Method and circuitry to adaptively charge a battery/cell using the state of health thereof
First Claim
1. A method to determine a state of health of a battery, wherein the battery includes at least two terminals, the method comprising:
- applying a signal to the terminals of the battery, wherein the signal includes at least one pulse;
measuring a terminal voltage of the battery which is a voltage between the terminals of the battery, wherein measuring the terminal voltage of the battery includes measuring a first terminal voltage of the battery at a first predetermined time relative to applying the signal to the terminals of the battery;
monitoring the terminal voltage of the battery after applying the at least one pulse to the terminals of the battery to determine a second terminal voltage, wherein the second terminal voltage of the battery is a voltage which correlates to an equilibrium voltage of the battery; and
calculating data which is representative of the overpotential of the battery using the first terminal voltage of the battery and the second terminal voltage of the battery;
determining data which is representative of the state of health, or a change therein, of the battery using the data which is representative of the overpotential of the battery.
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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.
147 Citations
23 Claims
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1. 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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applying a signal to the terminals of the battery, wherein the signal includes at least one pulse; measuring a terminal voltage of the battery which is a voltage between the terminals of the battery, wherein measuring the terminal voltage of the battery includes measuring a first terminal voltage of the battery at a first predetermined time relative to applying the signal to the terminals of the battery; monitoring the terminal voltage of the battery after applying the at least one pulse to the terminals of the battery to determine a second terminal voltage, wherein the second terminal voltage of the battery is a voltage which correlates to an equilibrium voltage of the battery; and calculating data which is representative of the overpotential of the battery using the first terminal voltage of the battery and the second terminal voltage of the battery; determining data which is representative of the state of health, or a change therein, of the battery using the data which is representative of the overpotential of the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. 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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applying a signal to the terminals of the battery, wherein the signal includes at least one pulse; measuring a voltage at the terminals of the battery, wherein the voltage is a terminal voltage of the battery; determining data which is representative of a relaxation time of the battery, wherein the relaxation time is an amount of time corresponding to when, in response to the pulse of the signal, the terminal voltage of the battery decays to at least a predetermined voltage; and determining data which is representative of the state of health, or a change therein, of the battery using the data which is representative of the relaxation time of the battery. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. 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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applying a signal to the terminals of the battery, wherein the signal includes a plurality of pulses; measuring a terminal voltage of the battery which is a voltage between the terminals of the battery; calculating data which is representative of a partial relaxation time of the battery, wherein the partial relaxation time is an amount of time corresponding to when, in response to a pulse of the plurality of pulses of the signal, the terminal voltage of the battery decays to at least a predetermined voltage; calculating data which is representative of the overpotential of the battery using a first terminal voltage of the battery and a second terminal voltage of the battery, wherein; the first terminal voltage of the battery is a terminal voltage at a first predetermined time relative to applying a pulse of the plurality of pulses of the signal to the terminals of the battery, and the second terminal voltage of the battery is a terminal voltage which correlates to an equilibrium voltage of the battery after applying the pulse of the plurality of pulses of the signal to the terminals of the battery; and 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 partial relaxation time of the battery and/or (ii) the overpotential of the battery. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification