Temporal voltage adaptive lithium battery charger
First Claim
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1. A method comprising:
- setting a digital-to-analog converter of a charger to a set voltage, wherein the set voltage is a maximum voltage allowable for a battery type;
determining an output voltage of the charger when the charger is operating at the set voltage;
determining an offset voltage by comparing the output voltage to the set voltage;
determining a cutoff voltage of a battery using the offset voltage and the open circuit voltage; and
adjusting the charger voltage adaptively in response to the cutoff voltage, wherein the adjusting prevents an over potential to the battery.
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Abstract
Systems and methods comprise setting a digital-to-analog converter of a charger to a set voltage. The set voltage is a maximum voltage allowable for a battery type. An output voltage of the charger is determined when the charger is operating at the set voltage. An offset voltage is determined by comparing the output voltage to the set voltage. A cutoff voltage of a battery is determined using the offset voltage and the open circuit voltage. Charger voltage is adaptively adjusted in response to the cutoff voltage, and the adjusting prevents an over potential to the battery.
944 Citations
1 Claim
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1. A method comprising:
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setting a digital-to-analog converter of a charger to a set voltage, wherein the set voltage is a maximum voltage allowable for a battery type; determining an output voltage of the charger when the charger is operating at the set voltage; determining an offset voltage by comparing the output voltage to the set voltage; determining a cutoff voltage of a battery using the offset voltage and the open circuit voltage; and adjusting the charger voltage adaptively in response to the cutoff voltage, wherein the adjusting prevents an over potential to the battery.
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Specification
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Current AssigneeiControl Networks, Inc. (Comcast Corporation)
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Original AssigneeiControl Networks, Inc. (Comcast Corporation)
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InventorsEgan, Ken, Kitchen, Jim
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Primary Examiner(s)Tso, Edward
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Application NumberUS14/204,628Time in Patent Office735 DaysField of Search320/128, 320/137, 320/157, 320/158, 320/159, 320/162, 320/163, 320/164US Class Current1/1CPC Class CodesH02J 7/00302 Overcharge protectionH02J 7/00309 Overheat or overtemperature...
