电池单体参数不一致对电池模组性能影响研究  

The influence of cell parameters inconsistency on the performance of different topological battery modules

作　　者：王帅[1] 尹忠东[1] 郑重[1] 韩元昭 王银顺[1] 严玉廷 Wang Shuai;Yin Zhongdong;Zheng Zhong;Han Yuanzhao;Wang yinshun;Yan Yuting(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China;Electric Power Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming 650217,China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]云南电网有限责任公司电力科学研究院,昆明650217

出　　处：《电测与仪表》2020年第10期76-82,107,共8页Electrical Measurement & Instrumentation

基　　金：国家重点研发计划重点专项资助(2016YFB0101900)。

摘　　要：由电池单体串并联组成的电池模组是电池系统的有机组成单元,研究不同拓扑模组性能受单体参数不一致性的影响,对实现电池储能系统的规模化具有重要意义。以6节单体为例,通过不同的串并联组合成多种不同拓扑电池模组;基于电池Rint等值电路模型,分析了电池模组内单体不一致原因,建立了不同拓扑模组的等效模型;通过求偏导法,分析了单体内阻的不一致性对模组等效内阻的影响;通过正交实验法,研究了单体内阻、容量和端电压的不一致性对不同拓扑模组等效容量的影响;同时通过正交实验法,分析了单体电压和内阻的不一致性对不同拓扑模组等效端电压的影响。结果表明:"先并后串"型和"先串后并"型模组的等效性能参数受单体参数不一致性影响的差异性明显,且具有一定规律性,可为电池分选与成组提供参考。Battery module composed of cells in series and parallel is an organic component of battery system,so it is significant to research the influence of battery parameters inconsistency on the performance of different topological battery modules which is of much value to realize the scale of battery energy storage system. Taking six battery cells as an example,different kinds of topological battery modules are formed through different series-parallel connection. Then,the equivalent models of different topological modules are established based on Rint equivalent circuit model of battery. After that,the influence of the inconsistency of battery internal resistance on the equivalent internal resistance of different topological modules is analyzed by means of partial derivative method;the influence of the inconsistency of battery internal resistance,capacitance and open circuit voltage on the available capacity of different topology modules is studied though orthogonal test;and the influence of the inconsistency of battery voltage and internal resistance on the equivalent open circuit voltage of different topology modules is researched by derivative method and the orthogonal test. The result shows that the difference of the equivalent performance parameters of the different topological battery modules is obviously influenced by the inconsistency of the battery parameters,and has a certain regularity,which can provide reference for the separation and group of batteries.

关 键 词：电池模组 电池参数 正交实验法 Rint等值电路 不一致性 

分 类 号：TM933[电气工程—电力电子与电力传动]