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Charging apparatus and charging method

  • US 20040008007A1
  • Filed: 05/01/2003
  • Published: 01/15/2004
  • Est. Priority Date: 05/15/2002
  • Status: Active Grant
First Claim
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1. A charging apparatus comprising:

  • first and second input terminals to which power voltage sources are connected;

    first and second semiconductor devices for power control in which said first and second input terminals are connected to input electrodes, respectively;

    a secondary battery to which output electrodes of said first and second semiconductor devices for power control are connected in common and which is connected between said common connection electric potential point and a reference electric potential point;

    a control circuit for controlling a terminal voltage and a charge current of said secondary battery to desired values; and

    switching signal generating means for detecting voltages which are generated at the input electrodes of said first and second semiconductor devices for power control and generating a switching signal for turning on a circuit between the input and output electrodes of said semiconductor device for power control at which the voltage has been detected.

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