Apparatus for controlling power and method thereof

A device for controlling power of an aircraft, the device comprising:

• at least one first battery;
• a second battery having a lower power density and higher energy density than the at least one first battery;
• at least one lift motor connected, via a first electrical path, to the at least one first battery;
• a cruise motor connected, via a second electrical path, to the second battery;
• a capacitor connected to the cruise motor;
• and
• a power control circuit configured to control the at least one first battery, the second battery, the at least one lift motor, and the cruise motor, wherein the power control circuit includes:
• the first electrical path, wherein the first electrical path comprises at least one of:
• at least one first main relay,
• a first pre-charge relay,
• a first pre-charge resistor, or
• a first balance relay;
• the second electrical path, wherein the second electrical path comprises at least one of:
• at least one second main relay,
• a second pre-charge relay, or
• a second pre-charge resistor;
• and
• a third electrical path between the second battery and the at least one lift motor, the third electrical path comprising at least one of:
• a DC/DC converter, or
• a third main relay,
• wherein, based on a time when the aircraft takes off or lands,
• the at least one first battery is configured to supply output power to the at least one lift motor via the at least one first main relay, or
• the second battery is configured to supply output power to the at least one lift motor via at least one of the third main relay or the DC/DC converter,
• wherein, based on the aircraft entering a cruise state after completing takeoff,
• the cruise motor is configured to be driven using an output power of the capacitor charged by the second battery,
• wherein, based on a time before the aircraft takes off,
• the at least one first battery and the second battery are connected in parallel to supply output power to the at least one lift motor,
• wherein, based on a value of the output power of the at least one first battery not satisfying a first threshold value, or a value of output power of the device for landing the aircraft not satisfying a second threshold value, the output power of the at least one first battery and the output power of the second battery are supplied to the at least one lift motor,
• wherein the DC/DC converter is configured to convert the output power of the second battery to be equal to the output power of the at least one first battery, and
• wherein the at least one first battery comprises a plurality of first batteries, and the first balance relay is configured to equalize output voltages among the plurality of first batteries prior to connecting the plurality of first batteries and the second battery in parallel to supply output power to the at least one lift motor.