This is a report on the development of a nickel-metal hydride (Ni-MH) battery for smaller electric vehicles developed as near-future urban commuter vehicles. The goals in the development of this battery were compactness and high performance. This performance was achieved through the development of a medium-capacity 50 Ah-class battery. Especially in field tests, uneven battery temperature has created capacity imbalances among batteries in a module, which was a major cause of battery deterioration. To solve this problem the authors developed a new technology to improve the high-temperature characteristics of batteries used in EVs, which brought about improvements to this battery pack, that raised charging efficiency under high-temperature conditions, i.e., the available capacity to 90 % at 60 deg C compared with 100 % at 25 deg C , thereby making it possible to mitigate the capacity disparities among modular batteries. Additionally, mitigating the capacity disparities due to temperature differences among batteries limited the deterioration of battery packs used in vehicles and made it possible to maintain long-term high performance.


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    Title :

    Development of a high performance Ni-MH battery for smaller electric vehicles


    Additional title:

    Entwicklung von Ni-MH-Hochleistungsbatterien für kleinere Elektrofahrzeuge


    Contributors:
    Kobayashi, A. (author) / Kishimoto, T. (author) / Hino, Y. (author) / Oshitani, M. (author) / Okamoto, K. (author) / Yagi, K. (author) / Ishikura, T. (author) / Sato, N. (author)


    Publication date :

    2000


    Size :

    10 Seiten, 11 Bilder, 1 Tabelle, 5 Quellen


    Remarks:

    (nicht paginiert)


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English






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