A New Equalization Method for Lithium-Ion Battery Packs Based on CUK  

作　　者：Yu Zhang Sheng Tian Yongkang Zhang 

机构地区：[1]School of Electrical and Electronic Engineering,Hubei University of Technology,Wuhan,430000,China

出　　处：《Energy Engineering》2024年第6期1459-1472,共14页能源工程（英文）

基　　金：Natural Science Foundation of China(51677058);Scientific Research Program of Hubei Provincial Department of Education(T2021005).

摘　　要：Aiming at the traditional CUK equalizer can only perform energy equalization between adjacent batteries,if the two single batteries that need to be equalized are far away from each other,there will be the problem of longer energy transmission path and lower equalization efficiency,this paper optimizes the CUK equalizer and optimizes its peripheral selection circuit,which can support the equalization of single batteries at any two positions.The control strategy adopts the open-circuit voltage(OVC)of the battery and the state of charge(SOC)of the battery as the equalization variables,and selects the corresponding equalization variables according to the energy conditions of the two batteries that need to be equalized,and generates the adaptive equalization current with an adaptive PID controller in order to improve the equalization efficiency.Simulation modeling is performed in Matlab/Simulink 2021b,and the experimental results show that the optimized CUK equalizer in this paper improves the equalization time by 25.58%compared with the traditional CUK equalizer.In addition,compared with the mean value difference(MVD)method,the adaptive PID method reduces the equalization time by about 30%in the static and charging and discharging experimental environments,which verifies the superiority of this equalization scheme.

关 键 词：battery balancing CUK equalizer adaptive PID SOC 

分 类 号：TM912[电气工程—电力电子与电力传动]