Floor cleaning system

A floor cleaning system, comprising:

• a floor cleaning machine including:
• a cleaning head movable over a surface to be cleaned and having a rotatable brush roller;
• a cleaning fluid supply unit arranged for supplying a cleaning fluid to the brush roller and comprising a supply tank for storing the cleaning fluid;
• a dirty liquid recovery unit for recovering dirty liquid and debris from the surface to be cleaned and comprising a recovery tank for storing the dirty liquid;
• a rechargeable battery configured to power energy-consuming components of the floor cleaning machine;
• a first control unit controlling the floor cleaning machine to perform cleaning operations and self-cleaning operations;
• and
• a charging plug electrically coupled to the rechargeable battery;
• and a self-cleaning station including:
• a station body configured to receive and hold at least a portion of the base;
• a power plug provided on the station body and having ability to be electrically coupled to an external power source;
• a second control unit provided on the station body;
• a self-cleaning switch operably provided on the station body and electrically coupled with the second charging interface;
• and
• a charging port configured for electrical connection to the charging plug and coupled to the second control unit;
• wherein the first control unit is in signal communication with the second control unit via an electrical pathway passing through the charging plug and the charging port when the charging plug is electrically contacted with the charging port, such that the self-cleaning operation is performed in response to an indication that the self-cleaning switch has been turned on.