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 and charge the battery via charging circuitry, wherein the battery includes at least two terminals, the method comprising:
- (a) applying a signal to at least two terminals of the battery, wherein the signal injects charge into the battery;
(b) measuring a terminal voltage between terminals of the battery at a predetermined time relative to applying to the signal;
(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; and
(d) adapting one or more characteristics of a charging process for the battery, using the determined state of health of the battery, or a change therein.
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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
26 Claims
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1. A method to determine a state of health of a battery and charge the battery via charging circuitry, 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, wherein the signal injects charge into the battery; (b) measuring a terminal voltage between terminals of the battery at a predetermined time relative to applying to the signal; (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; and (d) adapting one or more characteristics of a charging process for the battery, using the determined state of health of the battery, or a change therein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. 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 monitoring circuitry, and configured to; (a) apply the signal to at least two terminals of the battery, wherein the signal injects charge into the battery; (b) measure a terminal voltage between terminals of the battery at a predetermined time relative to applying to the signal; (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; and (d) adapting one or more characteristics of a charging process for the battery based on the determined state of health of the battery, or a change therein. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification