Industrial Technology Research Institute (ITRI) has developed three generations of the two-wheelers electric scooters (ES) by implementing valve-regulated-lead-acid (VRLA), nickel-metal-hydride (Ni), and lithium-ion batteries respectively. These three generations of the ES have been adopted by the Taiwanese electric vehicle industry, and the GEN I ES have been produced since September 1999. The GEN III lithium-ion model will be launched by 2003. Further to enhance the commercial competitiveness, ITRI is developing a modular propulsion system to expand the vehicle application from the ES segmentation to the four-wheelers low speed vehicle (LSV). The scope of the work includes developing the modular motor, control, battery-management system, charger, transmission, and lithium-ion battery integration. And this application ranges from 3kW to 6kW of the powers, 2 kWh to 6 kWh of the energy capacity, and 95 kg to 350 kg of the vehicle curb weights. The engineering targets of the modular propulsion systems are to maximize the common key components, tooling, and facilities to reduce the major investment and the vehicle variable cost. From the preliminary analysis, the cost of the intent system can be lowered by at least 20%, and the vehicle performance will be much closer to the customer expectation than the current VRLA vehicles. By taking the ITRI GEN III ES as the baseline model, we optimize a DC brush-less motor and controls to operate at 90% peak efficiency and coupled with the transmission to meet the cycle duty requirements. The lithium ion battery equipped with the equalization and safety protection functions to secure the battery modular operation, and it can be applied from 43.2V, 86.4, to 129.6V systems with 2kWh, 4kWh to 6kWh of the energy-capacity configurations. A timing belt transmission delivers 10 Newton-meter of the torque for the 95 kg ES, and it can be expanded to 30 Newton-meter for the 350 kg LSV. The charger has optimized with the battery characteristics and the charging time requirement to range from the 400 W, 600 W, to 900 W of the output powers. Finally, the bench-test of the baseline vehicle, ES, will be presented here. And the performance of the derivative vehicles, LSV, will be shown from the simulation results.


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    Title :

    The development of the modular propulsion system for the light-vehicle applications


    Additional title:

    Entwicklung eines modularen Antriebssystems für leichte Fahrzeuge


    Contributors:
    Shu, J.P.H. (author) / Wu, Chien-Tsung (author) / Chi Tang Hsu (author) / Chin Tai Wu (author) / Lo, Shi-Ming (author) / Lo, Chih-Chung (author)


    Publication date :

    2001


    Size :

    10 Seiten, 7 Bilder, 4 Tabellen, 14 Quellen


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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