Research on Series-Parallel Connection Switching Charging Method for Lithium Battery of Autonomous Underwater Vehicles

摘要

Unbalanced charging of the power lithium battery pack will restrict the effective use of electric energy for the autonomous underwater vehicle (AUV). In order to improve the balance of power lithium battery cells in the charging process, this paper proposes a novel charging method. Through the detailed analysis of the lithium battery pack's series charging process and parallel charging process, and combining their respective advantages, a series-parallel switching charging equalization method is proposed. The corresponding charging equalization circuit is designed, its working principle is expounded, and the corresponding model is established. The simulation experiment of charging process is carried out. The experimental results show that the proposed charging equalization method reduces the charging current impact and effectively improves the balance of battery cells charging.