Design of wireless charging system for underwater robot

71% of the Earth's surface is covered by water, of which 97% is the ocean. Due to various complex environmental factors such as ocean climate and ocean current disturbances, underwater exploration and inspection technology in the ocean urgently needs to be replaced by underwater robots. Based on the exploration and inspection needs of underwater oceans, underwater robots have advantages such as small size, low danger factor, and suitability for various complex environments. Especially in long-term operations, underwater robots can still maintain high- quality work efficiency. In response to the issue of long-term homework, this article chooses underwater wireless charging technology as the power supply method for underwater robots, aiming to improve their underwater work endurance. This article analyzes and verifies the feasibility of applying wireless charging to the power supply of underwater robots through theoretical derivation, simulation, and experiments. The experimental results show that the application of wireless charging function in underwater robots can conveniently and quickly supplement electrical energy, effectively improving the underwater operation time of underwater robots.