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High efficiency charging apparatus using switching arrangement and charging/discharging

  • US 9,728,996 B2
  • Filed: 07/27/2012
  • Issued: 08/08/2017
  • Est. Priority Date: 01/28/2010
  • Status: Active Grant
First Claim
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1. A high efficiency charging apparatus, comprising:

  • a power supply which is a source for supplying electricity for charging a battery;

    a speed setting unit for setting an oscillating frequency and outputting an electrical self-oscillating signal having a frequency corresponding to the oscillating frequency;

    a switching unit having a plurality of switches which are driven by the electrical self-oscillating signal supplied from the speed setting unit;

    a power transmitting unit for driving a current in the power supply to a capacitor multiple times in one charging cycle according to a drive state of the plurality of switches of the switching unit to charge the capacitor first and then discharging the current charged in the capacitor to the battery at one time in the charging cycle according to the drive state of the plurality of switches in order to supply the current to the battery, wherein the battery is charged by repeating the charging cycle multiple times; and

    wherein the power transmitting unit comprises;

    a first field effect transistor (FET) which is driven by a first switching signal through a first switch of the switching unit to form a closed loop for primarily supplying the electric power of the power supply to charge the capacitor and is driven by a second switching signal through a second switch of the switching unit and a condenser to form a closed loop for secondarily supplying the electric power of the power supply to charge the capacitor;

    a second FET which is driven by a third switching signal through a third switch of the switching unit to form a closed loop for tertiary supplying the electric power of the power supply to charge the capacitor; and

    a third FET which is driven by a fourth switching signal through a fourth switch of the switching unit to form a closed loop connecting between the capacitor and the battery and between the battery and the power supply.

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