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Residual capacity displaying device

  • US 5,406,266 A
  • Filed: 07/01/1994
  • Issued: 04/11/1995
  • Est. Priority Date: 08/06/1991
  • Status: Expired due to Term
First Claim
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1. A display apparatus for indicating deterioration of a battery, comprising:

  • current detection means for detecting a current flowing to and from the battery;

    deterioration detection means for detecting a deterioration of the battery including;

    storing means for storing a predetermined capacity of the battery;

    determining means for determining a recharged capacity of the battery from the current flowing over a period of time;

    voltage detection means for detecting a voltage of the battery being less than a predetermined voltage;

    calculation means for calculating a difference between the predetermined capacity and the recharged capacity of the battery in response to the voltage detection means; and

    judging means for judging whether a difference between the predetermined capacity and the recharged capacity of the battery exceeds a predetermined value; and

    display means for displaying a first notification when the difference exceeds the predetermined value, indicating battery deterioration, and a second notification, indicating that the battery should be recharged, when the difference does not exceed the predetermined value.

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