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Method of detecting battery pack type and mobile electronic device

  • US 6,577,883 B1
  • Filed: 07/26/2000
  • Issued: 06/10/2003
  • Est. Priority Date: 07/26/1999
  • Status: Expired due to Fees
First Claim
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1. A method of detecting the type of a battery pack in a mobile electronic device, comprising the steps of:

  • (a) providing a first battery pack connectable to a body of a mobile electronic device;

    said first battery pack having a battery cell, a first terminal connected to a high-potential side terminal of said cell, a second terminal connected to a low-potential side terminal of said cell, a third terminal, and a temperature detection element connected across said second and third terminals;

    (b) providing a second battery pack connectable to said body of said device;

    said second battery pack being different in characteristic from said first battery pack;

    said second battery pack having a battery cell, a first terminal connected to a high-potential side terminal of said cell, a second terminal connected to a low-potential side terminal of said cell, a third terminal, and a temperature detection element connected across said first and second terminals;

    (c) providing said body of said device with a fourth terminal connectable to said first terminal of said first or second battery pack, a fifth terminal connectable to said second terminal of said first or second battery pack, a sixth terminal connectable to said third terminal of said first or second battery pack;

    said body of the device having a resistive voltage divider circuit connected among said fourth, fifth, and sixth terminals;

    (d) connecting said first or second battery pack to said body of said device in such a way that said fourth, fifth, and sixth terminals of said body of said device are connected to said first, second, and third terminals of said first or second battery pack, respectively;

    (e) detecting an output voltage of said resistive voltage divider of said body of said device, generating a detection result; and

    (f) judging whether said first or second battery pack is connected to said body of said device based on said detection result.

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