We have global competitiveness as we take the lead in the production of eco-friendly and
high-efficiency electromechanical part technology.
SEJONG INDUSTRIAL Co., Ltd. is acquiring core part technology in preparation for full-scale
commercialization of hydrogen fuel cell automobiles, and is doing its utmost to develop fusion technology
grafted with electro-mechanical technology as well as to take the initiative in the development of intelligent
smart car technology.
- Metal bipolar plate for fuel cell vehicles
- Metal bipolar plate is core component of the fuel cell stack along with GDL(Gas Diffusion Layer),
MEA(Membrane Electrode Assembly). Hydrogen and air, which are reaction gases, are uniformly supplied
to the active area by metal bipolar plate. Also, it functions as a current transfer and water
emissions generated by the electrochemical reaction.
Research, product development performance and success case
2015. 08 : Development of non-humidified MEA and metal bipolar plate (National R&D
2018. 09 : Development of large-area metal bipolar plate (National R&D project)
- Hydrogen Sensor
- This is a sensor for detecting hydrogen leaks and evaluating the safety of the vehicle. We are the
first company in Korea which has succeeded in developing the hydrogen sensor using MEMs technology
and the first to mass produce this part.
- Pressure Sensor
- This is a sensor for monitoring the operating pressure of the hydrogen pipe and fuel cell stack
entrance/exit which leads from the hydrogen storage device. It uses fuel cell system hydrogen gas,
and because it is operated in an environment of high humidity, there are still a variety of issues
to be resolved due to freezing in cold climates. SEJONG INDUSTRIAL Co., Ltd.’s pressure sensor being
developed and prepared for mass production with a combined-function which is safe, overcomes
climate-related problems, and measures both pressure and temperature.
- Pressure Relief Valve–H2
- This is safety equipment which is installed in order to protect the system by reacting to pressure
which has exceeded regulations during abnormal operation of the fuel cell system while driving.
SEJONG INDUSTRIAL Co., Ltd. has developed a pressure relief valve for optimum performance in a humid
hydrogen environment, thereby contributing to the safety of fuel cell cars.
- Water Trap
- This is a functional component to control the condensation of vapor produced in the fuel cell
stack in order to optimize the performance and reinforce the durability of hydrogen fuel cell
vehicles. At SEJONG INDUSTRIAL Co., Ltd., we have developed a non-contact water level sensor which
has superior responsiveness to precise detection of the water level without coming into direct
contact with the condensate. It is a highly reliable product with optimum performance in a hydrogen
gas environment, as required in micro-engineering.
Hydrogen Supply and Discharge Technology for Hydrogen Fuel Cell Vehicles
Our R&D Center is ensuring the safety of fuel cell vehicles by developing a hydrogen supply system core
module to supply, recycle and discharge hydrogen gas with a suitable pressure and flow rate to the fuel cell
stack, which contributes to performance optimized to all environments. SEJONG R&D Center is accelerating
continuous development of new technologies.
We are focusing not only on reinforcing durability, but also on ensuring low temperature ignition and
perfecting hydrogen emissions reduction technology to remove the hazard of surplus gas in preparation for
mass commercialization of future eco-friendly vehicles.
High Precision Sensor Chip Design Technology which Combines MEMs process
By securing thin-film design technology combining micro electromechanical system process technology, we have
improved low-power consumption and reaction speed which are the core performance components of the sensor.
The high-precision sensor chip design technology is an advanced technology which makes it possible to
establish foundation of mass production, increasing product price competitiveness and improving
SEJONG INDUSTRIAL Co., Ltd. will not hesitate to actively invest in and supporting
research and development for the procurement of advanced technology in the domestic sensor market which
currently relies on imports.
Exhaust After-treatment to reduce Nitrogen Oxide
We are doing everything we can at SEJONG INDUSTRIAL Co., Ltd. to secure technology to reduce nitrogen oxide
in exhaust gas in accordance with the globally tightening regulations on emissions (Euro-6, NOx).
The urea-SCR system which injects urea (aqueous ammonia) into the exhaust system via the dosing control
unit, purifies harmful gas contained in the exhaust gas by using a redox reaction of nitrogen oxide. We are
endeavoring to promote technological development for full-scale commercialization by introducing advanced
technology to ensure improved performance and reliability of the urea-SCR system to secure our own
Technology for Electromagnetic Wave Resistance Circuit Design
As semiconductor chip technology becomes miniaturized and obtains high-speed and low-power capability, the
electromagnetic resistance of electronic devices may become lowered. Since sensors and control devices, etc.
are particularly connected with the safety of the driver, there is a need for design technology which can be
applied to external electromagnetic disturbance as well.
SEJONG INDUSTRIAL Co., Ltd. is preventing system malfunction caused by external electromagnetic disturbance
and possesses unrivaled design device/circuit/software design technology which doesn't damage performance or
hinder external leakage radiation of high-frequency power. We combine high-frequency external interference
waves with electromagnetic waves to prevent adverse effects on the system through noise filtering and PCB
Manufacturing technology of metal bipolar plate
SEJONG EV has flow field forming technology for each thin plate metal material. In addition, SEJONG EV has
gasket technology for airtightness and coating technology for improving bipolar plate performance for
corrosion / durability / conductivity.
Also, SEJONG EV built manufacturing technologies such as assembling, inspection and evaluation, and are
producing metal bipolar plate on a large scale. Finally, SEJONG EV is developing technology in various fuel
cell fields by investing actively and supporting commercialization.