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BATTERY-CHARGING SYSTEM WITH VOLTAGE REFERENCE MEANS WITH TWO REFERENCE LEVELS

  • US 3,585,482 A
  • Filed: 03/25/1969
  • Issued: 06/15/1971
  • Est. Priority Date: 03/25/1969
  • Status: Expired due to Term
First Claim
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1. A battery-charging control system connectable between a source of charging current and a battery which may have currentconsuming equipment connected thereto, the combination cOmprising:

  • a power-controlling device connected between said battery and said source of charging current so that said battery receives current flow from said power controlling device and varies in voltage value;

    control circuit means for controlling said power-controlling device to control the battery voltage in accordance with the value established by a voltage reference means, voltage reference means controlling said control circuit means and having a first portion establishing a first reference value related to a first battery voltage and a second portion establishing a second reference value related to a preselected higher battery voltage;

    battery voltage-sensing circuit means coupled to said voltage reference means, voltage control circuit means coupled to said voltage reference means and responsive to said battery voltage-sensing circuit means for coupling said second portion in effective circuit relationship in the voltage reference means whereby said control circuit means is selectively controlled at said second reference value upon the battery voltage falling below the first battery voltage value and is maintained at said second reference value until said battery attains a preselected higher voltage value; and

    additional voltage control circuit means responsive to said battery voltage-sensing circuit means for decoupling said second portion and coupling only said first portion in effective circuit relationship in said voltage reference means upon the battery attaining the preselected higher voltage value whereby said first reference value selectively controls operation of said control circuit means as long as the battery voltage does not fall below said first voltage reference value.

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