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.
Development of a high performance Ni-MH battery for smaller electric vehicles
Entwicklung von Ni-MH-Hochleistungsbatterien für kleinere Elektrofahrzeuge
2000
10 Seiten, 11 Bilder, 1 Tabelle, 5 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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