Battery pack having boosting charge function and method thereof
First Claim
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1. A method of charging a battery pack, the battery pack comprising at least one battery cell, the method comprising:
- comparing a battery cell voltage to a first voltage;
comparing the battery cell voltage to a second voltage that is greater than the first voltage; and
controlling a current amplifying unit coupled to the at least one battery cell to amplify a current from a charger to the at least one battery cell if the battery cell voltage is between the first voltage and the second voltage, wherein the current amplifying unit comprises;
a first transistor and a second transistor each comprising a control electrode, a first electrode and a second electrode, wherein the first electrode of the first transistor is coupled to a ground reference, the first electrode of the second transistor is coupled to the charger, and the second electrode of the second transistor is coupled to the at least one battery cell; and
a capacitor coupled between the control electrode of the first transistor and the second electrode of the first transistor, wherein controlling the current amplifying unit coupled to the at least one battery cell to amplify the current from the charger to the at least one battery cell if the battery cell voltage is between the first voltage and the second voltage comprises applying a control signal to the control electrode of the first transistor.
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Abstract
A method of charging a battery pack, the battery pack including at least one battery cell. The method includes comparing a battery cell voltage to a first voltage; comparing the battery cell voltage to a second voltage that is greater than the first voltage; and controlling a current amplifying unit coupled to the at least one battery cell to amplify a current from a charger to the at least one battery cell if the battery cell voltage is between the first voltage and the second voltage.
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Citations
18 Claims
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1. A method of charging a battery pack, the battery pack comprising at least one battery cell, the method comprising:
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comparing a battery cell voltage to a first voltage; comparing the battery cell voltage to a second voltage that is greater than the first voltage; and controlling a current amplifying unit coupled to the at least one battery cell to amplify a current from a charger to the at least one battery cell if the battery cell voltage is between the first voltage and the second voltage, wherein the current amplifying unit comprises; a first transistor and a second transistor each comprising a control electrode, a first electrode and a second electrode, wherein the first electrode of the first transistor is coupled to a ground reference, the first electrode of the second transistor is coupled to the charger, and the second electrode of the second transistor is coupled to the at least one battery cell; and a capacitor coupled between the control electrode of the first transistor and the second electrode of the first transistor, wherein controlling the current amplifying unit coupled to the at least one battery cell to amplify the current from the charger to the at least one battery cell if the battery cell voltage is between the first voltage and the second voltage comprises applying a control signal to the control electrode of the first transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A battery pack comprising:
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at least one battery cell; a current amplifying unit coupled to the at least one battery cell and configured to amplify a current from a charger to the at least one battery cell, wherein the current amplifying unit comprises; a first transistor and a second transistor each comprising a control electrode, a first electrode and a second electrode, wherein the first electrode of the first transistor is coupled to a ground reference, the first electrode of the second transistor is coupled to the charger, and the second electrode of the second transistor is coupled to the at least one battery cell, and a capacitor coupled between the control electrode of the first transistor and the second electrode of the first transistor; and a control unit configured to apply a control signal to the control electrode of the first transistor in accordance with a voltage of the at least one battery cell for the current amplifying unit to amplify the current from the charger to the at least one battery cell if the voltage of the at least one battery cell is between a first voltage and a second voltage greater than the first voltage. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A battery pack comprising:
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at least one battery cell; and a current amplifying unit coupled to the at least one battery cell and configured to amplify a current from a charger to the at least one battery cell, wherein the current amplifying unit comprises; a first transistor and a second transistor each comprising a first electrode, a second electrode, and a control electrode, wherein the first transistor and the second transistor are coupled in series between the charger and the at least one battery cell; and a voltage regulator comprising an input terminal coupled to the second electrode of the first transistor and an output terminal coupled to the control electrode of the second transistor.
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18. A battery pack comprising:
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at least one battery cell; and a current amplifying unit coupled to the at least one battery cell and configured to amplify a current from a charger to the at least one battery cell, wherein the current amplifying unit comprises; a first transistor and a second transistor each comprising a first electrode, a second electrode, and a control electrode, wherein the first transistor and the second transistor are coupled in series between and the at least one battery cell; and a voltage regulator comprising an input terminal coupled to the control electrode of the second transistor and an output terminal coupled to the second electrode of the second transistor.
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Specification