Method and apparatus for differentiating battery types

  • US 5,485,090 A
  • Filed: 02/11/1993
  • Issued: 01/16/1996
  • Est. Priority Date: 02/11/1993
  • Status: Expired due to Term
  • ×
    • Pin Icon | RPX Insight
    • Pin
First Claim
Patent Images

1. A method of determining a battery'"'"'s type from a plurality of candidate cell types, the battery having positive and negative output voltage terminals, the candidate cell types comprising a first cell type and a second cell type, the method comprising:

  • measuring the series resistance of the battery between the positive and negative output voltage terminals thereof;

    determining whether the series resistance of the battery lies within a predetermined range of series resistance values exhibited by batteries of both the first and second cell types;

    when the series resistance of the battery is determined to lie within .the predetermined range of series resistance values exhibited by batteries of both the first and second cell types, the method further comprising the steps of;

    measuring the voltage of the battery between the positive and negative output voltage terminals thereof;

    determining whether the voltage of the battery lies within a first predetermined range of voltages exhibited by batteries of the first cell type whose series resistance is within the predetermined range of series resistance values;

    determining whether the voltage of the battery lies within a second predetermined range of voltages exhibited by batteries of the second cell type whose series resistance is within the predetermined range of series resistance values;

    identifying the battery as having the first cell type if the series resistance is within the predetermined range of series resistance values and the voltage is within the first range of voltages; and

    identifying the battery as having the second cell type if the series resistance is within the predetermined range of series resistance values and the voltage is within the second range of voltages.

View all claims
  • 3 Assignments
    ×
    ×

    Thank you for your feedback

    ×
    ×