US5487956A
Expired / Lapsed
US
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Adaptive backup battery management for vehicular based electronic modules
Assignee: Aumovio Systems Inc
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Filing: 1994-09-16
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Granted: 1996-01-30
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Expires: 2014-09-16
Abstract
Abstract A backup battery management method (200), and corresponding apparatus (101 ) monitors a system voltage (111 ) and charges a backup battery (109) while a short-term average (405) of the system voltage exceeds a long-term average (407) of the system voltage.
Inventors
- 👤 Steven D. Bromley
- 👤 James F. Herrmann
- 👤 Mark V. Emery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:31
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/165; G01R19/16533; G01R19/16538; G01R19/16542; G01R31/00; G01R31/36; G01R31/3644; G01R31/3648; H; H01; H01M; H01M10/00; H01M10/42; H01M10/44; H02; H02J; H02J7/00; H02J7/14; H02J7/1423; H02J9/00; H02J9/04; H02J9/06; H02J9/061; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S320/00; Y10S320/13
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
93 words
A backup battery management method having a backup battery and a charging system driving a vehicle battery, the method comprising the steps of: averaging a voltage derived from the vehicle battery at a first rate and providing a short-term average system voltage in response thereto; averaging the short-term average system voltage, at a second rate lesser than the first rate, and providing a long-term average voltage in response thereto; and charging the backup battery from the charging system while the short-term average system voltage exceeds the long-term average voltage by a predetermined threshold.
Claim 2
Dependent Claim
93 words
A backup battery management method having a backup battery and a charging system driving a vehicle battery, the method comprising the steps of: averaging a voltage derived from the vehicle battery at a first rate and providing a short-term average system voltage in response thereto; averaging the short-term average system voltage, at a second rate lesser than the first rate, and providing a long-term average voltage in response thereto; and charging the backup battery from the charging system while the short-term average system voltage exceeds the long-term average voltage by a predetermined threshold.
Claim 3
Dependent Claim
44 words
A method in accordance with claim 1 further comprising the step of: establishing a first threshold; and charging the backup battery from the charging system while the short-term average system voltage exceeds the first threshold, established in the step of establishing a first threshold.
Claim 4
Dependent Claim
47 words
A method in accordance with claim 1 further comprising the step of: establishing a second threshold; and stopping the charging of the backup battery from the charging system while the short-term average system voltage exceeds a second threshold, established in the step of establishing a second threshold.
Claim 5
Dependent Claim
50 words
A method in accordance with claim 1 further comprising the steps of: determining if the backup battery is shorted; and stopping the charging of the backup battery from the charging system while the backup battery is shorted as determined in the step of determining if the backup battery is shorted.
Claim 6
Dependent Claim
56 words
A method in accordance with claim 4 wherein the step of determining if the backup battery is shorted comprises the steps of: charging the backup battery for a predetermined time; measuring a voltage of the backup battery; posting a backup battery shorted flag when the voltage of the backup battery does not exceed a predetermined threshold.
Claim 7
Dependent Claim
100 words
A backup battery management apparatus having a backup battery and a charging system driving a vehicle battery, the apparatus comprising: first averaging means for averaging a voltage derived from the vehicle battery at a first rate and providing a short-term average system voltage in response thereto; second averaging means for averaging the short-term average system voltage, at a second rate lesser than the first rate, and providing a long-term average voltage in response thereto; and means for charging the backup battery from the charging system while the short-term average system voltage exceeds the long-term average voltage by a predetermined threshold.
Claim 8
Dependent Claim
100 words
A backup battery management apparatus having a backup battery and a charging system driving a vehicle battery, the apparatus comprising: first averaging means for averaging a voltage derived from the vehicle battery at a first rate and providing a short-term average system voltage in response thereto; second averaging means for averaging the short-term average system voltage, at a second rate lesser than the first rate, and providing a long-term average voltage in response thereto; and means for charging the backup battery from the charging system while the short-term average system voltage exceeds the long-term average voltage by a predetermined threshold.
Claim 9
Dependent Claim
34 words
A apparatus in accordance with claim 6 further comprising: means for establishing a first threshold; and charging the backup battery from the charging system while the short-term average system voltage exceeds the first threshold.
Claim 10
Dependent Claim
37 words
A apparatus in accordance with claim 6 further comprising: means for establishing a second threshold; and stopping the charging of the backup battery from the charging system while the short-term average system voltage exceeds the second threshold.
Claim 11
Dependent Claim
45 words
A apparatus in accordance with claim 6 further comprising: means for determining if the backup battery is shorted; and means for stopping the charging of the backup battery from the charging system while the backup battery is shorted as determined by the means for determining.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-29 | 1999-07-31 | 2000-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-29 | 2003-07-31 | 2004-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-29 | 2007-07-31 | 2008-01-30 | $7700.00 | Window Closed / Lapsed |