A novel approach to battery cell balancing using near-field wireless power transfer

Abstract

This paper presents a novel battery cell balancing technique using near-field wireless power transfer (WPT). The proposed method aims to overcome the drawbacks of conventional passive methods, which have low efficiency and energy waste, as well as the complex control and slow balancing speed of active methods. The authors' experiments demonstrate, for the first time, the successful application of near-field WPT for cell balancing. By wirelessly replenishing energy to the low-energy battery cells while simultaneously charging them via wired connections, the authors achieve a significant reduction of 55.7% in the cell balancing time compared to conventional methods. The effectiveness of the proposed technique is validated through experimental results. This approach offers a promising solution for efficient and fast cell balancing in battery systems.