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Constant current, fast and float rate, variable hysteresis battery charger

  • US 4,686,443 A
  • Filed: 07/25/1986
  • Issued: 08/11/1987
  • Est. Priority Date: 07/25/1986
  • Status: Expired due to Fees
First Claim
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1. A battery charging circuit connected to a voltage source and the terminals of a battery for maintaining a charge on the battery comprising:

  • input means connected to said voltage source;

    current regulating means connected to said input means for providing a constant current output to said battery;

    resistive means connected to said regulating means for selectively setting charging rate currents provided to said battery by said regulating means;

    switching means connected to said resistive means for controlling the operation of said resistive means;

    means for sensing the state of charge of said battery connected across the terminals of said battery; and

    integrated buffer circuit means connected between sensing means and said switching means to control the operation of said switching means in response to the state of battery charge sensed by said sensing means.

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