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The mystery S140V Atrai EV from 1998

Discussion in 'Daihatsu Hi jet' started by maboyce, Jan 14, 2025.

  1. maboyce

    maboyce Active Member

    A while back I noticed that the online parts catalogue had an entry for an 'electric vehicle drive unit'. I never looked into it until yesterday, when instead of searching by my truck's chassis number, I took a look at the list of variants and found this:
    Atrai EV model info.png

    It seems to have been a 1998 model only. I'm curious if anyone else has ever heard anything about this? Google results are swamped with the modern Hijet EV. The only contemporary reference I could find was this press release. They expected to sell '100 per year' at an MSRP of 2,850,000 yen.

    To make 240 V each of the 20 modules would be a 12 V sealed lead acid golf cart battery, for a total of 60 Ah (14.4 kWh in modern terms). 115 km range, 7 hours to a full charge.

    The battery powers a 35 kW permanent magnet synchronous motor though an 'IGBT inverter' at speeds up to 100 km/h. According to the parts catalogue the motor would mount up to the standard manual transmission.

    The next year the new S2xx model got its own EV version with the same specs.

    I'm curious where the battery box(es) actually went - it kind of looks like they just sat on the floor of the cargo compartment, since the ICE transmission, driveline, and rear axle were all still present.

    (54: battery module, 56: battery exhaust filter, 58: exhaust hose set, 57: battery filter bracket)
    Atrai EV battery box layout - photo.jpg
    Atrai EV drive motor and flexplate - photo.jpg

    Battery box framing:
    (64: front battery case cover, 66: rear battery case cover, 71: battery box pads, 68: battery tray packing)
    Atrai EV battery box framing - photo.jpg

    Battery cooling fan:
    Atrai EV battery cooling fan - photo.jpg

    Instrument cluster with 'Electric Vehicle' charge indicator:
    Atrai EV instrument cluster - photo.jpg

    Charging system:
    (11: OBC, 21: drive inverter, 14: (DC/DC?) converter assembly, 19: circuit breaker, 12 & 13: charger plug and socket
    Atrai EV charger - photo.jpg

    Last but not least, the throttle encoder to turn the tension on the standard accelerator cable into a control signal:
    Atrai EV - accelerator encoder - photo.jpg
     

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