D20.1 - A Battery Strings Circulating Current Blocking Method for Battery Energy Storage Systems

Thursday, March 20, 2025

11:30 AM – 1:30 PM ET

Location: Level One, Hall A3

Technical Dialogue Presenter(s)

Haihong Long (he/him/his)

Zhejiang University

Presentation Paper

Co-Author(s)

Xin Wu

Zhejiang University
DX

Dehong Xu, PhD

Zhejiang University
Ziang Sun, MA (Postgraduate (PE) at Zhejiang University)

Zhejiang University
YF

Yucheng Fan

Zhejiang University

Circulating current in parallel-connected battery strings within Battery Energy Storage Systems (BESS) can significantly impact system efficiency, battery life, and safety. A circulating current blocking circuit and a corresponding control strategy for the BESS are proposed in this paper. It can block the circulating current and fault current between battery strings during charging mode, discharging mode, standby mode and fault mode of the BESS. Simulation results validate the effectiveness of the proposed method. The experimental results will be given in the final paper.