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Method and apparatus for nonaqueous second battery charging

  • US 20040195996A1
  • Filed: 07/25/2003
  • Published: 10/07/2004
  • Est. Priority Date: 07/30/2002
  • Status: Active Grant
First Claim
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1. A battery charging apparatus which charges a second battery, comprising:

  • a voltage detecting circuit for detecting a battery voltage of said second battery and for outputting a signal in response to said detected battery voltage;

    a current detecting circuit for detecting a battery current supplied to said second battery and for outputting a signal in response to said detected battery current;

    a charging circuit for controlling a current supply to said second battery to charge said second battery such that said battery voltage detected by said voltage detecting circuit becomes substantially equal to a first pre-set battery voltage in response to a first input control signal applied thereto and also such that a charging current detected by the current detecting circuit becomes substantially equal to a charging current predetermined in response to a second input control signal applied thereto; and

    a charge control circuit that instructs said charging circuit by sending said first and said second input control signals applied to said charging circuit to set said battery voltage and said charging current in response to a voltage indicated by said signal outputs from said voltage detecting circuit and said current detecting circuits respectively.

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