A battery charging circuit and method
AssigneePetalite Limited
InventorsStavros Pressas, Leigh Purnell
Life of this patent
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Abstract
A method of charging a battery, the method comprising the steps of: providing a charging current to the battery; determining a property of the battery substantially continuously during charging; and varying a property of the charging current in dependence on the determined property of the battery.
Claims30
A method of monitoring the internal impedance of a battery during charging, the method comprising:
- providing, by a charging system, a time varying current to the battery;
- measuring, by the charging system, a change in the current substantially continuously;
- measuring, by the charging system, a corresponding change in a voltage at a charging terminal coupled to the battery substantially continuously;
- and
- determining, by the charging system, an internal impedance of the battery based on the change in current and the corresponding change in voltage.
8-53. (canceled)
A battery charger for providing a charging current to a battery, the battery charger being adapted to provide a current with an oscillating waveform that has waveform minima are at or near 0 amps.
(canceled)
A method of charging a battery, the method comprising
- converting an alternating polarity output of a power source to a charging current;
- and
- providing the charging current to the battery, wherein the current has an oscillating waveform, and the waveform has waveform minima at or near 0 amps.
61-92. (canceled)
Dependencies are inferred from the claim text.