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Method of transmitting and receiving signal indicative of remaining capacity of storage battery for propelling electric vehicle

  • US 5,739,674 A
  • Filed: 10/15/1996
  • Issued: 04/14/1998
  • Est. Priority Date: 10/16/1995
  • Status: Expired due to Fees
First Claim
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1. A method of transmitting and receiving a signal indicative of the remaining capacity of a storage battery for propelling an electric vehicle, comprising the steps of:

  • transmitting a display request signal for displaying the remaining capacity of the storage battery from a portable control unit which has a plurality of indicator lamps corresponding to respective ranges of a rated capacity of the storage battery, to a communication unit on the electric vehicle;

    receiving the display request signal with the communication unit;

    determining one of said ranges to which the remaining capacity of the storage battery belongs, with the communication unit;

    transmitting a remaining capacity display signal representing the determined range from the communication unit to the portable control unit;

    receiving the remaining capacity display signal with the portable control unit;

    determining whether the signal received by said portable control unit is normal or not; and

    turning on one of the indicator lamps which corresponds to the range to which the remaining capacity of the storage battery belongs, based on the received remaining capacity display signal if the received signal is normal, and blinking a predetermined indicator map if the received signal is not normal.

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