Hyundai Motor Company

Kia Motors Corporation

Kia Corporation

Riiid Inc.

Postech Academy-industry Foundation

Alfred Inc.

Soon Woo Kwon

Joon Yong Lee

Dong Hun Lee

Min Woo Kang

Seung Hyun Hong

Chung An Lee

Ik Jae Son

Jung Hwan Ryu

Kyung Hoon Kim

Sung Do Kim

Kyu Il Lee

Sung Chul Cha

Seo Ho Choi

Young Pin Jin

Sung Jin Chung

Boung Ho Min

Chang Seok Ryu

Jae We Heo

Min Sung Noh

Hyun Ki Kim

Jin Seo Yoon

Hyun Jae Lee

Dae Jong Kim

Jae Won Jung

Sang Uk Kwon

Ki Chang Kim

Chang Seok You

Sung Gone Yoon

Tae Heon Kim

Jun Young Park

Hyeon Seok Ban

Hyuk Soo Kim

Young Nam Kim

Ja Beom Koo

Sung Mun Cho

In Woo Jang

Kwang Hee Nam

Jae Gwang Lee

Min Ha Kang

Mi Sun Kim

Sung Yoon Jung

Moon Ki Bae

Seong Guk Son

Jin Seok Hong

Jun Yun Kang

An apparatus for estimating an amount of condensed water in an anode of a fuel cell system includes: an initial anode water vapor amount calculation unit to calculate an initial amount of water vapor in the anode of a fuel cell upon startup, an anode diffusion amount calculation unit to calculate an amount of HO diffused from a cathode to the anode, a purge amount calculation unit to calculate an amount of water vapor discharged upon gas purging in the anode, a recirculation amount calculation unit to calculate the amount of water vapor recirculated to the anode, and a condensed water amount determination and water level estimation unit to calculate the actual amount of water vapor in the anode based on values calculated using these units and to calculate the amount of condensed water in a water trap.

Apparatus and method for estimating an amount of condensed water in an anode of a fuel cell system and method of controlling a drain valve using same

Proposed are a composition for production of cat litter, cat litter, and a method for production of cat litter, the composition including: 45% to 58% by weight of coffee grounds; 40% to 50% by weight of natural polymer; 0.03% to 3% by weight of polymer gum; and 0.5% to 5% by weight of sodium alginate.

Composition for producing cat litter using coffee grounds, cat litter, and method for producing cat litter

A method of distributing power in a fuel cell system including a plurality of fuel cell stacks, includes determining, by a controller, a total system power demand, which is a power demand of the fuel cell system, determining an operation order of the fuel cell stacks based on a state of the fuel cell stacks, determining the number of operation fuel cell stacks among the plurality of fuel cell stacks based on the total system power demand and an average available power of the fuel cell stacks, determining operation target fuel cell stacks based on the operation order of the fuel cell stacks and the number of operation fuel cell stacks, and determining a power demand of each of the operation target fuel cell stacks based on the total system power demand and an effective catalyst reaction area ratio of each fuel cell stack included in the operation target fuel cell stacks.

Method of distributing power in fuel cell system

An apparatus and a method for segmenting a steel microstructure phase are provided. The apparatus includes a storage configured for storing a machine learning algorithm and a processing device that segments a microstructure phase using the machine learning algorithm. The processing device is configured to receive label data, to learn a machine learning model by use of the label data as learning data for the machine learning model, and to segment a phase of a steel microstructure image by use of the learned machine learning model.

Apparatus and method for segmenting steel microstructure phase

A power generation control system of a fuel cell includes: the fuel cell generating a power through a chemical reaction between fuel and air; a consuming device connected to an output terminal of the fuel cell and consuming the power output from the fuel cell; a converter connected between the fuel cell and the consuming device in series or parallel and adjusting an output voltage of the fuel cell; a supply device supplying the air to the fuel cell; a voltage controller controlling the converter on the basis of a required power or current of the fuel cell required to be output; and a supply controller controlling the supply device on the basis of the required power or current of the fuel cell required to be output.

Power generation control system and method of a fuel cell

A water discharge control system and method for a fuel cell are provided. The water discharge control system includes a fuel cell stack that generates power through an internal chemical reaction, a fuel supply line that recirculates fuel discharged from the fuel cell stack and supplies the fuel to the fuel cell stack, and a water trap that is disposed in the fuel supply line to store water generated in the fuel cell stack. A drain valve is disposed in an outlet port of the water trap to block discharge of the water stored in the water trap to the outside when closed. A drain controller determines whether fuel in the fuel supply line is being discharged through the outlet port when the drain valve is in an open state and closes the drain valve upon determining that fuel is being discharged.

Water discharge control system and method for fuel cell

The present invention relates to a method for displaying learning content of a terminal and an application program therefor. The method for displaying learning content of a terminal of the present invention comprises the steps of: displaying text with a group of questions on a first layer; displaying a first question card corresponding to a first question on a second layer; and when a continuous touch gesture in a touch input is received in the second layer, displaying, on the second layer, a second question card corresponding to a second question according to the touch gesture, wherein the question card includes one or more examples that are selectable by a learner. According to the present invention, it is possible to effectively display learning content including a large amount of information such as multiple choice questions on a limited size screen.

Method for displaying learning content of terminal and application program therefor

A system and method for controlling operation of a fuel cell are provided. The method includes estimating an effective catalyst amount within a fuel cell stack and monitoring a change in the estimated effective catalyst amount according to time. An irreversible degradation state of the fuel cell stack is determined based on the monitored change in the estimated effective catalyst amount.

Method and system for controlling operation of fuel cell

A system for estimating the amount of purge of a fuel cell is provided. The system includes a fuel cell that generates power by receiving hydrogen at an anode side and receives oxygen at a cathode side. A recirculation line is connected with the anode side of the fuel cell, and the gas included hydrogen therein is circulated in the recirculation line. A flow amount estimator estimates the flow amount of gas inside the recirculation line. A purge valve is positioned in the recirculation line and discharges the gas in the recirculation line to the outside when opened. A purge amount estimator estimates the amount of purge for each gas discharged through the purge valve by reflecting the flow amount of the gas estimated by the flow amount estimator.

System for estimating amount of purge of fuel cell, and system and method for estimating hydrogen concentration of fuel cell using the same

A control method for a fuel cell stop mode is provided. The method includes measuring an air flow rate supplied to a fuel cell stack and when a fuel cell stop mode is entered, determining an oxygen distribution state between cells included in the fuel cell stack based on the measured air flow rate. Air supply is then supplied to the fuel cell stack or the air supply to the fuel cell stack is interrupted based on the determined oxygen distribution state.

Control method and control system for fuel cell stop mode

Disclosed are a deterioration estimation system for the fuel cell, a hydrogen supply system for a fuel cell including the same, and a hydrogen supply method for a fuel cell, the deterioration estimation system including a fuel cell which receives hydrogen gas and oxidizing gas respectively supplied to an anode side and a cathode side thereof to generate electrical power, a hydrogen supply line which is connected to the anode side of the fuel cell and supplies gas containing hydrogen gas to the fuel cell, a hydrogen supply valve which is located between the hydrogen supply line and a hydrogen tank, supplies, when opened, hydrogen gas stored in the hydrogen tank to the hydrogen supply line, and blocks the supply of the hydrogen gas when closed, and a deterioration estimating unit which estimates the deterioration state of the fuel cell, based on the opening and closing control of the hydrogen supply valve or a change in the pressure in the hydrogen supply line.

Deterioration estimation system for fuel cell, hydrogen supply system for fuel cell including same, and hydrogen supply method for fuel cell

A copper alloy for valve seats, and more particularly a copper alloy for valve seats with improved wear resistance, contains 12 to 24% by weight of Ni, 2 to 4% by weight of Si, 7 to 13% by weight of Cr, 20 to 35% by weight of Fe, and a balance of Cu and other impurities.

Copper alloy for valve seats

Disclosed is a system for determining a hydrogen supply failure of a fuel cell, the system including: a fuel cell, a plurality of hydrogen tanks having hydrogen, a hydrogen supply line connected to the hydrogen tanks and supplying hydrogen from the hydrogen tanks to the fuel cell, a plurality of tank valves mounted on the hydrogen tanks, respectively, and discharging hydrogen in the hydrogen tanks to the hydrogen supply line when opening, a pressure sensor sensing pressure in the hydrogen supply line, and a determiner determining poor opening of the hydrogen tanks on the basis of pressure information sensed by the pressure sensor.

System and method for determining hydrogen supply failure of fuel cell

A system for estimating a concentration of hydrogen in a fuel cell is provided. The system includes a hydrogen supply line supplying the hydrogen to the fuel cell and a time measurement sensor measuring a time duration from a point in time when an operation of the fuel cell ends to a point in time when the fuel cell restarts. A controller estimates an amount of air introduced into the fuel cell during the time duration using the measured time duration and estimates a concentration of hydrogen in the hydrogen supply line at the time of restarting the fuel cell based on the measured time duration and the estimated amount of introduced air.

System and method for estimating concentration of hydrogen in fuel cell

Growing community of inventors

Seoul, South Korea

Soon Woo Kwon