Driving control device of relay for battery pack

A driving control device for a relay for a battery pack, comprising:

• a buck-boost converter configured to receive a voltage from an auxiliary battery, and output a buck-boost voltage;
• a feedback control circuit electrically connected to the buck-boost converter, and configured to transfer a feedback voltage to the buck-boost converter to control the buck-boost voltage output from the buck-boost converter;
• and
• a relay control circuit configured to apply or block the buck-boost voltage to a relay electrically connected to at least one of a positive electrode terminal or a negative electrode terminal of a main battery,
• wherein the buck-boost converter is configured to output the buck-boost voltage according to the feedback voltage, and
• wherein the buck-boost voltage has a smaller sustaining voltage for maintaining the relay in an on state than a first reference voltage for turning on the relay.