Method of determining the state of charge of a battery of an electronic appliance
First Claim
1. A method, comprising:
- iteratively estimating a state of charge of a battery; and
generating a signal indicative of a state of charge of the battery based on the estimated state of charge of the battery, wherein the iteratively estimating compensates for drifts in operating parameters of the battery over time and at least one iteration of the estimating includes;
receiving a measured indication of an intensity of current supplied by the battery;
receiving a measured indication of a voltage supplied by the battery;
estimating, using processing circuitry, a first state of charge of the battery during the iteration based on an estimated first state of charge of a previous iteration and on the received indication of the intensity of current supplied by the battery;
estimating, using the processing circuitry, an intensity of current supplied by the battery based on the received indication of the voltage supplied by the battery and on a corrected state of charge of the battery of the previous iteration; and
calculating, using the processing circuitry, a corrected state of charge of the iteration by adding to the estimated first state of charge of the iteration a corrective term, the corrective term being based on a product of a first correction gain and a factor representative of a difference between the estimated intensity of current and the received indication of the intensity of current supplied by the battery, wherein the estimated intensity of current is based on the following equation;
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Accused Products
Abstract
A state of charge of a battery is estimated in several iterations, each iteration including: acquiring a measurement of intensity of current supplied by the battery, acquiring a measurement of voltage supplied by the battery, estimating a first state of charge of the battery based on a first estimated state of charge obtained upon a previous iteration and on the current intensity measurement, estimating a value of intensity of current supplied by the battery based on the voltage measurement and on a state of charge of the battery obtained upon the previous iteration, and calculating a corrected state of charge by adding to the first estimated state of charge a corrective term obtained by the product of a first correction gain multiplied by a factor representative of a difference between the estimated and measured current intensities.
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Citations
32 Claims
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1. A method, comprising:
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iteratively estimating a state of charge of a battery; and generating a signal indicative of a state of charge of the battery based on the estimated state of charge of the battery, wherein the iteratively estimating compensates for drifts in operating parameters of the battery over time and at least one iteration of the estimating includes; receiving a measured indication of an intensity of current supplied by the battery; receiving a measured indication of a voltage supplied by the battery; estimating, using processing circuitry, a first state of charge of the battery during the iteration based on an estimated first state of charge of a previous iteration and on the received indication of the intensity of current supplied by the battery; estimating, using the processing circuitry, an intensity of current supplied by the battery based on the received indication of the voltage supplied by the battery and on a corrected state of charge of the battery of the previous iteration; and calculating, using the processing circuitry, a corrected state of charge of the iteration by adding to the estimated first state of charge of the iteration a corrective term, the corrective term being based on a product of a first correction gain and a factor representative of a difference between the estimated intensity of current and the received indication of the intensity of current supplied by the battery, wherein the estimated intensity of current is based on the following equation; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 30)
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10. A device, comprising:
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a memory; and processing circuitry, which, in operation; iteratively estimates a state of charge of a battery; and generates a signal indicative of a state of charge of the battery based on the estimated state of charge of the battery, wherein the iteratively estimating compensates for drifts in operating parameters of the battery over time and at least one iteration of the estimating includes; receiving a measured indication of an intensity of current; receiving a measured indication of a voltage; estimating a first state of charge during the iteration based on an estimated first state of charge of a previous iteration and on the received indication of the intensity of current; estimating an intensity of current based on the received indication of the voltage and on a corrected state of charge of the previous iteration; and calculating a corrected state of charge of the iteration by adding to the estimated first state of charge of the iteration a corrective term, the corrective term being based on a product of a first correction gain and a factor representative of a difference between the estimated intensity of current and the received indication of the intensity of current, wherein the estimated intensity of current is based on the following equation; - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A device, comprising:
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a memory; and processing circuitry, which, in operation; iteratively estimates a state of charge of a battery; and generates a signal indicative of a state of charge of the battery based on the estimated state of charge of the battery, wherein the iteratively estimating compensates for drifts in operating parameters of the battery over time and at least one iteration of the estimating includes; receiving a measured indication of an intensity of current; receiving a measured indication of a voltage; estimating a first state of charge during the iteration based on an estimated first state of charge of a previous iteration and on the received indication of the intensity of current; estimating an intensity of current based on the received indication of the voltage and on a corrected state of charge of the previous iteration; and calculating a corrected state of charge of the iteration by adding to the estimated first state of charge of the iteration a corrective term, the corrective term being based on a product of a first correction gain and a factor representative of a difference between the estimated intensity of current and the received indication of the intensity of current, wherein; the processing circuitry comprises; at least one integrator; current intensity prediction circuitry; drift calculation circuitry; state of charge calculation circuity; and at least one adder; and the estimated intensity of current is based on the following equation; - View Dependent Claims (29)
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24. A non-transitory computer-readable memory medium whose contents cause one or more processing devices to, in operation:
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automatically iteratively estimate a state of charge of a battery; and generate a signal indicative of a state of charge of the battery based on the estimated state of charge of the battery, wherein the iteratively estimating compensates for drifts in operating parameters of the battery over time and at least one iteration of the estimating includes; receiving a measured indication of an intensity of current; receiving a measured indication of a voltage; estimating a first state of charge during the iteration based on an estimated first state of charge of a previous iteration and on the received indication of the intensity of current; estimating an intensity of current based on the received indication of the voltage and on a corrected state of charge of the previous iteration; and calculating a corrected state of charge of the iteration by adding to the estimated first state of charge of the iteration a corrective term, the corrective term being based on a product of a first correction gain and a factor representative of a difference between the estimated intensity of current and the received indication of the intensity of current, wherein the estimated intensity of current is based on the following equation; - View Dependent Claims (25, 26, 27, 28, 31, 32)
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Specification