Electronic battery testing device with state-of-charge compensation
First Claim
1. 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.
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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.
287 Citations
10 Claims
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1. A process for testing a partially charged electrochemical cell or battery having an open-circuit voltage and a dynamic conductance comprising the steps of:
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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. - View Dependent Claims (2, 3, 4, 5)
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6. A process for testing a partially charged electrochemical cell or battery having an open-circuit voltage and a dynamic conductance comprising the steps of:
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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. - View Dependent Claims (7, 8, 9, 10)
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Specification