US4829225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid battery charger, discharger and conditioner
Assignee: Advanced Charger Technology Inc
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Filing: 1985-10-23
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Granted: 1989-05-09
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Expires: 2005-10-23
Abstract
Abstract An improved method and device for rapidly charging a battery by providing a charge pulse to the battery, followed immediately by a depolarization pulse created by allowing the battery to discharge across a load, followed by a stabilization period, and repeating this sequence cyclically until the battery is charged is disclosed. Preferably, the current level of the charge pulse is equal to or greater than the nominal rated current at which the battery can discharge in an hour, in order to achieve rapid charging. The duration of the charge pulse will generally be about one-tenth to two seconds. The current level of the depolarization pulse may be approximately the same magnitude or greater than the charging current, but of significantly shorter duration, such as 0.2-5% of the duration, to avoid unnecessary discharging of the battery. The duration of the stabilization period is generally greater than the magnitude of the depolarizing pulse. By optimizing these time and current characteristics of the charge, depolarization and stabilization periods for any particular type of battery, the battery may be charged most rapidly while prolonging the life of the battery. These characteristics may also be varied as the battery is charged based on the charge of the battery measured under load.
Inventors
- 👤 Yury Podrazhansky
- 👤 Phillip W. Popp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:12
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/42; H01M10/44; H02; H02J; H02J7/00; H02J7/90; H02J7/927; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
83 words
A method of rapidly charging a battery which comprises the steps of: applying to the battery an electrical charging pulse; depolarizing the battery by applying a load across the battery immediately after said charging pulse step; allowing a stabilization period of a predetermined duration after the depolarization step and prior to the next charging pulse step; and measuring the change of the battery during said depolarizing step; wherein said sequence of steps is cyclically repeated until the desired level of charge is achieved.
Claim 2
Independent Claim
83 words
A method of rapidly charging a battery which comprises the steps of: applying to the battery an electrical charging pulse; depolarizing the battery by applying a load across the battery immediately after said charging pulse step; allowing a stabilization period of a predetermined duration after the depolarization step and prior to the next charging pulse step; and measuring the change of the battery during said depolarizing step; wherein said sequence of steps is cyclically repeated until the desired level of charge is achieved.
Claim 3
Dependent Claim
38 words
The method of claim 1, which further comprises the steps of varying the current of the charge pulse in the charging step and changing the load in the depolarization step when the measured charge reaches a predetermined level.
Claim 4
Dependent Claim
31 words
The method of claim 2, wherein the current of the charge pulse is reduced and the load in the depolarization step is increased when the measured charge reaches a predetermined level.
Claim 5
Dependent Claim
22 words
The method of claim 3, where said predetermined level is a level of charge such that the battery is near full charge.
Claim 6
Independent Claim
96 words
A method of rapidly charging a battery which comprises the steps of: applying to the battery an electrical charging pulse; depolarizing the battery by applying a load across the battery immediately after said charging pulse step; and allowing a stabilization period of a predetermined duration after the depolarization step and prior to the next charging pulse step; wherein said sequence of steps is cyclically repeated until the desired level of charge is achieved, and wherein the current level of the charge pulse and the load of said depolarization step are varied as the battery is charged.
Claim 7
Independent Claim
96 words
A method of rapidly charging a battery which comprises the steps of: applying to the battery an electrical charging pulse; depolarizing the battery by applying a load across the battery immediately after said charging pulse step; and allowing a stabilization period of a predetermined duration after the depolarization step and prior to the next charging pulse step; wherein said sequence of steps is cyclically repeated until the desired level of charge is achieved, and wherein the current level of the charge pulse and the load of said depolarization step are varied as the battery is charged.
Claim 8
Dependent Claim
20 words
The method of claim 5, wherein the charge current and the depolarization current are reduced as the battery is charged.
Claim 9
Independent Claim
107 words
A method of rapidly charging a battery which comprises the steps of: applying to the battery an electrical charging pulse; depolarizing the battery by applying a load across the battery immediately after said charging pulse step; and allowing a stabilization period of a predetermined duration after the depolarization step and prior to the next charging pulse step; wherein said sequence of steps is cyclically repeated until the desired level of charging is achieved; and wherein the current level of the charge pulse remains constant as the battery is charged and the depolarization load is changed such that the depolarization current is varied as the battery is charged.
Claim 10
Independent Claim
107 words
A method of rapidly charging a battery which comprises the steps of: applying to the battery an electrical charging pulse; depolarizing the battery by applying a load across the battery immediately after said charging pulse step; and allowing a stabilization period of a predetermined duration after the depolarization step and prior to the next charging pulse step; wherein said sequence of steps is cyclically repeated until the desired level of charging is achieved; and wherein the current level of the charge pulse remains constant as the battery is charged and the depolarization load is changed such that the depolarization current is varied as the battery is charged.
Claim 11
Dependent Claim
23 words
The method of claim 7, wherein the depolarization load is decreased such that the depolarization current is increased as the battery is charged.
Claim 12
Independent Claim
116 words
A device for rapidly reconditioning a battery, which comprises: means for applying a positively charged electrical pulse to the battery; means for applying a load across the battery; means for measuring the charge of the battery when said load is applied to the battery; and control means for controlling said positively charged electrical pulse applying means and said load applying means such that the battery may be rapidly discharged by periodically applying a depolarizing positively charged electrical pulse to the battery during discharge and rapidly charged by periodically applying a depolarizing load across the battery during charging, and based on input from said charge measuring means, determining when to alternate between charging and discharging the battery.
Claim 13
Independent Claim
116 words
A device for rapidly reconditioning a battery, which comprises: means for applying a positively charged electrical pulse to the battery; means for applying a load across the battery; means for measuring the charge of the battery when said load is applied to the battery; and control means for controlling said positively charged electrical pulse applying means and said load applying means such that the battery may be rapidly discharged by periodically applying a depolarizing positively charged electrical pulse to the battery during discharge and rapidly charged by periodically applying a depolarizing load across the battery during charging, and based on input from said charge measuring means, determining when to alternate between charging and discharging the battery.
Claim 14
Dependent Claim
54 words
The device of claim 9, wherein, when charging the battery, said control means operates to apply a load immediately after it applies said positively charged electrical pulse to the battery, then allows a stabilization period of a predetermined duration to occur before applying the next positively charge electrical pulse, and cyclically repeats the sequence.
Claim 15
Dependent Claim
31 words
The device of claim 9, wherein, when discharging the battery, said control means alternates the application of said load applying means and said means for applying a positively charged electrical pulse.
Claim 16
Dependent Claim
31 words
The device of claim 10, wherein, when discharging the battery, said control means alternates the application of said load applying means and said means for applying a positively charged electrical pulse.
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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) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |