The present invention provides a battery management system capable of preventing over-discharge of a battery. The battery management system includes: one or more battery cells included in one battery pack, and including a negative electrode plate and a positive electrode plate; a negative electrode output terminal and a positive electrode output terminal for outputting voltages of the negative electrode plate and the positive electrode plate, respectively; a battery management module included in the battery pack, and configured to electrically connect and block the battery cell to and from the positive output terminal; and a starting switch provided outside the battery pack, and having one end electrically connected to the positive electrode plate and an opposite other end electrically connected to the battery management module so as to control starting of the battery management module. In the case, when the starting switch is turned on, the battery management module is turned on to operate so as to output a voltage of the battery cell through the positive output terminal when a residual voltage of the battery cell is greater than or equal to a threshold value, and maintained in an off-state when the residual voltage of the battery cell is less than the threshold value. The present invention provides a battery management system capable of preventing over-discharge of a battery. The battery management system includes: one or more battery cells included in one battery pack, and including a negative electrode plate and a positive electrode plate; a negative electrode output terminal and a positive electrode output terminal for outputting voltages of the negative electrode plate and the positive electrode plate, respectively; a battery management module included in the battery pack, and configured to electrically connect and block the battery cell to and from the positive output terminal; and a starting switch provided outside the battery pack, and having one end electrically connected to the positive electrode plate and an opposite other end electrically connected to the battery management module so as to control starting of the battery management module. In the case, when the starting switch is turned on, the battery management module is turned on to operate so as to output a voltage of the battery cell through the positive output terminal when a residual voltage of the battery cell is greater than or equal to a threshold value, and maintained in an off-state when the residual voltage of the battery cell is less than the threshold value.
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