Patent US4746193A successfully refreshed from Google Patents.
Patent US6100669A successfully refreshed from Google Patents.
US6100669A
Expired / Lapsed
US
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Full-charge detecting method and charging device for a secondary battery
Assignee: HTC Corp
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Filing: 1999-01-12
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Granted: 2000-08-08
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Expires: 2019-01-12
Abstract
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.
Inventors
- 👤 Yoshitaka Tokita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:56
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/94
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
60 words
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.
Claim 2
Dependent Claim
60 words
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.
Claim 3
Dependent Claim
50 words
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.
Claim 4
Dependent Claim
50 words
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.
Claim 5
Dependent Claim
93 words
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: 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.
Claim 6
Dependent Claim
93 words
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: 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.
Claim 7
Dependent Claim
54 words
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.
Claim 8
Dependent Claim
54 words
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.
Claim 9
Dependent Claim
19 words
A charging device as claimed in claim 4, wherein said charging device is applied to a handy electronic apparatus.
Claim 10
Dependent Claim
122 words
In a charging device for detecting a full-charge condition of a secondary battery by integrating an amount of charge current with comprising: 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.
Claim 11
Dependent Claim
122 words
In a charging device for detecting a full-charge condition of a secondary battery by integrating an amount of charge current with comprising: 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.
Claim 12
Dependent Claim
19 words
A charging device as claimed in claim 6, wherein said charging device is applied to a handy electronic apparatus.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-08-08 | 2004-02-07 | 2004-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-08-08 | 2008-02-07 | 2008-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-08-08 | 2012-02-07 | 2012-08-08 | $7700.00 | Window Closed / Lapsed |