Patent ID: 7456614
Filing Date: 2008-11-25
Classification: H01M,H02H,H02J,Y02E

Abstract:
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 signal which is supplied to a gate terminal of said discharge control FET; a protecting circuit to permit output of the signal that permits the discharge to said gate terminal when a voltage of said secondary battery is equal to or more than a lower limit value in a rated voltage range of said secondary battery; an output terminal of said one or more voltage converters connected to said gate terminal; a resistor connected between an output terminal of said protecting circuit from which said signal is outputted and the gate terminal of said discharge control FET; an anode of a diode connected to the output terminal of said one or more voltage converters; and a cathode connected to the gate terminal of said discharge control FET.