考虑质量流量的电池组蛇形冷却结构仿真

doi:10.19799/j.cnki.2095-4239.2021.0639

储能科学与技术 ›› 2022, Vol. 11 ›› Issue (7): 2274-2281.doi: 10.19799/j.cnki.2095-4239.2021.0639

考虑质量流量的电池组蛇形冷却结构仿真

元佳宇(), 李昕光(), 王文超, 付程阔

青岛理工大学机械与汽车工程学院，山东青岛 266500

收稿日期:2021-12-01 修回日期:2021-12-22 出版日期:2022-07-05 发布日期:2022-06-29
通讯作者: 李昕光 E-mail:yuanjiayu2014@outlook.com;tutulxg@126.com
作者简介:元佳宇（1995—），男，硕士研究生，研究方向为动力电池热管理，E-mail：yuanjiayu2014@outlook.com；
基金资助:
山东省自然科学基金项目(ZR2020MG017)

Simulation of serpentine cooling structure of battery pack considering mass flow

Jiayu YUAN(), Xinguang LI(), Wenchao WANG, Chengkuo FU

School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266500, Shandong, China

Received:2021-12-01 Revised:2021-12-22 Online:2022-07-05 Published:2022-06-29
Contact: Xinguang LI E-mail:yuanjiayu2014@outlook.com;tutulxg@126.com

摘要/Abstract

摘要：

针对大容量方形锂离子动力电池组在放电时存在电池表面温度过高与温度一致性较差问题，以电动汽车用某方形磷酸铁锂电池为研究对象，分别设计了具有单向流通结构和双向对流结构的蛇形管路电池组热管理系统。为了考察两种热管理系统的冷却性能，首先建立了单体电池的电化学-热耦合模型，模型经试验验证后，对不同质量流量下的电池组最高温度、冷却时间以及最大温差进行了对比仿真研究，结果表明：随着质量流量的增大，两种结构的电池组最高温度均呈下降趋势；在不同质量流量下，单向流通结构冷却时间均小于双向对流结构，双向对流结构的电池组的最大温差均小于单向流通结构；在大质量流量下，由于冷却液流速过快，会导致冷却液温度升高，从而影响冷却效果。

关键词: 方形锂电池, 蛇形结构, 电池热管理, 液体冷却, 质量流量

Abstract:

A serpentine pipeline battery pack thermal management system with a unidirectional flow structure and bidirectional convection structure was designed for a square lithium iron phosphate battery for electric vehicles, respectively, to address the problem of high surface temperature and poor temperature uniformity during discharge of a large-capacity square lithium-ion power battery pack. To examine the cooling performance of the two thermal management systems, the electrochemical-thermal coupling model of a single cell was firstly developed, and after the model was confirmed experimentally, the maximum battery pack temperature, cooling time, and maximum temperature difference under various mass flow rates were compared and simulated. The cooling time of the unidirectional flow structure is shorter than that of the bidirectional convection structure, and the maximum temperature difference of the bidirectional convection structure's battery pack is smaller than that of the unidirectional flow structure; under a large mass flow rate, the coolant temperature will rise due to the rapid coolant flow rate, affecting the cooling effect.

Key words: square lithium battery, serpentine structure, battery thermal management, liquid cooling, mass flow rate

中图分类号:

TM 911

元佳宇, 李昕光, 王文超, 付程阔. 考虑质量流量的电池组蛇形冷却结构仿真[J]. 储能科学与技术, 2022, 11(7): 2274-2281.

Jiayu YUAN, Xinguang LI, Wenchao WANG, Chengkuo FU. Simulation of serpentine cooling structure of battery pack considering mass flow[J]. Energy Storage Science and Technology, 2022, 11(7): 2274-2281.

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材料	厚度/μm	密度/ (kg/m³)	比热容/ [J/(kg·K)]	导热系数/ [W/(m·K)]
正极极耳	250	2713	889	235
正极材料	160	3036	1210	1.42
正集流体	20	2700	889	235
分离层	150	650	1956	0.28
电解液	40	1138	1675	0.35
负极极耳	250	8920	378	400
负极材料	120	1542	1058	1.18
负集流体	10	8920	378	400
铝壳	100	1636	1378	0.43

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考虑质量流量的电池组蛇形冷却结构仿真

Simulation of serpentine cooling structure of battery pack considering mass flow

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