METHOD AND CIRCUITRY TO ADAPTIVELY CHARGE A BATTERY/CELL USING THE STATE OF HEALTH THEREOF
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Accused Products
Abstract
The present inventions, in one aspect, are directed to techniques and/or circuitry to determining data which is representative of the state of health, or a change therein, of the battery using the data which is representative of (i) the relaxation time of the battery and/or (ii) the overpotential of the battery. In another aspect the present inventions are directed to techniques and/or circuitry to adapt one or more characteristics of a charge signal using data which is representative of the state of health, or a change therein, of the battery. In yet another aspect the present inventions are directed to techniques and/or circuitry to determine a state of charge of the battery using data which is representative of the state of health, or a change therein, of the battery.
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Citations
51 Claims
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1-23. -23. (canceled)
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24. A method to determine a state of health of a battery, wherein the battery includes at least two terminals, the method comprising:
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(a) applying a signal to at least two terminals of the battery; (b) measuring a terminal voltage between terminals of the battery at a predetermined time relative to applying to the signal; and (c) from the measurements of the terminal voltage in (b), determining a state of health of the battery or a change therein, wherein the state of health is representative of degradation of the battery and/or an ability of the battery to hold a charge. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. An apparatus to charge a battery including at least two terminals, the apparatus comprising:
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charging circuitry, coupled to the battery, to; generate a signal, and apply the signal to the battery; monitoring circuitry, coupled to the battery, to measure a voltage at the terminals of the battery; and control circuitry, coupled to the charging circuitry and the measuring circuitry, and configured to; (a) apply the signal to at least two terminals of the battery; (b) measure a terminal voltage between terminals of the battery at a predetermined time relative to applying to the signal; and (c) from the measurements of the terminal voltage in (b), determine a state of health of the battery or a change therein, wherein the state of health is representative of degradation of the battery and/or an ability of the battery to hold a charge. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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Specification