Communication and Equalization Strategy in Distributed Series-Connected Battery String based on Talkative Power Converter

Talkative power is an emerging technique using converters to realize simultaneous power and information transmission. This paper presents a communication and equalization strategy in series-connected battery strings based on talkative power converters (TPC), reducing system cost and complexity. The TPC-based time-division communication protocol is proposed to avoid conflicts and ensure reliable information transmission. Fuzzy control is used to adjust the equalization current according to the battery status and realize safe and fast equalization. Finally, a five-battery four-equalizer system is built for validation.