Hyundai Motor Company

Kia Motors Corporation

Korea Advanced Institute of Science and Technology

Korea Institute of Science and Technology

Kangnam University Industry-academia Cooperation Foundation

Dae Won Kang Up Co., Ltd.

Wooshin Industrial Co., Ltd.

Hyundai Autron Company Ltd.

Pohang University of Science and Technology Foundation

Industry-academy Cooperation Foundation, Scnu

Sae Hoon Kim

Yoo Chang Yang

Young Bum Kum

Byung Ki Ahn

Sang Mun Chin

Jung Do Suh

Bo Ki Hong

Kwi Seong Jeong

Duck Whan Kim

Suk Min Baeck

Seong Il Heo

Dai Gil Lee

Myoung Woon Moon

Kwang Ryeol Lee

Ha Na Yu

Jae Jun Ko

Kook Il Han

Haeng Jin Ko

Hyun-Seok Park

Tae Won Lim

Young-Hyun Lee

Jong Hyun Lee

Jung Han Yu

Young Woo Noh

Uck-Soo Kim

Jun Woo Lim

Young Min Kim

Sung Ho Lee

Soon Il Jeon

Sung Gone Yoon

Sung Keun Lee

Sang Hyun Cho

Kang Sik Jeon

Hwan Soo Shin

Dong Yol Yang

Sang Yeoul Ahn

Sung Mun Cho

Seung Chan Oh

Chang Jun Lee

Seung Min Ryu

Junghan Yu

Ji Yong Kim

Nam Young Cho

Jin Yong Park

Chul Ho Yim

Ho Young Lee

Jong Sung Kim

Young Tae Kim

In Woong Lyo

Sang Uk Kwon

JuHan Kim

Nam Woo Lee

Sang Shin Lee

Jung Jae Lee

Sang Mun Jin

Yun Seok Kim

Jong Kil Oh

Yong Sun Park

Ik Jae Son

Kyu Hwan Oh

Myung Ju Jung

Chang Woo Lee

Woo Suk Sung

Jong Jin Yoon

Seong Su Kim

Se Joon Im

Jeong Uk An

Min Kyu Song

Seung Gyun Ahn

Kyu Taek Cho

Byoung Chul Kim

Young Hyun Lee

Yong Hyun Lee

Ji Hoon Jeon

Bu Gi Kim

Haengjin Ko

Eun Kyu Her

Young Min Nam

Seong Jin Cho

Uck Soo Kim

In Uk Hwang

Young Hwan Ko

Seung Ryeol Yoo

Jong Guen Yoon

Kwon Pil Park

Chang Won Jung

Woon Bong Hwang

Disclosed are a method for manufacturing a polymer electrolyte membrane for fuel cells in which a plurality of porous reinforcement films and ionomer layers are continuously disposed or stacked, and a polymer electrolyte membrane for fuel cells manufactured thereby. The polymer electrolyte membrane for fuel cells includes the porous reinforcement films, thus having excellent mechanical stiffness and improved physical durability. Further, the polymer electrolyte membrane for fuel cells includes an ionomer layer including a catalyst for decomposing peroxide configured to block gas crossover and may thus minimize performance degradation due to gas crossover and prevent an electrical short, and the polymer electrolyte membrane for fuel cells makes it easy to adjust the position of the ionomer layer in the electrolyte membrane in the thickness direction and may thus effectively mitigate gas crossover.

Method for manufacturing polymer electrolyte membrane for fuel cells and polymer electrolyte membrane for fuel cells manufactured thereby

The present invention provides a fuel cell stack with enhanced freeze-thaw durability. In particular, the fuel cell stack includes a gas diffusion layer between a membrane-electrode assembly and a bipolar plate. The gas diffusion layer has a structure that reduces contact resistance in a fuel cell and is cut at a certain angle such that the machine direction (high stiffness direction) of GDL roll is not in parallel with the major flow field direction of the bipolar plate, resulting in an increased GDL stiffness in a width direction perpendicular to a major flow field direction of a bipolar plate.

Fuel cell stack with enhanced freeze-thaw durability

An apparatus and a method for detecting leakage in a hydrogen tank of a hydrogen fuel cell vehicle are provided. Particularly, leakage is detected due to failure of an airtight seal of a solenoid valve in a hydrogen tank based on a change of the sensing value of a high pressure sensor which represents a hydrogen tank pressure during a process of performing a wakeup operation at the time of key-off of a vehicle.

Apparatus and method for detecting leakage in hydrogen tank of hydrogen fuel cell vehicle

The present invention provides a porous medium with increased hydrophobicity and a method of manufacturing the same, in which a micro-nano dual structure is provided by forming nanoprotrusions with a high aspect ratio by performing plasma etching on the surface of a porous medium with a micrometer-scale surface roughness and a hydrophobic thin film is deposited on the surface of the micro-nano dual structure, thus significantly increasing hydrophobicity. When this highly hydrophobic porous medium is used as a gas diffusion layer of a fuel cell, it is possible to efficiently discharge water produced during electrochemical reaction of the fuel cell, thus preventing flooding in the fuel cell. Moreover, it is possible to sufficiently supply reactant gases such as hydrogen and air (oxygen) to a membrane electrode assembly (MEA), thus improving the performance of the fuel cell.

Porous medium with increased hydrophobicity and method of manufacturing the same

A safety apparatus uses a fuel cell and a high voltage battery as a power source, and includes: a first voltage sensor that measures a voltage of a positive side of a voltage bus; a second voltage sensor that measures a voltage of a negative side of the voltage bus; and a controller that determines an electrical insulation between the positive side of the voltage bus and the electrical chassis based on the voltage of the positive side of the voltage bus and determines an electrical insulation between the negative side of the voltage bus and the electrical chassis based on the voltage of the negative side of the voltage bus.

Safety apparatus of fuel cell vehicle and method for controlling the safety apparatus

A fuel cell system and a method of controlling the fuel cell system are provided. The fuel cell system includes at least one bypass valve that is disposed between a passage in an inlet of a fuel cell stack and a bypass passage that is branched from the passage within the inlet and that is connected to a discharge port of the fuel cell stack. In addition, a controller bypasses air supplied from an air blower to the discharge port by adjusting an opening degree of the bypass valve.

Fuel cell system and method of controlling the same

A fuel cell system includes an air supply unit for supplying air containing oxygen to a fuel cell stack. A humidifier humidifies the supplied air. An air supply line is connected between a cathode inlet of the fuel cell stack and the humidifier to supply the humidified air to the fuel cell stack. A cathode-side exhaust line is connected between a cathode outlet of the fuel cell stack and the humidifier to supply a cathode exhaust gas discharged from a cathode of the fuel cell stack to the humidifier for humidification in the humidifier. A unified valve module includes a bypass line connected between the air supply line and the cathode-side exhaust line and an outward discharge port discharging the cathode exhaust gas to outside, and controls a gas flow between the humidifier and the fuel cell stack and between the bypass line and the outward discharge port.

Fuel cell system having valve module between fuel cell stack and humidifier

Disclosed is a fuel cell with enhanced mass transfer characteristics in which a highly hydrophobic porous medium, which is prepared by forming a micro-nano dual structure in which nanometer-scale protrusions with a high aspect ratio are formed on the surface of a porous medium with a micrometer-scale roughness by plasma etching and then by depositing a hydrophobic thin film thereon, is used as a gas diffusion layer, thereby increasing hydrophobicity due to the micro-nano dual structure and the hydrophobic thin film. When this highly hydrophobic porous medium is used as a gas diffusion layer for a fuel cell, it is possible to reduce water flooding by efficiently discharging water produced by an electrochemical reaction of the fuel cell and to improve the performance of the fuel cell by facilitating the supply of reactant gases such as hydrogen and air (oxygen) to a membrane-electrode assembly (MEA).

Fuel cell with enhanced mass transfer characteristics

The present invention provides a fuel cell separator with a gasket manufactured by integrally forming a gasket on one side of a separator; independently injection molding a frame gasket on a frame such that a first airtight portion covers the entire surface of the frame to maintain the shape of the frame gasket and a second airtight portion projects upward and downward from both ends of the first airtight portion; and bringing the first airtight portion of the frame gasket into contact with the other side of the separator with the gasket formed on one side thereof. To create a fuel cell stack in certain embodiments, the invention stacks the second airtight portion of the frame gasket on another second airtight portion of an adjacent unit cell with a membrane-electrode assembly interposed therebetween.

Fuel cell separator with gasket and method for manufacturing the same

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.

Manifold block for fuel cell stack

A method and an apparatus using a power transistor in a fuel cell stack diagnostic system provides an apparatus using a power transistor in a fuel cell stack diagnostic system. The apparatus includes a regenerative braking detector that detects regenerative braking of a fuel cell vehicle equipped with a fuel cell stack diagnostic system; a voltage rise determiner that determines whether a voltage rise due to regenerative braking of a fuel cell vehicle is a predetermined value or more; and a power transistor controller that controls an AC signal generator so that the voltage due to the regenerative braking is discharged by the power transistor, when the voltage rise due to regenerative braking determined by the voltage rise determiner is a predetermined value or more.

Method of utilizing power transistor of fuel cell stack diagnostic system

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.

Apparatus for diagnosing fault of fuel cell stack

A diagnostic system and method for a fuel cell stack that diagnoses the state and/or failure of the fuel cell stack. More specifically, the diagnostic control analyzer diagnoses and analyzes the state of the fuel cell stack by measuring the voltage and the current received from the fuel cell stack. To do this, an AC signal generator cogenerates a diagnostic AC signal according to the control upon receiving a control command form the analyzer, and an AC component driving element is then driven upon receiving the AC signal that is output from the AC signal generator in order to include a diagnostic AC component within the current of the fuel cell stack. In particular, the diagnostic control analyzer diagnoses the fuel cell stack based on a voltage and a current received from the fuel cell stack that includes the AC component via a load.

Diagnostic system and method for fuel cell stack

Growing community of inventors

Gyeonggi-do, South Korea

Sae Hoon Kim