SYSTEM FOR CHARGING BATTERY
First Claim
1. A battery charging system comprising:
- an energy harvester configured to generate power;
an input capacitor configured to store the power;
a first DC-DC converter configured to receive the power and perform maximum power point tracking by receiving the power to extract the maximum power;
a storage capacitor configured to store the maximum power;
a second DC-DC converter configured to convert the maximum power to a predetermined rechargeable voltage; and
a battery configured to store the power converted to the rechargeable voltage,wherein the second DC-DC converter controls to prevent a low voltage from being inputted to the capacitor and to prevent energy from being consumed uselessly in the storage capacitor while converting the voltage.
1 Assignment
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Accused Products
Abstract
A battery charging system is provided. The battery charging system comprises an energy harvester configured to generate power; an input capacitor configured to store the power; a first DC-DC converter configured to perform maximum power point tracking by receiving the power to extract the maximum power; a storage capacitor configured to store the maximum power; a second DC-DC converter configured to convert the maximum power to a predetermined rechargeable voltage; and a battery configured to store the power converted to the rechargeable voltage, wherein the second DC-DC converter controls to prevent a low voltage from being inputted to the capacitor and to prevent energy from being consumed uselessly in the storage capacitor while converting the voltage.
18 Citations
9 Claims
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1. A battery charging system comprising:
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an energy harvester configured to generate power; an input capacitor configured to store the power; a first DC-DC converter configured to receive the power and perform maximum power point tracking by receiving the power to extract the maximum power; a storage capacitor configured to store the maximum power; a second DC-DC converter configured to convert the maximum power to a predetermined rechargeable voltage; and a battery configured to store the power converted to the rechargeable voltage, wherein the second DC-DC converter controls to prevent a low voltage from being inputted to the capacitor and to prevent energy from being consumed uselessly in the storage capacitor while converting the voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A DC-DC converter which is to charge a battery in a battery charging system, the DC-DC converter comprising:
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a storage capacitor configured to store input power; a power regulation unit configured to raise a voltage to the rechargeable voltage which is higher than the voltage of the battery by receiving the power stored in the storage capacitor and output the raised power; an input switch configured to perform an on-off operation to control power input to the power regulation unit by being connected to an input terminal of the power regulation unit; an output switch configured to perform an on-off operation to control power output from the power regulation unit by being connected between an output terminal of the power regulation unit and the battery; and an input/output control unit configured to output a control signal to the input switch and the output switch based on an input voltage and an output voltage of the power regulation unit to control an on-off operation of the input switch and the output switch.
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9. A battery charging system comprising:
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more than one energy harvester configured to generate power; more than one input capacitor configured to store the power by being corresponded to each energy harvester; more than one first DC-DC converter configured to perform maximum power point tracking by receiving the power to extract the maximum power by being corresponded to each energy harvester; more than one storage capacitor configured to store the maximum power by being corresponded to each energy harvester; an energy accumulator configured to add the power stored in the more than one storage capacitor to one accumulate power; a storage capacitor configured to store the accumulate power; a second DC-DC converter configured to convert the accumulate power to a predetermined rechargeable voltage; and a battery configured to store the power converted to the rechargeable voltage, wherein the second DC-DC converter controls to prevent a low voltage from being inputted to the capacitor and to prevent energy from being consumed uselessly in the storage capacitor while converting the voltage.
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Specification