Faculty Profiles - HIRAYAMA Satoshi

Papers - HIRAYAMA Satoshi

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Maze-solving in a plasma system based on functional analogies to reinforcement-learning model Reviewed

O. Sakai, T. Karasaki, T. Ito, T. Murakami, M. Tanaka, M. Kambara, S. Hirayama

PLOS ONE 19 ( 4 ) 2024.3

Investigation of Time Domain Measurement of Electrochemical Impedance Spectrum in Low Frequency Range for Lithium-Ion Batteries Using Preset Equivalent Circuit Model Reviewed

950 2023.10

Elementary Process Analysis of Charge Transfer Processes of Lithium-Ion Batteries Through Distribution of Relaxation Times Method

S. Tomita, D. Kawaguchi, S. Hirayama, Y. Inui

Proceedings of the International Council on Electrical Engineering Conference 2023.7

Comparison of Temperature Dependence of Electrochemical Impedance for Lithium-Ion Batteries with Different Cathode Materials International journal

D. Kawaguchi, S. Tomita, S. Hirayama, Y. Inui

Proceedings of the International Council on Electrical Engineering Conference 2022 2022.7

Temperature dependence of impedance spectrum of charge-transfer processes in lithium-ion batteries with nickel-manganese-cobalt cathode and graphite anode Reviewed International journal

Inui Y., Hirayama S., Tanaka T.

Journal of Energy Storage 44 2021.12

Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Energy Storage Participation form：Joint(The vice charge)

The temperature dependence of the impedance spectrum of charge-transfer processes in lithium-ion batteries with nickel-manganese-cobalt cathode and graphite anode within a range of 10 to 40 °C was investigated. The authors prepared eight test batteries by degrading two kinds of lithium-ion batteries having different manufacturer models through different degradation processes. Their impedance spectra were measured under various temperature and state of charge conditions. A corresponding equivalent circuit model was introduced and the values of its circuit constants were identified for all of the measured impedance spectrum data through fitting calculations. The authors then quantitatively evaluated the temperature dependence of all of the identified circuit constants. The Arrhenius type temperature dependence was confirmed for each charge-transfer resistance. Whereas, it was revealed that the temperature dependence of all other circuit constants is negligible. Using the obtained evaluation results, the authors proposed a novel method to estimate the impedance spectrum of charge-transfer processes under any battery temperature condition within a range of several degrees to several tens of degrees Celsius from spectrum data measured under a freely selected battery temperature condition within this range. The validity of the proposed method for its practical use was confirmed through comparison between estimated and measured results.

DOI： 10.1016/j.est.2021.103390

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85122797922&origin=inward

Detailed estimation method of heat generation during charge/discharge in lithium-ion battery using equivalent circuit Reviewed

Inui Y., Hirayama S., Tanaka T.

Electronics and Communications in Japan 102 ( 12 ) 3 - 14 2019.12

Language：English Publishing type：Research paper (scientific journal) Publisher：Electronics and Communications in Japan

© 2019 Wiley Periodicals, Inc. Lithium-ion batteries are becoming practically used for high power applications such as electric vehicles. For this purpose, some estimation technique of battery heat generation is inevitable. The authors, therefore, have already proposed a simple estimation method of the heat generation in lithium-ion batteries during their charge/discharge using internal equivalent resistance and confirmed validity of the method for constant current discharge patterns. The merit of this method is its simplicity but it has already been made clear that its versatility for various current patterns is not enough. Considering these facts, in this study, the authors newly proposed a detailed estimation method of the heat generation in lithium-ion batteries during their charge/discharge using equivalent circuit. The authors compared the estimation results of the heat generation in lithium-ion battery for various constant or pulse current charge/discharge patterns through the newly proposed detailed estimation method with the estimation results through the conventional simple estimation method and measured results through a calorimeter for the corresponding current patterns. The versatility of the newly proposed detailed estimation method was successfully confirmed through these comparisons, indicating the validity and necessity of the proposed method.

DOI： 10.1002/ecj.12221

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85076130872&origin=inward

Study on Temperature Dependence of Charge Transfer Impedances of Lithium-Ion Batteries International journal

A. Tsuji, D. Nakamura, S. Hirayama, T. Tanaka, Y. Inui

Proceedings of the International Council on Electrical Engineering Conference 2019 2019.6

Evaluation Method on Temperature Rise of Lithium-Ion Battery During Charge and Discharge Cycles International journal

N. Fujimoto, S. Hirayama, Y. Inui

Proceedings of the International Council on Electrical Engineering Conference 2019 2019.6

Numerical Analysis of Unsteady Arc Plasma Behavior in Low Voltage Circuit Breaker International journal

S. Hirayama, Y. Kanai, Y. Inui, H. Kato

Proceedings of the International Council on Electrical Engineering Conference 2019 2019.6

Influence of Externally Applied Magnetic Field on Arc Plasmas in a Passive Resonance Direct Current Circuit Breaker Reviewed International journal

Satoshi Hirayama, Yoshitaka Inui

Proceedings of international conference on Electrical engineering 2018.6

Magnetohydrodynamic Simulation of Arc-circuit Instability in a High Voltage Direct Current Circuit Breaker

S. Hirayama, H. Sato, Y. Inui

IEEJ Proceedings of the 10th International Workshop on High Voltage Engineering 2016.11

Numerical Study of Arc in SF₆ Gas Circuit Breaker with Externally Applied Magnetic Field Reviewed

S.Hirayama, T.Fujino, M.Ishikawa, T.Mori, H.Kawano

IEEJ Transactions on Electrical and Electronic Engineering 11 ( 4 ) 2016.7

Numerical Simulation of Rotary Arc Plasma in a Laval Nozzle International journal

S. Hirayama, Y. INUI

International Conference on Electrical Engineering 2016 2016.7

CO2 Arc Behavior During Current Interruption Process in a Gas Circuit Breaker with Externally Applied Magnetic Field International journal

T. Takematsu, S. Hirayama, T. Fujino, M. Ishikawa, S. Ogawa, and T. Mori

20th International Conference on Gas Discharges and Their Applications 2014

印加磁界環境下でのCO₂アークとSF₆アークの比較 Reviewed

平山智士，木内健人，藤野貴康，石川本雄，森　正，岩本勝治，河野広道

電気学会論文誌B 133 ( 11 ) 843 - 850 2013.11

Three-dimensional numerical analysis of rotary arc plasma during current interruption process International journal

S. Hirayama, T. Fujino, M. Ishikawa, T. Mori, K. Iwamoto, H. Kawano

XIX International Conference on Gas Discharges and Their Applications 186 - 189 2012.9

外部印加磁場中におけるSF₆アークプラズマの三次元非定常数値解析 Reviewed

平山智士，藤野貴康，石川本雄，森　正，岩本勝治，河野広道

電気学会論文誌B 131 ( 10 ) 865 - 871 2011.10

Time-dependent magnetohydrodynamic simulation of SF₆ rotary-arc plasma with consideration of electromotive force International journal

S. Hirayama, T. Fujino, M. Ishikawa, T. Mori, K. Iwamoto, H. Kawano

42nd AIAA Plasmadynamics and Lasers Conference in conjunction with the 18th International Conference on MHD Energy Conversion 2011.6

Influence of magnetic field on SF₆ arc plasma International journal

S. Hirayama, T. Fujino, M. Ishikawa, T. Mori, K. Iwamoto, H. Kawano

16th International Conference on Electrical Engineering 2010.7

Numerical simulation of unsteady behavior of rotary arc plasma under magnetic field International journal

T. Fujino, S. Hirayama, M. Ishikawa, T. Mori, K. Iwamoto, H. Kawano

41st AIAA Plasmadynamics and Lasers Conference 2010.6

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Papers - HIRAYAMA Satoshi