The unmanned forklift in ports and other applications is increasing. In ports, especially seaports, salt spray can easily corrode metal contacts. When the several kilowatts charging power is applied to the corroded metal contacts, it may cause ignition and damage the internal circuit of the charging pile and the unmanned forklift; more seriously, fire may be occurred.
Similarly, under the condition that no power supply plugged or unplugged, the autonomous charging based on wireless charging becomes necessary, which enables the unmanned sweeper to safely charge under all working conditions all day long. Generally speaking, the maximum charging power is 3.7kW.
Under the general trend of unmanned port and smart city cleaning, safety is a must while unmanned forklifts, unmanned sweepers and other equipment are widely used, so wireless