Open AccessTwo‐switch equaliser for series‐connected battery stack using zeta type converter and symmetrical capacitor–diode circuit
Author(s) -
Li Xiaolong,
Xu Jianping,
Xu Shungang,
Zhuang Shengxian,
Qin Fuban
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2017.3501
Subject(s) - equaliser , capacitor , diode , stack (abstract data type) , electronic engineering , voltage , series and parallel circuits , battery (electricity) , series (stratigraphy) , inductor , electrical engineering , switched capacitor , engineering , topology (electrical circuits) , control theory (sociology) , computer science , physics , paleontology , channel (broadcasting) , power (physics) , control (management) , quantum mechanics , artificial intelligence , biology , programming language
A two‐switch equaliser for series‐connected battery stack using zeta type converter and symmetrical capacitor–diode circuit is proposed. The proposed equaliser consists of a zeta type front‐end dc–dc converter and symmetrical capacitor–diode circuit, uses only two active switches and two magnetic components, thus it benefits from small circuit volume and flexible for extension. Meanwhile, it can work under open loop, which makes its control simple. Furthermore, high efficiency is achieved by zero voltage switching of all switches. Finally, experimental results of a prototype of the proposed equaliser are presented to verify the analysis results.