Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2005-01-11
2005-01-11
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C702S057000
Reexamination Certificate
active
06842708
ABSTRACT:
A method and apparatus in accordance with the present invention determines the life of a battery which is repeatedly charged and discharged while providing power to one or more electronic devices. The battery is provided with a circuit for measuring current while the battery is charged, another circuit for stopping the charging of the battery, a circuit for measuring the voltage of the battery while charged and while charging is stopped. A CPU is included for computing an internal impedance depending on the measured battery voltage, the current under charge and the battery voltage while charging is stopped. An embedded controller is also included for determining the life of the battery depending upon the information about the internal impedance calculated by the CPU. Finally, information about the battery life can be displayed or delivered to a user at a predetermined time or continuously during use.
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JP9000466, Japanese Search Report.
Barlow John
International Business Machines - Corporation
Reid Scott W.
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