Circuit for selecting and designating a master battery pack in a computer system

  • US 5,717,937 A
  • Filed: 03/04/1996
  • Issued: 02/10/1998
  • Est. Priority Date: 03/04/1996
  • Status: Expired due to Term
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First Claim
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1. A battery pack for providing power to a host computer system with battery pack arbitration circuitry, said battery pack comprising:

  • battery pack terminals;

    battery cells;

    discharge enabling circuitry coupled to said battery pack terminals and said battery cells, said discharge enabling circuitry when enabled permitting discharge of said battery cells through said battery pack terminals and otherwise blocking discharge of said battery cells; and

    data processing circuitry electrically coupled to said discharge enabling circuitry, said data processing circuitry comprising;

    a serial bus interface for communicating battery status information to the battery pack arbitration circuitry of the host computer system and for receiving selection commands from the battery pack arbitration circuitry of the host computer system;

    a master battery signal line interface for communicating a master battery signal;

    logic responsive to said master battery signal and responsive to selection commands received over said serial bus interface for controlling said discharge enabling circuitry; and

    logic for selectively providing said master battery signal responsive to selection commands received over said serial bus interface.

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