Cordless vacuum cleaner adopting overheating protection method

A cordless vacuum cleaner comprising:

• a cleaner main body;
• and
• a station,
• wherein the cleaner main body comprises:
• a first charge terminal configured to charge a battery of the cleaner main body with a direct current (DC) voltage transmitted from the station;
• a temperature sensor installed within a certain distance from the first charge terminal and configured to detect a temperature of the first charge terminal;
• at least one divider resistor configured to provide a voltage by dividing the DC voltage with the temperature sensor;
• and
• a first processor configured to control performing a cleaning function powered by the battery and performing an overheating prevention operation based on a voltage level of the voltage provided by the at least one divider resistor and the temperature sensor being greater than a certain first threshold voltage level, wherein the overheating prevention operation is an operation in which the first processor is further configured to drive the cleaner main body in association with separating the cleaner main body from the station by a certain distance or more, and
• the station comprises:
• a second charge terminal electrically connected to the first charge terminal and configured to charge the battery of the cleaner main body;
• and
• a power conversion device connected to the second charge terminal and configured to generate the DC voltage to charge the battery.

A method of preventing overheating of a charge terminal in a cordless vacuum cleaner, the method comprising:

• determining, by a temperature sensor, a voltage level corresponding to a temperature of the charge terminal while a station is electrically connected to a cleaner main body through the charge terminal, wherein determining the voltage level comprises dividing, by the temperature sensor, an input voltage with a divider resistor;
• determining whether the charge terminal is overheated, by comparing the voltage level with a certain threshold voltage level;
• and
• based on determining the charge terminal being is overheated, performing
• an operation of separating the cleaner main body from the station.