Systems and methods for simultaneously charging a battery with multiple power sources
First Claim
1. A battery charging system, comprising:
- a controller configured to couple to a battery gauge of a battery and a plurality of power converters, so as to supply power to a terminal of the battery,wherein the controller is configured to;
assign a priority level to each of the plurality of power converters, andrepeatedly update a servo target at a first rate in accordance with a first feedback control loop process that is based on a comparison between one or more profile target values of a charging profile and one or more battery metrics,wherein the one or more battery metrics are measured by the battery gauge,wherein the plurality of converters are configured to simultaneously charge the battery, in accordance with their respective assigned priority level and the servo target.
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Abstract
Systems and methods for power management are disclosed herein. In one disclosed embodiment, a battery charging system includes a battery charger for simultaneously charging a battery (and/or providing power to a system load) with multiple power sources, using a closed-loop charging servo target based on measurements taken by one or more gauges. In some embodiments, the multiple power sources may be utilized simultaneously according to a charging profile that specifies, e.g., one or more battery charging parameters, as well as according to determined priority levels for one or more of the multiple power sources coupled to the battery. In some embodiments, the priority level of a given power source is not fixed; rather, the priority level for the given power source may change based upon the characteristics of the given power source. In some embodiments, the priority levels for the multiple power sources are implemented using cascaded voltage target values.
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Citations
26 Claims
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1. A battery charging system, comprising:
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a controller configured to couple to a battery gauge of a battery and a plurality of power converters, so as to supply power to a terminal of the battery, wherein the controller is configured to; assign a priority level to each of the plurality of power converters, and repeatedly update a servo target at a first rate in accordance with a first feedback control loop process that is based on a comparison between one or more profile target values of a charging profile and one or more battery metrics, wherein the one or more battery metrics are measured by the battery gauge, wherein the plurality of converters are configured to simultaneously charge the battery, in accordance with their respective assigned priority level and the servo target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method performed by a battery charging system, comprising:
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assigning a priority level to a plurality of power converters; measuring, by a battery gauge of a battery, one or more battery metrics of the battery; repeatedly updating a servo target at a first rate, in accordance with a first feedback control loop process that is based, at least in part, on a comparison between one or more profile target values of a charging profile and the one or more battery metrics; and repeatedly adjusting the plurality of power converters that supply power to a terminal of the battery, wherein the plurality of power converters are configured to simultaneously charge the battery, in accordance with their respective assigned priority level and the servo target. - View Dependent Claims (15, 16, 17, 18)
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19. A portable electronic device, comprising:
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a battery; and a controller, wherein the controller is configured to; couple to a battery gauge, wherein the battery gauge is configured to measure one or more battery metrics of the battery; couple to a plurality of power converters, wherein the plurality of power converters are configured to supply power to a terminal of the battery; assign a priority level to each of the plurality of power converters; and repeatedly update a servo target of a first feedback control loop at a first rate, based on a comparison between a charging profile and the one or more battery metrics determined by the battery gauge, wherein the plurality of converters are configured to simultaneously charge the battery, in accordance with their respective assigned priority level and the servo target. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification