动力电池分散逻辑式均衡系统及其均衡策略研究  

Research on Decentralized Logic Equalization System for Power Battery and Its Equalization Strategy

作　　者：佘畅 蔡涛 魏芃 段善旭 SHE Chang;CAI Tao;WEI Peng;DUAN Shanxu(State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

机构地区：[1]华中科技大学电气与电子工程学院强电磁工程与新技术国家重点实验室,武汉430074

出　　处：《电源学报》2019年第2期153-162,共10页Journal of Power Supply

基　　金：湖北省技术创新专项重大项目(2017AAA130)~~

摘　　要：研究了一种适合高压动力电池组的分散逻辑式均衡系统,并分析了该系统结构及其控制策略。在所提出的电池均衡系统中,整车电池组被划分为多个电池模组进行模块化分散管理。均衡变换器结合电池模组的电压信息,构造变参数下垂控制器,调节电池模组输入输出功率,实现电池模组的实时均衡。与此同时,均衡变换器还可以代替车内辅助铅酸蓄电池为车内低压设备供电,减小了车内电气单元的体积与成本。对均衡控制策略的稳定性进行了分析,对均衡变换器(双向双半桥变换器)进行了建模与设计,实验结果验证了均衡系统及均衡策略的可行性。A decentralized logic equalization system suitable for high-voltage power battery packs is studied in this paper, and its structure and control strategy are given. In this system, the entire vehicle battery pack is divided into multiple battery modules for modular decentralized management. The equalization converter combines the voltage information of battery modules, constructs a variable parameter droop controller, and adjusts the input and output power of battery modules, thus realizing a real-time equalization. At the same time, the equalization converter can also replace the in-vehicle auxiliary lead-acid battery to supply power to the on-board low-voltage equipment, thereby reducing the volumes and costs of electrical units in the vehicle. The stability under the equalization control strategy is analyzed, and the model and design of the equalization converter, i.e., a bi-directional dual half-bridge(DHB) converter, are performed. Experimental results verified the feasibility of the equalization system and the equalization strategy.

关 键 词：电池均衡 分散逻辑控制 下垂控制 双向双半桥变换器 

分 类 号：TM912[电气工程—电力电子与电力传动]