Full-charge detecting method and charging device for a secondary battery
First Claim
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1. In a method of charging a secondary battery comprising:
- detecting when a charge current decreases below a current level that is able to be integrated, interrupting a charging operation in response to the detection of the charge current decreasing below said current level that is able to be integrated until, a charge current which is able to be integrated flows.
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Abstract
A method of detecting the full-condition of a secondary battery of the present invention integrates the amount of charge current with a microcomputer in an environment of the kind causing a charge current to vary. When the charge current falls, the method interrupts a charging operation until an adequate charge current flows. A charging device for practicing the above method is also disclosed.
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Citations
7 Claims
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1. In a method of charging a secondary battery comprising:
detecting when a charge current decreases below a current level that is able to be integrated, interrupting a charging operation in response to the detection of the charge current decreasing below said current level that is able to be integrated until, a charge current which is able to be integrated flows.
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2. In a method of detecting a full-charge condition of a secondary battery by integrating an amount of charge current, comprising:
interrupting a charging operation when the charge current falls below a current level which is able to be integrated until a charge current that is able to be integrated flows.
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3. In a method of detecting a full-charge condition of a secondary battery by integrating an amount of charge current with a microcomputer, said method comprising the steps of:
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using said microcomputer to set a minimum charge current which is able to be integrated; interrupting a charging operation when said microcomputer detects that the charge current is smaller than said minimum charge current; resuming the charging operation after a preselected period of time; and repeating said detection, said interruption, and said resumption of the charging operation until the secondary battery has been fully charged.
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4. In a charging device for detecting a full-charge condition of a secondary battery by integrating an amount of charge current comprising:
a current interrupter interrupting a charging operation when the charge current falls below a current level which is able to be integrated, until a charge current that is able to be integrated flows. - View Dependent Claims (5)
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6. In a charging device for detecting a full-charge condition of a secondary battery by integrating an amount of charge current with comprising:
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a microcomputer having leads connected to a resistor, said microcomputer programmed to detect said amount of charge current through said resistor; a switch for selectively turning on or turning off the charge current being fed from a charge power feeding device; said microcomputer having stored therein a value of a minimum charge current that is able to be integrated for turning off said switch, when a value of the charge current being sensed by said resistor is below said value of said minimum charge current, and again turning on said switch after an elapse of a preselected period of time. - View Dependent Claims (7)
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Specification