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Battery charger control device

  • US 4,198,593 A
  • Filed: 08/19/1977
  • Issued: 04/15/1980
  • Est. Priority Date: 08/19/1977
  • Status: Expired due to Term
First Claim
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1. A battery charge control device for use with a battery charger operatively connected to a source of alternating power, said device comprising a pair of terminals;

  • a relay having a coil and a pair of normally open relay contacts, said contacts being interposed between the battery charger and the source of power in such manner that power will flow from the source to the charger when the coil is energized;

    transistor switching means operatively connected to the terminals and to the coil and adapted for going into conduction and permitting energizing current to flow through the coil when a voltage is applied across the terminals;

    a capacitor;

    pulse generating means operatively connected to the capacitor for developing a charge in the capacitor when a voltage is applied across the terminals, said pulse generating means integrally including timing means for regulating the period of time required to bring the capacitor to a charged condition;

    cutoff means for turning off the transistor switching means and stopping the flow of current through the coil when the capacitor has developed a predetermined charge;

    and sensing means for monitoring the voltage across the terminals and for applying a charge to the capacitor independently of the pulse generating means when the voltage presented to the terminals exceeds a predetermined value.

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