US5708347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for accelerating the depolarization of a polarized battery to facilitate battery testing
Assignee: Honeywell International Inc
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Filing: 1996-07-30
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Granted: 1998-01-13
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Expires: 2016-07-30
Abstract
Abstract A method for depolarizing polarized batteries before determining the capacity of the battery by first discharging the polarized battery for a minimum time of about thirty seconds and under a current load of about 0.5 amps and then sensing the battery terminal voltage and discharging the battery again if the rate of change of the battery voltage exceeds 10 mV/30 seconds or the voltage to cell ration exceeds 2.13.
Inventors
- 👤 Thirumalai Gounder Palanisamy
- 👤 John Anthony Hosty
- 👤 Harmohan Narinjan Singh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:49
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/42; H01M10/44; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
44 words
A method for depolarizing a polarized battery having a declining open circuit voltage comprising the steps: a. discharging said polarized battery; b. sensing said open circuit voltage; and c. repeating step (a) if said open circuit voltage continues to decline above a minimum rate.
Claim 2
Independent Claim
44 words
A method for depolarizing a polarized battery having a declining open circuit voltage comprising the steps: a. discharging said polarized battery; b. sensing said open circuit voltage; and c. repeating step (a) if said open circuit voltage continues to decline above a minimum rate.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein step (a), said polarized battery is discharged for a minimum of thirty seconds.
Claim 4
Dependent Claim
32 words
The method of claim 1 wherein step (a) further comprises discharging said battery at a current load from between about 0.5 to about 1.0 percent of the current capacity of said battery.
Claim 5
Dependent Claim
12 words
The method of claim 3 wherein said current load is 0.5 amps.
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein said minimum rate is 10 mV/30 seconds.
Claim 7
Dependent Claim
24 words
The method of claim 1 wherein step (c) further comprises waiting for a period of time of about five minutes before repeating step (a).
Claim 8
Dependent Claim
13 words
The method of claim 1 wherein said battery is a lead acid battery.
Claim 9
Independent Claim
58 words
A method for depolarizing a polarized battery having a declining open circuit voltage comprising the steps: a. discharging said polarized battery until said open circuit voltage decreases an amount of no less than 0.1 volts; b. sensing said open circuit voltage; and c. repeating step (a) if said open circuit voltage continues to decline above a minimum rate.
Claim 10
Independent Claim
58 words
A method for depolarizing a polarized battery having a declining open circuit voltage comprising the steps: a. discharging said polarized battery until said open circuit voltage decreases an amount of no less than 0.1 volts; b. sensing said open circuit voltage; and c. repeating step (a) if said open circuit voltage continues to decline above a minimum rate.
Claim 11
Dependent Claim
13 words
The method of claim 8 wherein said minimum rate is 10 mV/30 seconds.
Claim 12
Dependent Claim
24 words
The method of claim 8 wherein step (c) further comprises waiting for a period of time of about five minutes before repeating step (a).
Claim 13
Independent Claim
52 words
A method for depolarizing a polarized battery having an open circuit voltage that exceeds a minimum voltage to cell ratio comprising the steps: a. discharging said polarized battery; b. sensing said open circuit voltage; and c. repeating step (a) if said voltage to cell ratio exceeds said minimum voltage to cell ratio.
Claim 14
Independent Claim
52 words
A method for depolarizing a polarized battery having an open circuit voltage that exceeds a minimum voltage to cell ratio comprising the steps: a. discharging said polarized battery; b. sensing said open circuit voltage; and c. repeating step (a) if said voltage to cell ratio exceeds said minimum voltage to cell ratio.
Claim 15
Dependent Claim
19 words
The method of claim 11 wherein step (a), said polarized battery is discharged for a minimum of thirty seconds.
Claim 16
Dependent Claim
32 words
The method of claim 11 wherein step (a) further comprises discharging said battery at a current load from between about 0.5 to about 1.0 percent of the current capacity of said battery.
Claim 17
Dependent Claim
12 words
The method of claim 13 wherein said current load is 0.5 amps.
Claim 18
Dependent Claim
14 words
The method of claim 11 wherein said minimum voltage to cell ratio is 2.13.
Claim 19
Independent Claim
44 words
A method for depolarizing a polarized battery comprising the steps: a. discharging said polarized battery; b. sensing a maximum peak open circuit voltage; and c. repeating step (a) if said maximum peak open circuit voltage is greater than a predetermined minimum open circuit voltage.
Claim 20
Independent Claim
44 words
A method for depolarizing a polarized battery comprising the steps: a. discharging said polarized battery; b. sensing a maximum peak open circuit voltage; and c. repeating step (a) if said maximum peak open circuit voltage is greater than a predetermined minimum open circuit voltage.
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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) | 2001-01-12 | 2001-07-14 | 2002-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-01-12 | 2005-07-14 | 2006-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-01-12 | 2009-07-14 | 2010-01-13 | $7700.00 | Window Closed / Lapsed |