US4912416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic battery testing device with state-of-charge compensation
Assignee: Individual
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Filing: 1989-06-16
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Granted: 1990-03-27
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Expires: 2009-06-16
Abstract
Abstract A self-contained electronic device for testing storage batteries that may be partially discharged is disclosed. The testing device performs small-signal measurements of the battery's dynamic conductance and provides either a proportional numerical readout, displayed in appropriate battery measuring units, or a corresponding qualitative assessment of the battery's relative conduction based upon its electrical rating. In addition, the testing device measures the battery's open-circuit (unloaded) voltage and provides adjustable means for correcting the dynamic conductance test result in inverse correspondence with the battery's open-circuit voltage relative to its fully-charged value. By virtue of this correction, the quantitative or qualitative information displayed to the user in the dynamic conductance test is adjusted to comport with that of a fully-charged battery even through the battery may, in actual fact, be only partially charged when tested.
Inventors
- 👤 Keith S. Champlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:29
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/36; G01R31/389
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
66 words
A process for testing a partially charged electrochemical cell or battery having an open-circuit voltage and a dynamic conductance comprising the steps of: a. determining the value of the open-circuit voltage; b. generating a signal proportional to the dynamic conductance; c. adjusting the signal level in inverse correspondence with the value of the open-circuit voltage relative to a fully-charged value; and, d. displaying the adjusted result.
Claim 2
Dependent Claim
66 words
A process for testing a partially charged electrochemical cell or battery having an open-circuit voltage and a dynamic conductance comprising the steps of: a. determining the value of the open-circuit voltage; b. generating a signal proportional to the dynamic conductance; c. adjusting the signal level in inverse correspondence with the value of the open-circuit voltage relative to a fully-charged value; and, d. displaying the adjusted result.
Claim 3
Dependent Claim
39 words
A process as in claim 1 wherein the step of determining the value of the open-circuit voltage comprises measuring the open-circuit voltage value, and the step of adjusting the signal level comprises manually entering the measured open-circuit voltage value.
Claim 4
Dependent Claim
36 words
A process as in claim 1 wherein the step of displaying the adjusted result comprises displaying a particular one of a plurality of qualitative results selected in accordance with the magnitude of the adjusted signal level.
Claim 5
Dependent Claim
30 words
A process as in claim 3 wherein the cell or battery has an electrical rating, including the step of manually adjusting the signal level in accordance with the electrical rating.
Claim 6
Dependent Claim
28 words
A process as in claim 1 wherein the step of displaying the adjusted result comprises displaying a numerical result proportional to the magnitude of the adjusted signal level.
Claim 7
Dependent Claim
58 words
A process for testing a partially charged electrochemical cell or battery having an open-circuit voltage and a dynamic conductance comprising the steps of: a. measuring the open-circuit voltage; b. measuring the dynamic conductance; c. adjusting the measured dynamic conductance in inverse correspondence with the measured open-circuit voltage relative to a fully-charged value; and, d. displaying the adjusted result.
Claim 8
Dependent Claim
58 words
A process for testing a partially charged electrochemical cell or battery having an open-circuit voltage and a dynamic conductance comprising the steps of: a. measuring the open-circuit voltage; b. measuring the dynamic conductance; c. adjusting the measured dynamic conductance in inverse correspondence with the measured open-circuit voltage relative to a fully-charged value; and, d. displaying the adjusted result.
Claim 9
Dependent Claim
22 words
A process as in claim 6 wherein the step of adjusting the measured dynamic conductance comprises manually entering the measured open-circuit voltage.
Claim 10
Dependent Claim
36 words
A process as in claim 6 wherein the step of displaying the adjusted result comprises displaying a particular one of a plurality of qualitative results selected in accordance with the magnitude of the adjusted dynamic conductance.
Claim 11
Dependent Claim
31 words
A process as in claim 8 wherein the cell or battery has an electrical rating, including the step of manually adjusting the measured dynamic conductance in accordance with the electrical rating.
Claim 12
Dependent Claim
28 words
A process as in claim 6 wherein the step of displaying the adjusted result comprises displaying a numerical result proportional to the magnitude of the adjusted dynamic conductance.
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) | 1993-03-26 | 1993-09-25 | 1994-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-26 | 1997-09-25 | 1998-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-26 | 2001-09-25 | 2002-03-27 | $7700.00 | Window Closed / Lapsed |