A battery management system comprising: a plurality of voltage detection integrated circuits; and a battery controller configured to control charge and discharge of a high voltage battery based on a cell voltage detection result received from the voltage detection integrated circuits, and each of the voltage detection integrated circuits includes: a cell voltage detection circuit configured to detect a voltage of at least one corresponding cell among a plurality of cells constituting the high voltage battery; first and second interfaces configured to communicate between different voltage detection integrated circuits in the detection integrated circuits, such that the first terminals of the voltage detection integrated circuit are connected with the second terminals of another voltage detection integrated circuit connected through the first interface among the plurality of voltage detection integrated circuits; a plurality of first terminals connected with a first power source which supplies an operation voltage of the cell voltage detection circuit and the first interface, wherein the first power source is supplied from the corresponding at least one cell; a plurality of second terminals configured to receive an operation voltage of a different voltage detection integrated circuit connected therewith through the second interface; and characterized in that each of the voltage detection integrated circuit further includes a level shifter configured to level-shift a voltage supplied from the first power source to a level of the operation voltage inputted through the second terminals, and the level shifter is further configured to supply the level-shifted voltage as an operation voltage of the second interface. a plurality of voltage detection integrated circuits; and a battery controller configured to control charge and discharge of a high voltage battery based on a cell voltage detection result received from the voltage detection integrated circuits, and each of the voltage detection integrated circuits includes: a cell voltage detection circuit configured to detect a voltage of at least one corresponding cell among a plurality of cells constituting the high voltage battery; first and second interfaces configured to communicate between different voltage detection integrated circuits in the detection integrated circuits, such that the first terminals of the voltage detection integrated circuit are connected with the second terminals of another voltage detection integrated circuit connected through the first interface among the plurality of voltage detection integrated circuits; a plurality of first terminals connected with a first power source which supplies an operation voltage of the cell voltage detection circuit and the first interface, wherein the first power source is supplied from the corresponding at least one cell; a plurality of second terminals configured to receive an operation voltage of a different voltage detection integrated circuit connected therewith through the second interface; and characterized in that each of the voltage detection integrated circuit further includes a level shifter configured to level-shift a voltage supplied from the first power source to a level of the operation voltage inputted through the second terminals, and the level shifter is further configured to supply the level-shifted voltage as an operation voltage of the second interface. a cell voltage detection circuit configured to detect a voltage of at least one corresponding cell among a plurality of cells constituting the high voltage battery; first and second interfaces configured to communicate between different voltage detection integrated circuits in the detection integrated circuits, such that the first terminals of the voltage detection integrated circuit are connected with the second terminals of another voltage detection integrated circuit connected through the first interface among the plurality of voltage detection integrated circuits; a plurality of first terminals connected with a first power source which supplies an operation voltage of the cell voltage detection circuit and the first interface, wherein the first power source is supplied from the corresponding at least one cell; a plurality of second terminals configured to receive an operation voltage of a different voltage detection integrated circuit connected therewith through the second interface; and characterized in that each of the voltage detection integrated circuit further includes a level shifter configured to level-shift a voltage supplied from the first power source to a level of the operation voltage inputted through the second terminals, and the level shifter is further configured to supply the level-shifted voltage as an operation voltage of the second interface.