Voltage Reflex and Equalization Charger for Series-connected Batteries

In this paper, a charger with the functions of voltage reflex and equalization is proposed.The proposed charger for series-connected lithium iron phosphate (LFP) batteries has the following advantages: (1) a voltage reflex circuit is used to obtain a fast charging response and high charging efficiency, and (2) a voltage equalization circuit is used to obtain a voltage balance and extend the lifecycle.Additionally, to achieve the protective functions for charging voltage and current, the proposed charger incorporates a real-time monitoring circuit with LED indictors.Finally, to verify its feasibility, we built a prototype of the voltage reflex and equalization charger.The experimental results are presented to demonstrate the performance of the voltage reflex and equalization charger.