At present, the SN topology has been widely used in scenarios with strong coupling, high power density, and limited space or weight at the receiving end. However, for unconventional charging platforms with low voltage and high current, when using the common topology SS, the large current on the secondary side will cause excessive voltage stress on the resonant capacitor, excessive loss at the receiving end, and large eddy current loss in the magnetic core. In this paper, the application of the SN topology in the output low-voltage high-current wireless charging system is mainly studied. The connection between the SN compensation topology and the LLC converter is investigated, the relationship between the input and output voltages of the system and the parameters of the coupling mechanism is established, the loss analysis and efficiency calculation of the coupling mechanism are conducted, and a new design method for the SN topology is proposed, which significantly improves the efficiency of the coupling mechanism part and fully utilizes the characteristics and superiority of the SN topology. The proposed method is verified using an 80V, 200A experimental platform. The experimental results show that the coupling mechanism efficiency can reach 98.3%.