To promote widespread use of fuel cell vehicles (FCVs), further improvement of cold start capability is required for operation in various extreme temperature regions all over the world. Sub-freezing, cold start issues of fuel cells must be resolved through gaining a better understanding of the physical phenomena taking place in a cell during cold start and by elucidating the mechanisms hindering cold startup. Nissan has improved its understanding of the physical phenomena occurring in a fuel cell (FC) during cold startup by a laboratory-scale FC experiment at subfreezing temperatures and a numerical calculation that expresses various transport processes in a fuel cell, including those of the reactant gases, water, electrons and heat. The results have identified several necessary conditions for mass transport in a cell during cold startup and the factors that limit and govern the phenomena involved. For example, the ice formation rate in the cathode catalyst layer, which has a pronounced effect on cold start performance, is substantially influenced by the product water uptake potential and uptake rate of the polymer membrane. It has also been found that the ice formation rate varies significantly depending on the physical properties and initial water content of the membrane, load, temperature and other factors. These findings have been used to improve fuel cell materials and to develop a new 2008 model FC stack that possesses ample cold start capability without having any negative impact on other performance attributes such as durability. Test results obtained with an improved X-TRAIL FCV equipped with this new stack have verified its cold start capability from -20 deg C and driving performance under subfreezing conditions at the Hokkaido Proving Grounds in Japan. Finally, this paper also touches on some issues that will arise in the future in connection with demands for lower cost FCVs and mentions possible approaches to resolving them.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Development of an FCV with a new FC stack for improved cold start capability


    Weitere Titelangaben:

    Entwicklung eines Brennstoffzellenfahrzeugs mit einem neuen Brennstoffzellenstapel mit verbesserten Kaltstarteigenschaften


    Beteiligte:
    Ikezoe, Keigo (Autor:in) / Tabuchi, Yuichiro (Autor:in) / Kagami, Fumio (Autor:in) / Nishimura, Hidetaka (Autor:in)


    Erscheinungsdatum :

    2010


    Format / Umfang :

    12 Seiten, 18 Bilder, 15 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Development of an FCV with a New FC Stack for Improved Cold Start Capability

    Kagami, Fumio / Nishimura, Hidetaka / Ikezoe, Keigo et al. | SAE Technical Papers | 2010


    2010-01-1093 Development of an FCV with a New FC Stack for Improved Cold Start Capability

    Ikezoe, K. / Tabuchi, Y. / Kagami, F. et al. | British Library Conference Proceedings | 2010


    Cold start system and low-temperature cold start control method for hydrogen fuel cell stack

    PAN XINGLONG / LI JINCHENG / HAN LINGHAI et al. | Europäisches Patentamt | 2022

    Freier Zugriff

    Improved start quality from revised cold start calibration methods

    Isaacs,R. / Eade,D. / Shayler,P.J. et al. | Kraftfahrwesen | 1991


    Investigation on Cold Start for Proton Exchange Membrane Fuel Cell Stack

    Fu, Jiaxing / Xu, Sichuan / Liu, Xingyu | SAE Technical Papers | 2021