基于直流道液冷板的动力电池冷却性能仿真

doi:10.3969/j.issn.1674-8484.2021.03.013

汽车安全与节能学报 ›› 2021, Vol. 12 ›› Issue (3): 380-385.DOI: 10.3969/j.issn.1674-8484.2021.03.013

基于直流道液冷板的动力电池冷却性能仿真

蔡森林¹(), 魏名山¹^,^*(), 宋盼盼¹, 魏洪革²

1.北京理工大学机械与车辆学院,北京100081,中国
2.北京海纳川汽车部件股份有限公司,北京100081,中国

收稿日期:2021-05-17 出版日期:2021-09-30 发布日期:2021-10-09
通讯作者: 魏名山
作者简介:* 魏名山（1975—）,男（汉族）,安徽,教授。E-mail: mswei@bit.edu.cn。
蔡森林（1997—）,男（汉族）,四川,硕士研究生。E-mail: 18792738652@163.com。

Cooling performance simulation of the power battery pack based on straight liquid cooling plate

CAI Senlin¹(), WEI Mingshan¹^,^*(), SONG Panpan¹, WEI Hongge²

1. School of Mechanical and Vehicle, Beijing Institute of Technology, Beijing 100081, China
2. Beijing Hainachuan Automotive Parts Co., Ltd., Beijing 100081, China

Received:2021-05-17 Online:2021-09-30 Published:2021-10-09
Contact: WEI Mingshan

摘要/Abstract

摘要：

为了改善某商用车动力电池组的散热能力,降低电池组冷却系统的能耗,提出了一种并联非等长直流道的液冷板结构。以方形锂离子电池组为研究对象,建立液冷式锂离子电池组冷却系统的仿真模型,对液冷板结构进行优化。结果表明:该液冷板在满足电池组散热能力的同时能够较好地控制液冷板压降;结构优化后的液冷板流动阻力最大降低12.5 kPa,电池组的最高温度和最大温差的最大降幅分别为0.26 ℃和0.27 ℃。调整冷却液流量和温度能够提升电池组散热能力,确保电池组在合理的温度范围内工作。

关键词: 动力电池组, 电池热管理, 液冷板, 压降, 数值模拟

Abstract:

A liquid cooling plate structure with a parallel non-equal-length channel was proposed to improve the heat dissipation ability of the power battery pack of a commercial vehicle and to reduce the energy consumption of the cooling system of the battery pack. A simulation model of a liquid cooling prismatic lithium-ion battery pack was established to optimize the structure of liquid cooling plate. The results show that the cooling plate not only meets the cooling capacity of the battery pack, but also can effectively control the pressure drop. The pressure drop of the liquid cooling plate decreases by 12.5 kPa, and the maximum temperature and maximum temperature difference in the battery pack decrease by 0.26 ℃ and 0.27 ℃, respectively. Adjustments on the flow rate and temperature of coolants could enhance the heat dissipation capacity of the battery pack to keep the battery pack working within a reasonable temperature range.

Key words: power battery pack, battery thermal management, cooling plate, pressure drop, numerical simulation

中图分类号:

T912
U469.72

蔡森林, 魏名山, 宋盼盼, 魏洪革. 基于直流道液冷板的动力电池冷却性能仿真[J]. 汽车安全与节能学报, 2021, 12(3): 380-385.

CAI Senlin, WEI Mingshan, SONG Panpan, WEI Hongge. Cooling performance simulation of the power battery pack based on straight liquid cooling plate[J]. Journal of Automotive Safety and Energy, 2021, 12(3): 380-385.

图/表 10

名称	ρ / (kg·m^-3)	C_p / (J·kg·K^-1)	λ / (W·m^-1·K^-1)
电池	2 123	913.0	λ_x: 1.40; λ_y:30.6; λ_z: 30.6
液冷板	2 800	880.0	193.0
冷却液	1 077	3 310.0	0.415
导热垫	1 130	1 320.0	2.000
上壳体	1 900	1 260.0	0.300

表1 各种材料物性参数

图1 电池包几何模型

图2 液冷板结构示意图

图3 计算模型网格划分

图4 网格无关性验证

图5 液冷板温度对比图

图6 电池组温度对比图

图7 冷却液压降随冷却液质量流量的变化

图8 电池组温度场随冷却液质量流量的变化

图9 电池组温度场随冷却液入口温度的变化

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基于直流道液冷板的动力电池冷却性能仿真

Cooling performance simulation of the power battery pack based on straight liquid cooling plate

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