圆柱型锂离子电池组热均衡性研究*

doi:10.19562/j.chinasae.qcgc.2019.011.007

汽车工程 ›› 2019, Vol. 41 ›› Issue (11): 1273-1280.doi: 10.19562/j.chinasae.qcgc.2019.011.007

圆柱型锂离子电池组热均衡性研究^*

崔星¹, 李达², 刘增辉², 韦振³, 郭利伟⁴, 董昊天², 王大方²

1.中国北方车辆研究所,北京 100072;
2.哈尔滨工业大学(威海),威海 264209;
3.中国汽车技术研究中心有限公司,天津 300300;
4.长安大学,西安 710064

收稿日期:2018-10-11 出版日期:2019-11-25 发布日期:2019-11-28
通讯作者: 王大方,教授,E-mail:13863009863@163.com
基金资助:
山东省重点研发计划(2016ZDJS03A04)、中央高校基本科研业务费专项资金(HIT.NSRIF.201705)、哈尔滨工业大学重大科研项目培育计划(ZDXMPY20180109)和山东省自然科学基金(ZR2017MEE011)资助

A Study on Thermal Equilibrium of Cylindrical Lithium-ion Battery Pack

Cui Xing¹, Li Da², Liu Zenghui², Wei Zhen³, Guo Liwei⁴, Dong Haotian², Wang Dafang²

1.China North Vehicle Research Institute, Beijing 100072;
2.Harbin Institute of Technology(Weihai), Weihai 264209;
3.China Automotive Technology and Research Center Co., Ltd., Tianjin 300300;
4.Chang'an University, Xi'an 710064

Received:2018-10-11 Online:2019-11-25 Published:2019-11-28

摘要/Abstract

摘要： 首先建立水冷系统布置方案和三维模型,然后对水冷模式下圆柱形锂离子电池18650不同排列方式的冷却效果和热均衡性进行对比分析,最后对电池模组放电过程中不同点的温度进行测试。定义热比来定量描述电池模组热均衡性。仿真分析与试验验证的结果表明,电池模组几何模型和单体数量相同时,错位排列的冷却效果和热均衡性均优于并行排列,1C放电倍率下,错位排列最高温升比并行排列低2.26 K,热均衡性提高33.9%;同一排列方式下电池单体数量越多,模组热均衡性越差,当模组中单体数量由15增加到60时,并行排列热均衡性下降了5.1%,错位排列热均衡性下降6.3%;几何模型和放电倍率对热均衡性影响很小。

关键词: 圆柱形锂离子动力电池, 热均衡, 水冷系统, 错位排列, 并行排列, 热比

Abstract: Firstly, the layout scheme and 3D model of water cooling system are established. Then the cooling effect and thermal equilibrium of cylindrical lithium-ion battery 18650 in water-cooled mode with different arrangements are comparatively analyzed. Finally, the temperatures at different points of battery module in discharge process are measured. Heat ratio is defined to quantitatively describe the thermal equilibrium of battery module. The results of simulation analysis and test verification show that when the geometric model and cell number of the battery module are the same, the cooling effect and thermal equilibrium of the battery module with staggered arrangement are better than that with parallel arrangement. Under 1C discharge rate, the highest temperature rise of the battery module with staggered arrangement is 2.26 K lower than that with parallel arrangement, with thermal equilibrium improved by 33.9%. In the same arrangement, the more the number of battery cells, the worse the thermal equilibrium of the module. When the number of cells in the module increases from 15 to 60, its thermal equilibrium with parallel arrangement lowers by 5.1%, while that with staggered arrangement lowers by 6.3%, and geometric model and discharge rate have little effects on thermal equilibrium.

Key words: cylindrical lithium-ion traction battery, thermal equilibrium, water cooling system, staggered arrangement, parallel arrangement, heat ratio

崔星, 李达, 刘增辉, 韦振, 郭利伟, 董昊天, 王大方. 圆柱型锂离子电池组热均衡性研究^*[J]. 汽车工程, 2019, 41(11): 1273-1280.

Cui Xing, Li Da, Liu Zenghui, Wei Zhen, Guo Liwei, Dong Haotian, Wang Dafang. A Study on Thermal Equilibrium of Cylindrical Lithium-ion Battery Pack[J]. Automotive Engineering, 2019, 41(11): 1273-1280.

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圆柱型锂离子电池组热均衡性研究^*

A Study on Thermal Equilibrium of Cylindrical Lithium-ion Battery Pack

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