Development of Fuel Cell System for New Fuel Cell Vehicle

Hiroyasu Ozaki･Asao Uenodai･Kaoru Yamazaki･Shuto Maniwa･Takayuki Ogawa (Honda R&D)

A new fuel cell system with more than twice the durability and 1/9 the cold start time of the previous model has been developed and installed in the new FCV. In addition to the evolution of the fuel cell itself, durability was improved by controlling the amount of humidification. Humidity control during system shutdown and rapid warm-up control during start-up have reduced start-up time in low-temperature environments. This technology is applicable to applications other than automobiles.

Development of New Structural Fuel Cell Stack

Choichi Ishikawa･Manabu Iwaida･Hideharu Naito･Shigeru Inai･Hiromichi Yoshida (Honda R&D)･Nobuyoshi Muromoto (Honda Motor)

Developed a new structural fuel cell stack for the fuel cell system installed in new FCV.
Adopts new stack structure technologies such as reducing the number of fuel cell stack structural parts, adopting a metal beed seal for the separator seal, and reducing the amount of platinum in the catalyst.
Achieved cost reduction and more than double the durability compared to the previous model.

A Study on the Effect of Multivariable Control for Performance Improvement of a Fuel Cell Hybrid Test Train

Takashi Yoneyama (Railway Technical Research Institute)･Shun Yoshioka･Yida Bao･Minhao Wen･Wei-Hsiang Yang･Yushi Kamiya (Waseda University)･Takayuki Kashiwagi･Kenichi Ogawa･Manato Kaneko･Manato Kanzaki (Railway Technical Research Institute)

The fuel cell hybrid test train requires methods to control fuel cell output power. The acceleration and regenerative-brake performance of the train varies with the SOC of the battery. And, the energy consumption also varies with the passenger occupancy and the ambient temperature. Therefore, we studied the traction performance and fuel consumption depending on the difference of the control methods and the number of parameters to be considered with using a driving energy simulator.

Characteristics of Fuel Cell Models Used in Model-Based Development and its Application to Simulation (Second Report)

Kazuhiko Kurokawa･Tomoaki Takagi (MCOR)･Tinh Nhan Nguyen (Sync Partners)･Kensuke Tsukahara･Yuji Yajima (MCOR)

In the current development of fuel cell vehicles based on the MBD process, concurrent development of mechanical design and control design using 1D-CAE tends to be important. To achieve the development, it is desirable to utilize appropriate plant models depending on the objectives in the development process. This paper focuses on the plant models of the fuel cell applied to each process and introduces the characteristics included in the examples.

A Study on the Risk Reduction Technology of Self-Ignition of High-Pressure Hydrogen Gas for Improving Fire Safety on the FCEV

Dong Sun Lee･Jeong Hyun Ham･Hae Pin Choi (Hyundai Motor)

Hydrogen is a promising energy carrier in a view of the environmental protection and the exhaustion of fossil fuel resources among the alternative energies. However, the technology that can safely use hydrogen has to be a priority before utilizing hydrogen system. In this study, the self-ignition phenomenon is investigated especially focusing on the TPRD of FCEV system under high pressure hydrogen gas, and the mechanism for the formation of self-ignition condition was verified associated with experiment of hydrogen storage system on the commercial vehicle. As a result of experiment, it is possible that the self-ignition phenomenon is induced on hydrogen storage system with emission pipe and glass bulb by shock wave and mixing zone, even though the system has no ignition source. The fusible metal TPRD can be helpful to prevent self-ignition phenomenon.

Development of Tank Inspection Technique for Monitoring Accumulated Damage of Hydrogen Tank

Kyungh-whan Kim･Jung-ryul Lee (KAIST)･Yong-joo Cho (Hyundai Motor)

As the number of FCEV vehicles increases, hydrogen tanks are exposed to deterioration in use, and collision accidents, etc. To ensure the safe use of hydrogen tank, it is necessary to monitor the condition of the hydrogen tank to check its safety. In this study, we propose a method to measure the crack density of hydrogen tanks in real-time during operation by comparing the crack density, and the attenuation ratio of ultrasonic signal propagation. It is caused by repeated use of hydrogen tanks. Using a PZT Active Sensing network can monitor the structural status of hydrogen tank.