Toyota EV-50: an effort to realize practical EV's

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Toyota EV-50: an effort to realize practical EV's

Fujii, Y. / Kanamaru, K. / Shoji, Y.

At the 1993 Tokyo Motor Show, Toyota Motor Corporation presented the EV-50. This electric vehicle was designed for practical use in both city and highway traffic with low energy consumption and high reliability. This paper outlines the design concepts of the vehicle systems, these systems were designed to minimize energy consumption and maximize battery life. To achieve adequate vehicle range and battery life, it is important that sealed lead-acid batteries have high power density and high energy density characteristics. The light and efficient power train was developed by employing coaxial type configuration. The system was enhanced further by replacing the induction motor with a permanent magnet motor. The regenerative brake system used on the EV-50 increases the vehicle's city driving range by more than 20 %. As a result of these improvements, the authors have succeeded in achieving a good driving range for the EV-50. Ni-MH batteries of EV-50 which are under testing and just began to be evaluated on board have shown the ability to extend the vehicle range by about 1.7 times. The latest results of road tests on the battery, energy consumption, regeneration effect and the practical vehicle range are also discussed.