Research on Lfp Battery Balancing Strategy for the Hybrid Energy Storage System

Abstract

For the problem of consistency decline in the long-term use of battery packs for the hybrid energy storage system, a dynamic timing adjustment balancing strategy is proposed based on the charge-discharge topology. Compared with the traditional balancing strategy, the dynamic timing adjustment balance strategy is more suitable for the transient high-frequency pulse and high-power output of the hybrid energy storage system. It gives full play to the pulse output adjustment function of the integrated charge-discharge topology. The advantages of the strategy include improving the balance between the battery packs, prolonging the service life of the battery packs, and improving the continuous work capability of the system. Combined with the work condition of the hybrid energy storage system, the balance control model is established, and cycle charge-discharge test platform of battery packs is built. The effectiveness and advantage of the balance strategy of dynamic timing adjustment is verified by the experiment and simulation.

Keywords: Hybrid energy storage system, integrated charge-discharge topology, balancing strategy