Voltage Reflex and Equalization Charger for Series-connected Batteries Cheng-Tao Tsai and Jia-Wei Lin
(Received May 27, 2025; Accepted January 5/ 2026)
Keywords: series-connected, lithium iron phosphate, real-time monitoring
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.
Corresponding author: Cheng-Tao Tsai