Hyundai Motor Company

Industry-university Cooperation Foundation Hanyang University

Kangnam University Industry-academia Cooperation Foundation

Industry-academy Cooperation Foundation, Scnu

Korea Automotive Technology Insitute

Seung Chan Oh

Jong Hyun Lee

Jae Jun Ko

Young Min Kim

Ik Jae Son

Jong Jin Yoon

Sae Hoon Kim

Ho Young Lee

Yoo Chang Yang

Duck Whan Kim

Young Bum Kum

Kwi Seong Jeong

Jung Do Suh

Byung Ki Ahn

Sang Mun Chin

Tae Won Lim

Myung Ju Jung

Hwan Soo Shin

Se Joon Im

Young Hyun Lee

Young Mo Goo

Won Gyu Choi

Hye Mi Jung

Seung Eul Yoo

Myong Hwan Kim

Suk Kee Um

Seung Ryeol Yoo

Kwon Pil Park

Jong Guen Yoon

Chang Won Jung

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.

Monitoring the operational state of a fuel cell stack

The present invention provides a fuel cell bipolar plate and a method for manufacturing the same, in which a carbon or metal fuel cell bipolar plate is surface-treated with a complex transition metal oxide, which is a main component of a variable resistance heating element having a negative temperature characteristic, so that the bipolar plate can ensure a sufficient amount of heat, required to prevent product water from freezing, by itself in a short time without any external energy, thus improving cold start performance of a fuel cell vehicle at a temperature below zero.

Fuel cell bipolar plate and method for manufacturing the same

The present invention provides an apparatus and method for determining deterioration of a fuel cell, the method including measuring in real time fluoride ion concentration or pH value of outflow water from a fuel cell stack during operation in a fuel cell vehicle, calculating a fluoride emission rate from the measured value and, if the calculated fluoride emission rate is out of a predetermined normal range, determining deterioration of an electrolyte membrane of the fuel cell stack.

Apparatus and method for determining deterioration of a fuel cell and method for preventing deterioration of the same

Apparatuses and methods for accelerated activation of fuel cells are disclosed. The apparatuses include a fuel cell stack; an air supplying means coupled to a cathode catalyst side of the fuel cell stack through a mass flow controller and a humidifier; a hydrogen supplying means coupled to an anode catalyst side of the fuel cell stack through a mass flow controller and a humidifier; and a cable coupled to both ends of the fuel cell stack for short-circuiting the cathode and the anode.

Apparatus and method for acceleratively activating fuel cell

A separating plate for a fuel cell includes first and second plates, each provided with a hydrogen channel, an oxygen channel, and a coolant channel. The first and second plates are attached to one another to form a main plate such that the first and second hydrogen, oxygen, and coolant channels compose main hydrogen, oxygen, and coolant channels, respectively. The main hydrogen and oxygen channels are fluidly isolated from each other. Distal ends of the main channels each communicate with a manifold through a communication passageway configured to supply hydrogen, oxygen, or coolant to a corresponding one of the main channels.

Separating plate for fuel cell

The present invention relates to an anode side hydrogen/oxygen interface formation inhibition structure of a fuel cell vehicle which prevents a high voltage field due to hydrogen/oxygen interface formation from being formed so that a stable stack driving may be realized when the fuel cell vehicle starts up or shuts down.

Anode side hydrogen/oxygen interface formation inhibition structure of a fuel cell vehicle

Growing community of inventors

Gyeonggi-do, South Korea

Seung Chan Oh