US4881038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric battery testing device with automatic voltage scaling to determine dynamic conductance
Assignee: Individual
•
Filing: 1988-11-18
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Granted: 1989-11-14
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Expires: 2008-11-18
Abstract
Abstract A self-contained electronic device for testing disparate storage batteries having any one of a fixed plurality of possible nominal voltages is disclosed. The testing device performs small-signal measurements of a 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 condition. Special voltage-sensing circuitry within the testing device identifies the particular one of the possible nominal voltages possessed by the battery and scales the dynamic conductance measurements accordingly. As a result, the quantitative or qualitative information provided to the user is automatically adjusted to comport with the nominal voltage of the battery undergoing test without the user having to actually input the battery's nominal voltage to the testing device.
Inventors
- 👤 Keith S. Champlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:30
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/36; G01R31/389
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
49 words
A process for testing a battery having a dynamic conductance and a nominal voltage comprising the steps of: a. measuring the battery's dynamic conductance; b. determining the battery's nominal voltage; c. automatically scaling the measured dynamic conductance in accordance with the battery's nominal voltage; d. displaying the scaled result.
Claim 2
Dependent Claim
49 words
A process for testing a battery having a dynamic conductance and a nominal voltage comprising the steps of: a. measuring the battery's dynamic conductance; b. determining the battery's nominal voltage; c. automatically scaling the measured dynamic conductance in accordance with the battery's nominal voltage; d. displaying the scaled result.
Claim 3
Dependent Claim
32 words
A process as in claim 1 wherein the battery has an electrical rating and the process includes the step of manually scaling the measured dynamic conductance in accordance with the electrical rating.
Claim 4
Dependent Claim
26 words
A process as in claim 1 wherein the step of automatically scaling comprises automatically scaling the measured dynamic conductance in proportion to the battery's nominal voltage.
Claim 5
Dependent Claim
29 words
A process as in claim 1 wherein the step of automatically scaling comprises automatically scaling the measured dynamic conductance in proportion to the square of the battery's nominal voltage.
Claim 6
Dependent Claim
23 words
A process as in claim 1 wherein the step of displaying the scaled result comprises displaying numbers proportional to the scaled dynamic conductance.
Claim 7
Dependent Claim
31 words
A process as in claim 2 wherein the step of displaying the scaled result comprises displaying one of a plurality of qualitative results selected in accordance with the scaled dynamic conductance.
Claim 8
Dependent Claim
79 words
A process for testing a battery having a dynamic conductance, a terminal voltage, and a nominal voltage comprising the steps: a. determining the battery's dynamic conductance; b. sensing the battery's terminal voltage; c. comparing the sensed terminal voltage with at least one fixed reference voltage and thereby identifying the battery's particular nominal voltage from among a fixed plurality of possible values; d. automatically scaling the dynamic conductance in accordance with the identified nominal voltage; e. displaying the scaled result.
Claim 9
Dependent Claim
79 words
A process for testing a battery having a dynamic conductance, a terminal voltage, and a nominal voltage comprising the steps: a. determining the battery's dynamic conductance; b. sensing the battery's terminal voltage; c. comparing the sensed terminal voltage with at least one fixed reference voltage and thereby identifying the battery's particular nominal voltage from among a fixed plurality of possible values; d. automatically scaling the dynamic conductance in accordance with the identified nominal voltage; e. displaying the scaled result.
Claim 10
Dependent Claim
23 words
A process as in claim 7 wherein the step of displaying the scaled result comprises displaying numbers proportional to the scaled dynamic conductance.
Claim 11
Dependent Claim
31 words
A process as in claim 7 wherein the step of displaying the scaled result comprises displaying one of a plurality of qualitative results selected in accordance with the scaled dynamic conductance.
Claim 12
Dependent Claim
32 words
A process as in claim 9 wherein the battery has an electrical rating and the process further includes the step of manually scaling the dynamic conductance in accordance with the electrical rating.
Claim 13
Dependent Claim
25 words
A process as in claim 7 wherein the step of automatically scaling comprises automatically scaling the dynamic conductance in proportion to the identified nominal voltage.
Claim 14
Dependent Claim
28 words
A process as in claim 7 wherein the step of automatically scaling comprises automatically scaling the dynamic conductance in proportion to the square of the identified nominal voltage.
Claim 15
Dependent Claim
75 words
A process for testing a battery having a dynamic conductance, a temrnal voltage and a nominal voltage comprising the steps of: a. determining the battery's dynamic conductance; b. sensing the battery's terminal voltage; c. comparing the sensed terminal voltage with a fixed reference voltage and thereby identifying the battery's particular nominal voltage from among two possible values; d. automatically scaling the dynamic conductance in accordance with said identified nominal voltage; e. displaying the scaled result.
Claim 16
Dependent Claim
75 words
A process for testing a battery having a dynamic conductance, a temrnal voltage and a nominal voltage comprising the steps of: a. determining the battery's dynamic conductance; b. sensing the battery's terminal voltage; c. comparing the sensed terminal voltage with a fixed reference voltage and thereby identifying the battery's particular nominal voltage from among two possible values; d. automatically scaling the dynamic conductance in accordance with said identified nominal voltage; e. displaying the scaled result.
Claim 17
Dependent Claim
19 words
A process as in claim 13 wherein the two possible nominal voltage values are six volts and twelve volts.
Claim 18
Dependent Claim
23 words
A process as in claim 13 wherein the step of displaying the scaled result comprises displaying numbers proportional to the scaled dynamic conductance.
Claim 19
Dependent Claim
31 words
A process as in claim 13 wherein the step of displaying the scaled result comprises displaying one of a plurality of qualitative results selected in accordance with the scaled dynamic conductance.
Claim 20
Dependent Claim
32 words
A process as in claim 16 wherein the battery has an electrical rating and the process further includes the step of manually scaling the dynamic conductance in accordance with the electrical rating.
Claim 21
Dependent Claim
25 words
A process as in claim 13 wherein the step of automatically scaling comprises automatically scaling the dynamic conductance in proportion to the identified nominal voltage.
Claim 22
Dependent Claim
28 words
A process as in claim 13 wherein the step of automatically scaling comprises automatically scaling the dynamic conductance in proportion to the square of the identical nominal voltage.
References Cited (Backward Citations)
US3909708A
Cited
US4408157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |