Modeling and Inconsistency Analysis of Parallel-connected Battery Module with Forced-air Cooling

被引：0
|
作者：
Li C. [1 ]
Cui N. [1 ]
Chang L. [1 ,2 ]
Zhang C. [1 ]
机构：
[1] School of Control Science and Engineering, Shandong University, Jinan
[2] School of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2022年 / 58卷 / 12期
关键词：
forced-air cooling; inconsistency; lithium-ion battery; multi-physics model; parallel-connected battery module;
D O I：
10.3901/JME.2022.12.168
中图分类号：
学科分类号：
摘要：
Lithium-ion batteries are usually connected in series and parallel to meet the power and energy requirements in practical. However, heat accumulation and cell-to-cell inconsistency can be arisen in the battery modules, and therefore affect the module longevity and performance, or even cause safety problem. Herein, the current research focuses on the modeling and inconsistency analysis of a parallel-connected battery module with forced-air cooling strategy. First, a multi-physics model is established for the battery module, which describes the electrochemical characteristics, current distribution and heat transfer within the module. The sub-models and their coupling relationships are then verified by the constant discharge experiments at both single cell and battery module levels. Next, constant discharge with the current of 1C is carried out using the well-validated model, and the cell-to-cell inconsistencies of current, temperature and state of charge are analyzed based on the simulation data. Finally, the parametric study is conducted by which the influences of air inlet velocity, cell spacing and interconnect resistance on the module performance are further analyzed. The research provides a systematic modelling and analysis framework for the power battery modules, which is of guidance for the module optimization design. © 2022 Editorial Office of Chinese Journal of Mechanical Engineering. All rights reserved.
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页码：168 / 179
页数：11
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