Patent JPS5582028A successfully refreshed from Google Patents.
Patent EP0248461A1 successfully refreshed from Google Patents.
EP0248461A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Device for indicating the charge status of a battery
Assignee: Koninklijke Philips NV
•
Filing: 1987-05-11
•
Granted: —
•
Expires: 2007-05-11
Abstract
Abstract For determining the charge status of a battery (4) when it is discharged by a load (X L ) and/or when it is charged by a power-supply circuit (1) a value representing the nominal charging time and discharging time respectively and stored in first (10) and second adjusting means (11) respectively is applied to computing means (12). On the basis of clock pulses applied to the computing means (12) by the clock means (13) the computing means calculate the charge status of the bat, tery by expressing the elapsed discharging or charging time as a fraction of the adjusted discharging time and charging time respectively, which computed charge status is indicated by indicator means (14). During discharging and charging an actual charge status is detected by first (7) and second (16) detection means. In the case of a difference between the computed and the actual charge status correction means (15) correct the computed charge status and the value stored in the adjusting means (10, 11) is updated, so that during a subsequent discharging a charging cycle the computed charge status is better in conformity with the actual charge status.
Inventors
- 👤 Johannes Ijntema
- 👤 Jouw Van Den Akker
- 👤 Jacob Frederik Verrij
- 👤 Lambert Johan Hendrik Folmer
- 👤 Teruo Hishiki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 11:54
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/94; H02J7/947; G; G01; G01R; G01R31/00; G01R31/36; G01R31/3644; G01R31/3648; Y; Y10; Y10S; Y10S320/00; Y10S320/18; Y10S320/21
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
282 words
A device for indicating the charge status of a battery during charging and/or discharging, comprising: - a power-supply circuit for charging the battery and/or energizing a load; - means of generating pulses during charging and/or discharging of the battery; - computing means for computing the charge status on the basis of the generated pulses, and - indicator means for indicating the computed charge status, characterized in that - the means for generating pulses comprise clock means for generating clock pulses, - the computing means comprise: - first adjusting means for adjusting a discharging time of the battery to a first value during discharging of the battery by the load an4br second adjusting means for adjusting a charging time of the battery'to a second value during charging of the battery by the power-supply cir -cuit under no-load condition, and - time-measuring means for determining, on the basis of the generated clock pulses, the ratio between the elapsed discharging time and the adjusted discharging time and in determining the ratio between the elapsed charging time and the adjusted charging time, which ratios represent the calculated charge status, - and in that the device further comprises: - detection means for detecting at least one actual charge status of the battery during discharging and/or charging of the battery, - correction means for correcting the computed charge status and for correcting the first value of the first adjusting means and/or the second value of the second adjusting means when a difference occurs between said at least one actual charge status detected by the detection means and the computed charge status at the instant of detection, and - control means for controlling the adjustng means and time-measuring means.
Claim 2
Independent Claim
282 words
A device for indicating the charge status of a battery during charging and/or discharging, comprising: - a power-supply circuit for charging the battery and/or energizing a load; - means of generating pulses during charging and/or discharging of the battery; - computing means for computing the charge status on the basis of the generated pulses, and - indicator means for indicating the computed charge status, characterized in that - the means for generating pulses comprise clock means for generating clock pulses, - the computing means comprise: - first adjusting means for adjusting a discharging time of the battery to a first value during discharging of the battery by the load an4br second adjusting means for adjusting a charging time of the battery'to a second value during charging of the battery by the power-supply cir -cuit under no-load condition, and - time-measuring means for determining, on the basis of the generated clock pulses, the ratio between the elapsed discharging time and the adjusted discharging time and in determining the ratio between the elapsed charging time and the adjusted charging time, which ratios represent the calculated charge status, - and in that the device further comprises: - detection means for detecting at least one actual charge status of the battery during discharging and/or charging of the battery, - correction means for correcting the computed charge status and for correcting the first value of the first adjusting means and/or the second value of the second adjusting means when a difference occurs between said at least one actual charge status detected by the detection means and the computed charge status at the instant of detection, and - control means for controlling the adjustng means and time-measuring means.
Claim 3
Dependent Claim
44 words
A device as claimed in Claim 1, characterized in that the detection means for detecting said at least one actual charge status during discharging of the battery comprise a first detection device for detecting a decrease of the battery voltage below a reference voltage.
Claim 4
Dependent Claim
42 words
A device as claimed in Claim 1, characterized in that the detection means for detecting said at least one actual charge status during charging of the battery comprise a second detection device for detecting the substantially fully charged condition of the battery.
Claim 5
Dependent Claim
34 words
A device as claimed in Claim 3, characterized in that the second detection device comprises a device for detecting a battery-voltage decrease which occurs when the battery is in the substantially fully charged condition.
Claim 6
Dependent Claim
29 words
A device as claimed in Claim 3, characterized in that the second detectbn device comprises a device for detecting whether the battery voltage is equal to a reference voltage.
Claim 7
Independent Claim
47 words
A device as claimed in any one of the preceding Claims, characterized in that the computing means further comprises third adjusting means for adjusting a charging time of the battery to a third value during charging of the battery by the power-supply circuit in its loaded condition.
Claim 8
Independent Claim
58 words
A device as claimed in any one of the preceding Claims, characterized in that the computing means further comprises fourth adjusting means for adjusting a charging time of the battery to a fourth value during charging of the battery by the power-supply circuit in the no-load condition and when the battery is in the substantially fully charged condition.
Claim 9
Independent Claim
49 words
A device as claimed in any one of the preceding Claims, characterized in that the computing means further comprise fifth adjusting means for adjusting a discharging time of the battery to a fifth value during discharging of the battery when the power supply circuit and the load are inoperative.
Claim 10
Independent Claim
96 words
A device as claimed in any one of the preceding Claims, characterized in that the power-supply circuit is adapted to supply,a charging current to the battery for a fraction of the charging time, which charging current is larger than the charging current during the remainder of the charging time of the battery, and in that the computing means further comprise sixth adjusting means for adjuting a charging time of the battery to a sixth value during charging of the battery with an increased charging current when the load is inoperative and the battery is substantially empty.
Claim 11
Independent Claim
101 words
A device as claimed in any one of the preceding Claims, characterized - in that each of the adjusting means comprises a memory device for storing the adjusted value of the relevant adjusting means, - in that the time-measuring means comprise: - an adjustable frequency divider for dividing the frequency of the clock pulses from the clock means depending on the value stored in the relevant adjusting means, and - a memory device having a fixed number of storage locations for the storage of the number of clock pulses supplied by the frequency divider, which number represents the computed charge status.
Claim 12
Dependent Claim
119 words
A device as claimed in Claim 10 when appendant to any one of the Claims 6 to 9, characterized - in that the first adjusting means comprise a first memory device for the storage of a first value, which represents the discharging time of the battery when discharged by the load, - in that the second adjusting means comprise a second memory device for the storage of the second value, which represents the charging time of the battery by the power-supply circuit, and - in that each of the other adjusting means comprises a memory device common to the first or second adjusting means, and means for connecting a fixed frequency divider in series with the programmable frequency divider.
Claim 13
Independent Claim
80 words
A device as claimed in any one of the Claims 1 to 9, characterized - in that each of the adjusting means comprises a memory device for storing the adjusted value of the relevant adjusting means, - in that the time-measuring means comprise: - a memory device whose number of storage locations is proportioned to the value stored in the relevant adjusting means, and - a frequency divider for divideing the frequency of the clock pulses by a fixed number.
Claim 14
Dependent Claim
89 words
A device as claimed in Claim 12, when appendant to any one of the Claims 6 to 8, characterized - in that the first adjusting means comprise a memory device for storing the first value, - in that the second adjusting means comprise a memory device for storing the second value, and - in that each of the other adjusting means comprises a memory device common to the first or the second adjusting means for connecting a second fixed frequency divider in series with the said fixed frequency divider.
Claim 15
Independent Claim
23 words
A device as claimed in any one of the preceding Claims, characterized in that the indicator means comprise a passive electro-optical display means.
Claim 16
Dependent Claim
18 words
A device as claimed in Claim 14, characterized in that the indicator means comprise a liquid-crystal display means.
Claim 17
Independent Claim
22 words
A device as claimed in any one of the preceding Claims, characterized in that the indicator means comprise an electro-acoustic indicator means.
Claim 18
Dependent Claim
36 words
17 . A device as claimed in any one of the preceding Claims, characterized in that the indicator means comprise means for indicating the charge status of the battery after the device has been switched off.
Claim 19
Dependent Claim
19 words
A dry-shaving apparatus, characterized in that it comprises a device as claimed in any one of the preceding Claims.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.