Method and circuitry to adaptively charge a battery/cell using the state of health thereof

摘要

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.

主权项

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.