Battery system providing indicia of a charging parameter

  • US 6,075,339 A
  • Filed: 04/21/1997
  • Issued: 06/13/2000
  • Est. Priority Date: 08/16/1993
  • Status: Expired due to Fees
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First Claim
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1. A battery system comprising:

  • a. a rechargeable battery;

    b. a memory that stores a reference value; and

    c. a circuit that performs a charging process comprising;

    supplying a charging current to the battery;

    monitoring a rate of change of battery temperature during the step of supplying the charging current to the battery to provide a measured value;

    comparing the measured value with the reference value;

    determining a remining period of charging time when the measured value fulfills a predetermined condition with respect to the reference value; and

    terminating the charging process when the remaining period of charging time has lapsed.

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