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Automotive jump starter with polarity detection and current routing circuitry

  • US 20050110467A1
  • Filed: 11/03/2004
  • Published: 05/26/2005
  • Est. Priority Date: 11/03/2003
  • Status: Abandoned Application
First Claim
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1. A circuit configured for use in an automobile jump-starter having an internal battery comprising:

  • a bridge rectifier configured to provide correct polarity to a regulator, said bridge rectifier connected to a regulator;

    said regulator connected to a current leakage protection circuit and to a microcontroller;

    said current leakage protection circuit connected to said internal battery, said current leakage protection circuit configured to provide a ground for voltage reference and to prevent current from being drawn from said internal battery when said jump-starter unit is not in use, said current leakage protection device further comprising a switched capacity voltage converter; and

    a polarity detection circuit, said polarity detection circuit configured to provide either a high or a low input to a microcontroller;

    said microcontroller having at least two analog to digital inputs and a signal creating portion configured to direct a signal to said current leakage protection circuit, said microcontroller configured to detect polarity and a minimum amount of voltage;

    to measure amount of voltage, and to determine whether said current leakage protection circuit should be shut off according to said measured amount of voltage and a pre-selected criteria.

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