Boost converter control device and control method of boost converter control device

A boost converter control device for driving a traction motor of an electrified vehicle, the boost converter control device comprising:

• a plurality of boost converters that is connected in parallel to each other to a secondary battery for supplying electric power to the traction motor and boosts a voltage of the secondary battery;
• and
• a control unit for controlling each of the boost converters, wherein:
• each of the boost converters is composed of a reactor and a switching element;
• and
• when warm-up of the secondary battery is required, the control unit
• performs first control for adjusting phases of at least two of the boost converters to be in the same phase, in response to a current value flowing through the secondary battery becoming larger than a predetermined threshold value, and
• performs second control for stopping an operation of a part of the boost converters, in response to the current value flowing through the secondary battery becoming equal to or less than the predetermined threshold value.