Rechargeable power supply system and method of protection against abnormal charging
First Claim
1. A power supply system with a battery for supplying power to a main system, comprising:
- a charging current measuring unit for measuring charging current for said battery;
a battery capacity calculating unit for calculating battery capacity of said battery;
and a detecting unit for detecting malfunction occurring in said battery based on a charging current value obtained by said charging current measuring unit and said battery capacity calculated by said battery capacity calculating unit.
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Accused Products
Abstract
An intelligent battery comprising a battery cell for charging and discharging; a voltage detection circuit for detecting voltage of the battery cell; a current detection circuit for detecting charging current; a charging-stop FET for stopping charging for the battery cell; and a CPU for activating the charging-stop FET based on voltage detected by the voltage detection circuit, wherein before the voltage reaches a voltage for activation of the charging-stop FET, when the charging current value detected for the battery capacity by the current detection circuit is larger than a reference, the CPU determines that an abnormal state occurs, and activates the charging-stop FET. The present invention provides, in part, a battery, which is safer even if dual accidental malfunctions occur.
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Citations
19 Claims
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1. A power supply system with a battery for supplying power to a main system, comprising:
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a charging current measuring unit for measuring charging current for said battery;
a battery capacity calculating unit for calculating battery capacity of said battery;
and a detecting unit for detecting malfunction occurring in said battery based on a charging current value obtained by said charging current measuring unit and said battery capacity calculated by said battery capacity calculating unit. - View Dependent Claims (2, 3)
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4. A computer device, comprising:
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a main system for data processing; and
an intelligent battery for supplying power to said main system, wherein said intelligent battery comprises;
a battery cell for charging and discharging, a current detection circuit for detecting charging current for said battery cell; and
a CPU for calculating battery capacity by integrating charging current detected by said current detection circuit, and recognizing malfunction occurring in the battery based on charging current value detected by the current detection circuit and the calculated battery capacity. - View Dependent Claims (5)
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6. A battery for supplying power to an electric apparatus, comprising:
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a charging current measuring unit for measuring charging current for a battery cell;
a battery capacity integration unit for integrating battery capacity for said battery cell; and
a malfunction detecting unit for detecting malfunction occurrence based on a charging current value measured by said charging current measuring unit and battery capacity integrated by said battery capacity integration unit.- View Dependent Claims (7, 8)
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9. A battery, comprising:
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a battery cell;
a voltage detection circuit for detecting voltage for said battery cell;
a current detection circuit for detecting charging current for said battery cell;
a charging stop unit for stopping charging for said battery cell; and
a control unit for activating said charging stop unit based on voltage detected by said voltage detection circuit, wherein before the voltage reaches a voltage for activating said charging stop unit, said control unit detects a malfunction state based on a charging current value detected by said current detection circuit, and activates the charging stop unit. - View Dependent Claims (10, 11)
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12. A method for protecting a battery from abnormal charging, comprising:
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measuring a charging current value for said battery;
calculating integrated capacity for said battery; and
activating a protection facility when the charging current value measured for the calculated integrated capacity is larger than a predetermined value. - View Dependent Claims (13, 14)
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15. A method for protecting an intelligent battery with a microcomputer from abnormal charging, comprising:
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recognizing that said intelligent battery is connected to an apparatus with a charger for constant-current/constant-voltage charging;
measuring charging current value when said intelligent battery is charged while switching from constant-current charging to constant-voltage charging;
determining based on the measured charging current value whether abnormal charging occurs or not; and
aborting charging when it is determined that abnormal charging occurs. - View Dependent Claims (16, 17)
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18. A program of software-based code for enabling a microcomputer contained in a battery to perform:
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a charging function for measuring charging current value for said battery;
a calculating function for calculating integrated capacity in said battery; and
a protecting function for activating a protection facility when the charging current value measured for the calculated integrated capacity is larger than a predetermined value.
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19. A program for enabling a microcomputer contained in a battery to perform:
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a function for recognizing that said battery is connected to an apparatus with a charger for constant-current/constant-voltage charging;
a function for measuring charging current value when said battery is charged while switching from constant-current charging to constant-voltage charging;
a function for determining based on the measured charging current value whether abnormal charging occurs or not; and
a function for aborting charging when it is determined that abnormal charging occurs.
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Specification