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Remaining capacity meter and detection method for electric vehicle battery

  • US 5,561,362 A
  • Filed: 11/02/1994
  • Issued: 10/01/1996
  • Est. Priority Date: 11/04/1993
  • Status: Expired due to Term
First Claim
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1. A remaining capacity meter for an electric vehicle battery, said meter being suited for use in the detection of a remaining capacity of the electric vehicle battery, comprising:

  • full charge detection means for detecting whether said battery has been brought into a fully-charged state;

    remaining capacity setting means for setting, as a full-charge-time capacity, the remaining capacity of said battery at the time of detection of the fully-charged state by the full charge detection means;

    discharge/charge-based correction means for correcting the remaining capacity, which has been set by said remaining capacity setting means, while integrating, with respect to time, a current discharged from or charged into said battery; and

    deterioration-based correction means for correcting the fully-charged capacity, which has been set by said remaining capacity setting means, by a deterioration-based correction quantity corresponding to the number of chargings and battery temperatures at the time of the respective chargings.

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