BATTERY MANAGEMENT DEVICE AND INTEGRATED CIRCUIT

To improve reliability in balancing while suppressing power consumption during balancing. A battery management device includes cell cons and that perform balancing for adjusting voltages of a plurality of battery cells that are secondary batteries, and a control unit that controls the cell cons and The cell con includes the main timer that measures the elapsed time for stopping the cell con and the stop management unit that stops the cell con when the main timer is abnormal. In the battery management device the battery cell that supplies power to the main timer and the stop management unit and the lead storage battery that supplies power to the control unit are power supplies different from each other.