Method of determining the state of charge of a battery of an electronic appliance

A device, comprising:

• a memory;
• and
• processing circuitry, which, in operation, iteratively estimates a state of charge of a battery, at least one iteration of the estimating including:
• receiving an indication of an intensity of current;
• receiving an 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.

A non-transitory computer-readable memory medium whose contents cause one or more processing devices to, in operation, iteratively estimate a state of charge of a battery, at least one iteration of the estimating including:

• receiving an indication of an intensity of current;
• receiving an 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.