• Title/Summary/Keyword: Hydrogen Electric Vehicle

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Comparison of WiFi Protocols for Safety Communication Between Hydrogen Refueling Station and Fuel Cell Electric Vehicle (수소충전소와 수소전기차간의 안전통신을 위한 WiFi 프로토콜 비교)

  • Ha-Jin Hwang;Dong-Geon So;Do-Ho Cha;Hye-Jin Chae;Seo-Hee Jung;Sung-Ho Hwang
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.23 no.6
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    • pp.81-87
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    • 2023
  • SAE J2601 and SAE J2799, the communication protocols between a hydrogen refueling station and a fuel cell electric vehicle, only cover hydrogen charging. In this paper, we measure the hydrogen detection, current, and voltage of a fuel cell electric vehicle and transmit the sensor data to the hydrogen refueling station by changing the WiFi protocol. A small-scale laboratory model was built using Raspberry Pi for sensing, controlling, and transmitting sensor data of a fuel cell electric vehicle. The sensor data was stored in the database of the hydrogen refueling station, and a dashboard was configured using Grafana to analyze the stored data. When hydrogen is detected, the dispenser valve of the hydrogen refueling station is locked. Then, we measured the average transmission delay according to the WiFi protocol. The results showed that IEEE 802.11a is the most suitable WiFi protocol for transmitting sensor data between the hydrogen refueling station and the fuel cell electric vehicle.

An Experimental Study on the Explosion of Hydrogen Tank for Fuel-Cell Electric Vehicle in Semi-Closed Space (반밀폐공간에서 발생되는 차량용 수소연료탱크 폭발 실험)

  • Park, Jinouk;Yoo, Yongho;Kim, Hwiseong
    • Journal of Auto-vehicle Safety Association
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    • v.13 no.4
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    • pp.73-80
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    • 2021
  • Recently, Korea has established a plan for the supply of hydrogen vehicles and is promoting the expansion of the supply. Risk factors for hydrogen vehicles are hydrogen leakage, jet fire, and explosion. Therefore Safety measures are necessary for this hazard. In addition, risks in semi-closed spaces such as tunnels, underground roads, and underground parking lots should be analyzed. In this study, an explosion experiment was conducted on a hydrogen tank used in a hydrogen vehicle to analyze the risk of a hydrogen vehicle explosion accident that may occur in a semi-closed space. As results, the effect on the structure and the human body was analyzed using the overpressure and impulse values for each distance generated during the explosion.

Commercial Hydrogen Vehicle Power Distribution Simulation Using Fuzzy Control (퍼지 제어를 이용한 수소 상용차 전력 분배 시뮬레이션)

  • JAESU HAN;JAESU HAN;JONGBIN WOO;SANGSEOK YU
    • Transactions of the Korean hydrogen and new energy society
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    • v.34 no.4
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    • pp.369-380
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    • 2023
  • There is no clear standard for estimating the power distribution of fuel cells and batteries to meet the required power in hydrogen electric vehicles. In this study, a hydrogen electric vehicle simulation model equipped with a vehicle electric component model including a fuel cell system was built, and a power distribution strategy between fuel cells and batteries was established. The power distribution model was operated through two control strategies using step control and fuzzy control, and each control strategy was evaluated through data derived from the simulation. As a result of evaluation through the behavior data of state of charge, fuel cell current and balance of plant, fuzzy control was evaluated as a proper strategy in terms of control stability and durability.

Design Characteristics on Electric Drivetrain for Electric Vehicle Based on Driving Performance

  • Park, Ji-Seong;Jung, Sang-Yong
    • Journal of IKEEE
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    • v.13 no.3
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    • pp.47-54
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    • 2009
  • Design consideration on electric drivetrain(E-D/T), usually referred as electric motor for driving, its compatible reduction gear, and inverter, are performed for developing electric vehicle(EV) with efficient driving performance. Universal mode of driving cycle has been used to make up the actual vehicle performance, and its results are incorporated to the design of E-D/T.

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Green pathway to hydrogen fuel cell vehicle (수소 연료전지차로의 전환을 위한 녹색 전략)

  • Lee, Munsu;Lee, Minjin;Lee, Younghee
    • 한국신재생에너지학회:학술대회논문집
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    • 2011.11a
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    • pp.152.1-152.1
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    • 2011
  • This study analyzes transitions to a green path in transportation system in South Korea. We develop transportation system model with four new technology options, green cars; Hybrid electric vehicle, plug-in hybrid vehicle, electric vehicle and fuel cell vehicle. Among those technologies fuel cell vehicle is the best option assuming no GHG emissions when driving. We use MESSAGE model to get an optimal solution of pathway for high deployment of fuel cell vehicles under the Korea BAU transportation model. Among hydrogen production sources, off gas hydrogen is most economic since it is hardly used to other chemical sources or emits in South Korea. According to off gas hydrogen projection it can run 1.8 million fuel cell vehicles in 2040 which corresponds to 10% of all passenger cars expected in Korea in 2040. However, there are concerns associated with technology maturity, cost uncertainty which has contradictions. But clean pathway with off gas and renewable sources may provide a strong driving force for energy transition in transportation in South Korea.

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Development of Fuel Economy Measurement Technology for Fuel Cell Electric Vehicle (수소연료전지차 연비 평가기술 개발)

  • Jung, Young-Woo;Park, Jeong-Kyu;Ye, Chang-Hwan;Park, Jong-Jin;Oh, Hyung-Seuk
    • 한국신재생에너지학회:학술대회논문집
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    • 2007.11a
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    • pp.152-155
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    • 2007
  • Fuel cell electric vehicles (FCEVs) using hydrogen gas are zero emission vehicles, thus emission measurement for combustion vehicles is not applicable. The hydrogen gas consumption for fuel economy will be measured by the stabilized pressure/temperature method, mass flow method and electrical current method, etc. In this research, weight method with a newly manufactured test equipment is applied to measure the hydrogen consumption because above 3-methods have a deviation. The hydrogen consumption is directly calculated by the weight differences of the external hydrogen tank before and after the chassis dynamometer test. Ultimately the fuel economy for FCEVs is obtained with a deviation less than 1% in all chassis dynamometer tests.

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Study of Hydrogen Bus Operational Safety Monitoring Method through Driving Data Analysis (주행 데이터 분석을 통한 수소버스 운행안전 모니터링 기법 연구)

  • Hyunmi Lee;Insik Lee;Yongju Yi;Jeong-Ah Jang;Siwoo Kim;Sojung Sim
    • Journal of Auto-vehicle Safety Association
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    • v.15 no.4
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    • pp.58-64
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    • 2023
  • The adoption of hydrogen-powered Elec is expanding globally. Hydrogen is recognized as a potentially hazardous energy source, and safety assessment is crucial for the development of plans to supply hydrogen-powered electric buses. Hydrogen gas leakage can have a significant impact during bus operations, and continuous hydrogen leakage in hydrogen-powered vehicles can result in fatal accidents. In this study, information about hydrogen leakage is collected through sensors installed within the vehicles and is measured when the sensor detects a leak. The study also proposes the use of Pseudo Fuel Leakage (PFL, %) as an additional indicator for evaluating and monitoring hydrogen safety and leakage.

Modeling of Hydrogen Recirculation System for Fuel Cell Vehicle (수소 연료전지차의 재순환시스템 모델링 연구)

  • Kim, Jae-Hoon;Noh, Young-Gyu;Jeon, Ui-Sik;Lee, Jong-Hyun
    • Transactions of the Korean hydrogen and new energy society
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    • v.22 no.4
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    • pp.481-487
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    • 2011
  • A fuel cell vehicle using a polymer electrolyte membrane fuel cell (PEM FC) as power source produces electric power by consuming the fuel, hydrogen. The unconsumed hydrogen is recirculated and reused to gain higer stack efficiency and to maintain the humidity in the anode side of the stack. So it is needed considering fuel efficiency to recirculated hydrogen. In this study, the indirect hydrogen recirculation flow rate measurement method for fuel cell vehicle is presented. By modeling of a convergent nozzle ejector and a hydrogen recirculation blower for the hydrogen recirculation of a PEM FC, the hydrogen recirculation flow rate was calculated by means of the mass balance and heat balance at Anode In/Outlet.

Study on the Electric Insulation Characteristics in a Fuel Cell Vehicle (연료전지 차량의 전기적 절연 특성에 관한 연구)

  • Yu, Jung-Han;kim, Duck-Whan;Kim, Ju-Han;Jeong, Kwi-Seong;Kum, Young-Bum;Kim, Sae-Hoon;Ahn, Deuk-Kuen
    • Transactions of the Korean hydrogen and new energy society
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    • v.23 no.2
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    • pp.150-155
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    • 2012
  • Polymer Electrolyte Membrane Fuel Cell (PEMFC) stack power output is needed to be approximately 100 kW to meet the requirements of automotive applications. In order to secure the electric safety for drivers, passengers and mechanics, it is very important to understand phenomena of an electric insulation in a fuel cell vehicle. In this study, we studied the electric insulation properties and the insulation resistance of stack, system and vehicle in the field of fuel cell was estimated at the applied voltage of 500 V, respectively. Also we discussed the insulation factors such as the conductivity of coolant, the element of vehicle design and the intrinsic resistance of the vehicle components.

A Study on Electromagnetic Interference of Electric Vehicles with Variations of Charging Device Inlet Location (전기자동차 충전구 위치에 따른 전자파 방사특성에 관한 연구)

  • Gwon, Sunmin;Woo, Hyungu
    • Transactions of the Korean Society of Automotive Engineers
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    • v.24 no.6
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    • pp.694-701
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    • 2016
  • According to revolutionary developments in automobile technologies, eco-friendly advanced vehicles (hybrid vehicle, hydrogen fuel-cell vehicle, electric vehicle, etc.) are rapidly increasing. The electromagnetic compatibility is getting more important for development of a vehicle because those advanced vehicles are driven by electric energy and equipped with more electric systems. In general, electromagnetic compatibility tests consist of an electromagnetic interference(EMI) test and an electromagnetic susceptibility(EMS) test. EMI test of the electric vehicles are needed not only in driving mode but also in charging mode because they must be recharged by much electric energy for driving. Depending on vehicle manufacturers, the charging device type and the location of charging device inlet in electric vehicles are various. In this paper, in order to investigate EMI of electric vehicles in charging mode in consideration of the direction of measuring antenna and the location of charging device inlet, a series of electromagnetic emission tests are conducted using three electric vehicles (neighborhood electric vehicle, electric vehicle and electric vehicle-bus). The test results show that electromagnetic emission measurements in charging mode are dependent on the direction of measuring antenna and the location of charging device inlet.