In response to the wireless charging requirements of the dual battery system for special robots, this paper proposes a single transmitter dual receiver wireless charging system with decoupled and controllable receiving ends. By designing the coil structures of the transmitting and receiving ends, combined with the high-voltage side full bridge half bridge switching topology, a charging mode from the DC power grid to the high-voltage battery has been achieved: the transmitting coil is coupled with the high-voltage coil, and the low-voltage coil achieves induced current cancellation due to its symmetrical reverse structure, eliminating the interference of high-voltage ripple waves on the low-voltage circuit; Charging mode from high-voltage battery to low-voltage battery: By changing the direction of current and coil polarity, energy transfer from high-voltage to low-voltage is achieved, and it is decoupled from the transmitting end. Maxwell magnetic field simulation and PLECS circuit simulation have verified the feasibility of the scheme: at an operating frequency of 85 kHz and a 30 mm air gap, physical isolation charging between the high voltage side (100.8V) and the low voltage side (33.6V) has been successfully achieved, solving the single point fault risk and cross interference problems in traditional schemes.