×

BATTERY PACK

  • US 20090051323A1
  • Filed: 10/23/2008
  • Published: 02/26/2009
  • Est. Priority Date: 10/27/2003
  • Status: Active Grant
First Claim
Patent Images

1. A battery pack having a secondary battery therein, comprising:

  • one or more voltage converters;

    a discharge control FET to permit or shut off a discharge of said secondary battery in accordance with a first signal which is supplied to a gate terminal of said discharge control FET;

    a charge control FET to permit or shutoff a charge of said secondary battery in accordance with a second signal which is supplied to a gate terminal of said charge control FET;

    a protecting circuit to permit output of the first signal that permits the discharge to said gate terminal of said discharge control FET when a battery voltage of said secondary battery is equal to or more than a lower limit value in a rated voltage range of said secondary battery or to permit output of the second signal that permits the discharge to said gate terminal of said charge control FET when the voltage of said secondary battery is equal to or less than an upper limit value in the rated voltage range of said secondary battery; and

    an output terminal of said voltage converter connected to at least either the gate terminal of said discharge control FET or the gate terminal of said charge control FET.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×