APPARATUS FOR ESTIMATING DEPTH OF DISCHARGE (DOD) OF SECONDARY BATTERY
2 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is an apparatus and method for estimating a parameter of a secondary battery. The apparatus includes a sensor unit configured to repeatedly measure a voltage of a secondary battery including a blended cathode material containing at least first and second cathode materials at time intervals when the secondary battery is in an operation state or in an idle state, and a control unit configured to receive the repeatedly measured plurality of voltages from the sensor unit, identify an inflection point in a voltage change profile corresponding to the plurality of voltages, and estimate a depth of discharge (DOD) of the secondary battery by using a voltage measured after the inflection point is identified as a reference voltage.
16 Citations
45 Claims
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1-21. -21. (canceled)
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22. An apparatus for estimating a depth of discharging (DOD) of a secondary battery, comprising:
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a sensor unit configured to repeatedly measure a voltage of a secondary battery including a blended cathode material containing at least first and second cathode materials at time intervals when the secondary battery is in an operation state or in an idle state; and a control unit configured to receive the repeatedly measured plurality of voltages from the sensor unit, identify an inflection point in a voltage change profile corresponding to the plurality of voltages, and estimate a DOD of the secondary battery by using a voltage measured after the inflection point is identified as a reference voltage. - View Dependent Claims (23, 24, 25, 26, 32, 34)
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27. An apparatus for estimating a DOD of a secondary battery, comprising:
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a sensor unit configured to repeatedly measure a voltage of a secondary battery including a blended cathode material containing at least first and second cathode materials at time intervals when the secondary battery is in an operation state or in an idle state; and a control unit configured to receive the repeatedly measured plurality of voltages from the sensor unit, identify an inflection point in a voltage change profile corresponding to the plurality of voltages, estimate a reference voltage, which is to be used for estimating a DOD of the secondary battery, by means of extrapolation from a plurality of voltages measured after the inflection point is identified, and estimate the DOD by using the reference voltage. - View Dependent Claims (28, 29, 30, 31, 33, 35)
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36. A method for estimating a DOD of a secondary battery, comprising:
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(a) receiving a plurality of voltages of a secondary battery, which have been repeatedly measured at time intervals when the secondary battery including a blended cathode material containing at least first and second cathode materials is in an operation state or in an idle state; (b) identifying an inflection point in a voltage change profile corresponding to the plurality of voltages; (c) selecting a voltage, measured after the inflection point is identified, as a reference voltage; and (d) estimating a DOD of the secondary battery by using the reference voltage. - View Dependent Claims (37, 38, 39, 44)
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40. A method for estimating a DOD of a secondary battery, comprising:
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(a) receiving a plurality of voltages of a secondary battery, which have been repeatedly measured at time intervals when the secondary battery including a blended cathode material containing at least first and second cathode materials is in an operation state or in an idle state; (b) identifying an inflection point in a voltage change profile corresponding to the plurality of voltages; (c) estimating a reference voltage, which is to be used for estimating a DOD of the secondary battery, by means of extrapolation from a plurality of voltages measured after the inflection point is identified; and (d) estimating the DOD by using the estimated reference voltage. - View Dependent Claims (41, 42, 43, 45)
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Specification