Switch Control Apparatus
AssigneeLG Chem, Ltd.
InventorsJun-Hyok Lee, Seok-Jun Lee
Life of this patent
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Abstract
Disclosed is a switch control apparatus capable of effectively controlling a switch during a process of controlling the switch provided in a battery pack. When the switch is shifted from a closed state to an open state, the current caused by the generated counter electromotive force is quickly released, thereby quickly shifting the switch to turn on or off. In addition, since the voltage applied to the control unit falls within the rated voltage range, the stability of the switch control circuit may be enhanced.
Claims10
A switch control apparatus for controlling an opening/closing operation of a switch supplied with a power from a voltage input source, the switch control apparatus comprising:
- a freewheeling diode electrically connected to the switch in parallel so that a current flows toward a positive electrode terminal of the switch;
- a Zener diode electrically connected to the freewheeling diode in series;
- a field effect transistor (FET) provided between an input terminal of the voltage input source and a positive electrode terminal of the switch, and configured to receive an input voltage from the input terminal and transmit the input voltage to the positive electrode terminal of the switch;
- a control unit electrically connected to the FET to transmit a signal to the FET for controlling an opening/closing operation of the switch;
- and
- a resistor provided on a connection path between the control unit and the path along which the input voltage is supplied from the input terminal of the voltage input source to the switch, to distribute a voltage applied to the control unit.
Dependencies are inferred from the claim text.