Device for controlling charging voltage
First Claim
1. A device for controlling a charging voltage, the device comprising:
- a voltage drop unit configured to drop a voltage by a preset magnitude;
a voltage comparison unit configured to compare a charging voltage of a battery with a first reference voltage and to output a path selection signal through an output terminal;
a first path configured to connect the battery to a charging power supply;
a second path configured to connect the battery to the charging power supply, with the voltage drop unit being interposed between the battery and the charging power supply; and
a path selector configured to select one from the first path and the second path according to the path selection signal,wherein the voltage comparison unit comprises;
a voltage comparator configured to receive the charging voltage and the first reference voltage, to output a third voltage when the charging voltage is lower than the first reference voltage, and to output a fourth voltage when the charging voltage is greater than the first reference voltage;
a first transistor comprising a control terminal connected to an output terminal of the voltage comparator, a first electrode terminal connected to the charging voltage, and a second electrode terminal connected to an output terminal of the voltage comparison unit; and
a second transistor comprising a control terminal connected to the output terminal of the voltage comparator, a first electrode terminal connected to a second reference voltage, and a second electrode terminal connected to the output terminal of the voltage comparison unit.
1 Assignment
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Accused Products
Abstract
A device for controlling a charging voltage, includes: a voltage drop unit configured to drop a voltage by a preset magnitude; a voltage comparison unit configured to compare a charging voltage of a battery with a first reference voltage and to output a path selection signal through an output terminal; a first path configured to connect the battery to a charging power supply; a second path configured to connect the battery to the charging power supply, with the voltage drop unit being interposed between the battery and the charging power supply; and a path selector configured to select one from the first path and the second path according to the path selection signal.
6 Citations
14 Claims
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1. A device for controlling a charging voltage, the device comprising:
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a voltage drop unit configured to drop a voltage by a preset magnitude; a voltage comparison unit configured to compare a charging voltage of a battery with a first reference voltage and to output a path selection signal through an output terminal; a first path configured to connect the battery to a charging power supply; a second path configured to connect the battery to the charging power supply, with the voltage drop unit being interposed between the battery and the charging power supply; and a path selector configured to select one from the first path and the second path according to the path selection signal, wherein the voltage comparison unit comprises; a voltage comparator configured to receive the charging voltage and the first reference voltage, to output a third voltage when the charging voltage is lower than the first reference voltage, and to output a fourth voltage when the charging voltage is greater than the first reference voltage; a first transistor comprising a control terminal connected to an output terminal of the voltage comparator, a first electrode terminal connected to the charging voltage, and a second electrode terminal connected to an output terminal of the voltage comparison unit; and a second transistor comprising a control terminal connected to the output terminal of the voltage comparator, a first electrode terminal connected to a second reference voltage, and a second electrode terminal connected to the output terminal of the voltage comparison unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for controlling a charging voltage, the method comprising:
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comparing via a voltage comparison unit a charging voltage of a battery with a first reference voltage and to output a path selection signal through an output terminal; and selecting via a path selector one from a first path and a second path according to the path selection signal, the first path being to connect the battery to a charging power supply, the second path being to connect the battery to the charging power supply with a voltage drop unit being interposed between the battery and the charging power supply, and the voltage drop unit being to drop the charging voltage by a preset magnitude, wherein the voltage comparison unit comprises; a voltage comparator configured to receive the charging voltage and the first reference voltage, to output a third voltage when the charging voltage is lower than the first reference voltage, and to output a fourth voltage when the charging voltage is greater than the first reference voltage; a first transistor comprising a control terminal connected to an output terminal of the voltage comparator, a first electrode terminal connected to the charging voltage, and a second electrode terminal connected to an output terminal of the voltage comparison unit; and a second transistor comprising a control terminal connected to the output terminal of the voltage comparator, a first electrode terminal connected to a second reference voltage, and a second electrode terminal connected to the output terminal of the voltage comparison unit.
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14. A system for controlling a charging voltage, the system comprising:
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means for comparing a charging voltage of a battery with a first reference voltage and to output a path selection signal through an output terminal; and means for selecting one from a first path and a second path according to the path selection signal, the first path being to connect the battery to a charging power supply, the second path being to connect the battery to the charging power supply with a voltage drop unit being interposed between the battery and the charging power supply, and the voltage drop unit being to drop the charging voltage by a preset magnitude, wherein the means for comparing the charging voltage of the battery comprises; a voltage comparator configured to receive the charging voltage and the first reference voltage, to output a third voltage when the charging voltage is lower than the first reference voltage, and to output a fourth voltage when the charging voltage is greater than the first reference voltage; a first transistor comprising a control terminal connected to an output terminal of the voltage comparator, a first electrode terminal connected to the charging voltage, and a second electrode terminal connected to an output terminal of the means for comparing the charging voltage; and a second transistor comprising a control terminal connected to the output terminal of the voltage comparator, a first electrode terminal connected to a second reference voltage, and a second electrode terminal connected to the output terminal of the means for comparing the charging voltage.
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Specification