaining a locking state in which locking bosses of a CPA are inserted into lock grooves of terminals of separating plates. In addition, connecting points of connecting pieces of connecting terminals are spaced apart to not contact each other with respect to a contact line. The connecting terminals are not detached from the separating plates even when the separating plates is a ultra-slim film having a thickness of about 0.1 mm or less, making it possible to increase a reliability of a product. | 11-28-2013 |
20140158281 | METHOD FOR MANUFACTURING MANIFOLD FOR FUEL CELL - A method for manufacturing a manifold for a fuel cell with a multilayer structure by injection-molding individual manifolds, each having welding projections and welding guides, and bonding the injection-molded individual manifolds by vibration welding includes arranging welding projections of an upper individual manifold and welding guides of a lower individual manifold to be engaged with each other while maintaining a uniform gap between each other to bond a plurality of individual manifolds in an up and down stacking structure, pressing the lower individual manifold upward, and applying vibration to the upper individual manifold in the left and right direction, thus bonding the upper and lower individual manifolds. Among the welding projections of the upper individual manifold, a non-horizontal welding projection whose longitudinal direction does not coincide with the vibration direction of the individual manifold has a variable height. | 06-12-2014 |
20140162157 | APPARATUS FOR DIAGNOSING FAULT OF FUEL CELL STACK - A failure diagnosis apparatus that includes an alternating current (AC) absorption unit that is connected to the fuel cell stack and switched based on an applied AC signal to enable a current from the fuel cell stack to flow. In addition, an AC signal generator is configured to generate the AC signal and supply the generated AC signal to the AC absorption unit. As the current from the fuel cell stack is absorbed by the AC absorption unit based on an alternating signal, a stack current input into a diagnosis processing unit includes an AC component, thus the diagnosis processing unit may diagnose fuel cell stack failure by analyzing a frequency of the AC component. | 06-12-2014 |
20140186746 | APPARATUS FOR INSULATING EXPOSED CHARGING PART OF FUEL CELL STACK - An apparatus for insulating a plurality of exposed live parts of a fuel cell stack, includes a plurality of protectors. Each of the plurality of protectors is made of an insulating material and configured to insulate a corresponding one of the plurality of exposed live parts to which a corresponding one of current collector terminals disposed in an end plate of the fuel cell stack and a corresponding one of connections of a busbar are connected. | 07-03-2014 |
20150188180 | FUEL CELL STACK - A fuel cell stack is provided that includes a fuel cell stack module and an enclosure. The fuel cell stack module includes end plates and coupling bars coupled to the end plates. The enclosure includes an upper enclosure covering a front surface, an upper surface, and a back surface of the fuel cell stack module, a lower enclosure covering the front surface, a lower surface, and the back surface of the fuel stack module, a left enclosure fixed to one of the end plates, and a right enclosure fixed to the other of the end plates. The upper enclosure and the lower enclosure are coupled to protruding portions of the left enclosure and the right enclosure and bent toward the surfaces of the fuel cell stack module so as to be in surface contact with the surfaces of the fuel cell stack module. | 07-02-2015 |
20150194696 | FUEL CELL STACK ENCLOSURE - A fuel cell stack enclosure is provided that includes side covers configured to be joined with each of end of a stack module respectively. A lower cover is also configured to be provided under the stack module and formed to partially cover a lower portion and a first side portion of an outer surface of the side cove. An upper cover may be provided over the stack module, and be formed to partially cover an upper portion and a second side portion of the outer surface of the side cover to enclose the stack module along with the lower cover while joining with the side covers. | 07-09-2015 |
20150343903 | SAFETY SYSTEM OF FUEL CELL VEHICLE AND CONTROL METHOD FOR THE SAME - Disclosed are a safety system of a fuel cell vehicle and a control method for the safety system. A safety system of a fuel cell vehicle using a fuel cell and a high voltage battery as a power source may include: a power switch disposed on a power wire connecting the power source and a power load to each other; an insulation resistance measuring device measuring an insulation resistance between the power wire and a chassis; and a controller controlling an operation of the power switch based on a measured insulation resistance measured by the insulation resistance measuring device. When the measured insulation resistance is equal to or less than a reference resistance, the controller enters a safe mode and the power switch is turned off to thereby block power supplied to the power load. | 12-03-2015 |
20150362560 | SYSTEM AND METHOD FOR DIAGNOSING STATE OF FUEL CELL STACK AND CONTROLLING FUEL CELL SYSTEM - A system and method for diagnosing the state of a fuel cell stack are provided. The method includes simultaneously applying currents having respective first and second frequencies to a fuel cell stack and computing Fourier transforms of output currents and voltages from the fuel cell stack based on the applied currents. A real part of a first frequency impedance and an imaginary part of a second frequency impedance are calculated using amplitudes and phases of currents and voltages having the first frequency and the second frequency among the computed output currents and voltages. Further, a state of the fuel cell stack is determined by magnitude of the calculated real part of the first frequency impedance and by magnitude of the calculated imaginary part of the second frequency impedance. | 12-17-2015 |
20160061902 | APPARATUS FOR DIAGNOSING A STATE OF A FUEL CELL STACK AND METHOD THEREOF - Disclosed are an apparatus and a method for diagnosing a state of a fuel cell stack with high accuracy by reducing the deviation of a harmonic component although the voltage variation of the fuel cell stack is substantial. According to the present invention, a harmonic component is detected by converting the difference between the voltage of the fuel cell stack and a moving average voltage to a frequency and the state of the fuel cell stack is diagnosed based on the size of the detected harmonic component. | 03-03-2016 |
20160087293 | VENTILATION APPARATUS AND CONTROL METHOD THEREOF - A ventilation apparatus includes: a controller that determines whether insulation resistance between a fuel cell stack and an enclosure including the fuel cell stack is equal to or smaller than a preset value, and varies a degree of opening of a valve provided between an inlet provided on one side of the enclosure and an air blower injecting air to an interior of the enclosure through the inlet based on the determination. | 03-24-2016 |
20160093903 | STATE DIAGNOSTIC APPARATUS OF FUEL CELL STACK - An apparatus for diagnosing a state of a fuel cell stack is provided. The apparatus may diagnose the state of the fuel cell stack without including the DC-DC converter which boosts the DC voltage and the inverter which converts the boosted DC voltage into the AC voltage. In particular, the apparatus may diagnose the state of the fuel cell by applying the rectangular wave of the single frequency having a duty ration of about 0.5 to the fuel cell stack, measuring the voltage of the fuel cell stack, detecting the even multiple harmonic component of the frequency of the rectangular wave by performing the frequency conversion on the measured voltage, and then diagnosing the state of the fuel cell stack based on the magnitude of the detected harmonic component. | 03-31-2016 |