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US5608325A
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Method of recalibrating a battery energy management processor
Assignee: Thales SA
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Filing: 1994-07-26
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Granted: 1997-03-04
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Expires: 2014-07-26
Abstract
Abstract The method of recalibrating an energy management processor of a battery of accumulators consists, at the end of a defined period of time, in initiating a process of recalibration of evaluation of the quantity of electrical energy contained in the battery, in completely recharging the battery, in detecting the end of the complete recharge of the battery, in performing a partial discharge of the battery, in measuring the quantity of electricity extracted during this discharge, in leaving the battery to rest for a defined time, in totally discharging the battery at a low current while measuring the quantity of electricity thus extracted from the battery, in adding the said two quantities of electricity measured in order to obtain the value of the maximum capacity of the battery at the moment of the recalibration.
Inventors
- 👤 Philippe Chabbert
- 👤 Alain Chatenay
- 👤 Christian Menard
- 👤 Dominique Meux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:16
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/36; G01R31/382; G01R31/3828; G01R31/3832; G01R35/00; G01R35/005; H; H02; H02J; H02J7/00; H02J7/90; H02J7/94; G01R19/00; G01R19/165; G01R19/16533; G01R19/16538; G01R19/16542
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
134 words
A method of recalibrating a previously calibrated energy management processor of a battery of accumulators, comprising the steps of: at the end of a defined period of time after said previous calibration, initiating a process of determining the quantity of electrical energy contained in the battery, completely recharging the battery, detecting the end of the complete recharge of the battery, performing a partial discharge of the battery, measuring the quantity of electrical energy extracted during this discharge, leaving the battery at rest for a defined time, totally discharging the battery at a low current while measuring the quantity of electrical energy thus extracted from the battery, adding the said two quantities of electrical energy measured in order to obtain the value of the maximum capacity of the battery at the moment of the recalibration.
Claim 2
Independent Claim
134 words
A method of recalibrating a previously calibrated energy management processor of a battery of accumulators, comprising the steps of: at the end of a defined period of time after said previous calibration, initiating a process of determining the quantity of electrical energy contained in the battery, completely recharging the battery, detecting the end of the complete recharge of the battery, performing a partial discharge of the battery, measuring the quantity of electrical energy extracted during this discharge, leaving the battery at rest for a defined time, totally discharging the battery at a low current while measuring the quantity of electrical energy thus extracted from the battery, adding the said two quantities of electrical energy measured in order to obtain the value of the maximum capacity of the battery at the moment of the recalibration.
Claim 3
Dependent Claim
18 words
Method according to claim 1, wherein a complete recharging of the battery is detected by a battery charger.
Claim 4
Dependent Claim
20 words
Method according to claim 1, wherein a complete recharging of the battery is detected by the battery energy management processor.
Claim 5
Dependent Claim
24 words
Method according to claim 1, wherein a partial discharging of the battery is carried out in the normal pattern of use of the battery.
Claim 6
Dependent Claim
28 words
Method according to claim 1, wherein the battery is allowed to rest for a minimum time which is sufficient for the battery to recover all its available charge.
Claim 7
Dependent Claim
34 words
Method according to claim 1, wherein, if, during the time when the battery is resting, the battery is partially recharged, and the recalibration method is restarted by recommencing the complete recharging of the battery.
Claim 8
Dependent Claim
33 words
Method according to claim 1, characterized in that if, during the time when the battery is resting, the battery is accidentally discharged at high current, the period for which it rests is extended.
Claim 9
Dependent Claim
28 words
Method according to claim 1, wherein the complete discharging of the battery takes place for a current providing for it to be completely discharged in about 5 hours.
Claim 10
Dependent Claim
25 words
Method according to claim 8, wherein the complete discharging of the battery is stopped when the voltage at its terminals reaches a minimum admissible value.
Claim 11
Dependent Claim
35 words
Method according to claim 8, wherein the complete discharging of the battery is stopped when the drift with respect to time of the reduction in the voltage of the battery reaches a maximum admissible value.
Claim 12
Dependent Claim
16 words
Method according to claim 10, wherein said battery is a traction battery for an electric vehicle.
Claim 13
Dependent Claim
22 words
Method according to claim 11, wherein the complete discharging of the battery is performed on at least one element of the vehicle.
Claim 14
Dependent Claim
26 words
Method according to claim 2, characterized in that the partial discharging of the battery is carried out in the normal pattern of use of the battery.
Claim 15
Dependent Claim
26 words
Method according to claim 3, characterized in that the partial discharging of the battery is carried out in the normal pattern of use of the battery.
Claim 16
Dependent Claim
30 words
Method according to claim 2, characterized in that the battery is allowed to rest for a minimum time which is sufficient for the battery to recover all its available charge.
Claim 17
Dependent Claim
30 words
Method according to claim 3, characterized in that the battery is allowed to rest for a minimum time which is sufficient for the battery to recover all its available charge.
Claim 18
Dependent Claim
30 words
Method according to claim 4, characterized in that the battery is allowed to rest for a minimum time which is sufficient for the battery to recover all its available charge.
Claim 19
Dependent Claim
35 words
Method according to claim 2, characterized in that if, during the time when the battery is resting, the battery is partially recharged, the recalibration method is restarted by recommencing the complete recharging of the battery.
Claim 20
Dependent Claim
35 words
Method according to claim 3, characterized in that if, during the time when the battery is resting, the battery is partially recharged, the recalibration method is restarted by recommencing the complete recharging of the battery.
Claim 21
Dependent Claim
35 words
Method according to claim 4, characterized in that if, during the time when the battery is resting, the battery is partially recharged, the recalibration method is restarted by recommencing the complete recharging of the battery.
References Cited (Backward Citations)
US5352982A
Cited
US5539318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2000-03-03 | 2000-09-02 | 2001-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-03 | 2004-09-02 | 2005-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-03 | 2008-09-02 | 2009-03-04 | $7700.00 | Window Closed / Lapsed |