锂离子电容器的热特性及热模型

doi:10.19799/j.cnki.2095-4239.2022.0235

储能科学与技术 ›› 2022, Vol. 11 ›› Issue (8): 2629-2636.doi: 10.19799/j.cnki.2095-4239.2022.0235

锂离子电容器的热特性及热模型

闵凡奇¹^,²^,³(), 吕桃林²^,³^,⁴(), 付诗意²^,³, 张立恒¹^,³, 党国举²^,⁵, 晏莉琴²^,³^,⁴, 解晶莹¹^,²^,³(), 高云智¹()

^1.哈尔滨工业大学化工与化学学院，黑龙江哈尔滨 150001
^2.上海动力与储能电池系统工程与研究中心
^3.上海空间电源研究所空间电源技术国家重点实验室，上海 200245
^4.上海动力储能系统工程技术有限公司，上海 200241
^5.上海交通大学化学化工学院，上海 200240

收稿日期:2022-05-05 修回日期:2022-05-22 出版日期:2022-08-05 发布日期:2022-08-03
通讯作者: 解晶莹,高云智 E-mail:minfanqi90@126.com;a357439607@163.com;jyxie@hit.edu.cn;gao_yunzhihit@hit.edu.cn
作者简介:闵凡奇（1990—），男，博士研究生，工程师，研究方向为高功率储能器件技术，E-mail：minfanqi90@126.com
吕桃林（1986—），男，博士，高级工程师，研究方向为新能源储能仿真与模拟技术，E-mail：a357439607@163.com；
基金资助:
上海市青年科技启明星计划(21QB1401400);上海市优秀技术带头人计划(20XD1430800);上海市科委项目(18DZ2284000)

Thermal characteristics and model of lithium-ion capacitor

Fanqi MIN¹^,²^,³(), Taolin LV²^,³^,⁴(), Shiyi FU²^,³, Liheng ZHANG¹^,³, Guoju DANG²^,⁵, Liqin YAN²^,³^,⁴, Jingying XIE¹^,²^,³(), Yunzhi GAO¹()

^1.School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
^2.Shanghai Engineering Center for Power and Energy Storage Systems, 3State Key Laboratory of Space Power-Sources Technology, Shanghai Institute of Space Power-Sources, Shanghai 200245, China
^4.Shanghai Power & Energy Storage Battery System Engineering Technology Co. , Ltd. , Shanghai 200241, China
^5.School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received:2022-05-05 Revised:2022-05-22 Online:2022-08-05 Published:2022-08-03
Contact: Jingying XIE, Yunzhi GAO E-mail:minfanqi90@126.com;a357439607@163.com;jyxie@hit.edu.cn;gao_yunzhihit@hit.edu.cn

摘要/Abstract

摘要：

锂离子电容器具有寿命长、兼顾功率密度和能量密度等优点，充分了解其热特性对其广泛应用意义重大。在多种充放电倍率下进行了锂离子电容器的温升测试，并基于MATLAB和COMSOL Multiphysics 5.4软件进行了其热模型建立及研究。结果表明，随着充放电倍率的增大，锂离子电容器的发热量增加；基于MATLAB建立的集总参数热模型可以实现平均绝对误差不超过0.2 ℃的温升模拟；基于COMSOL构建的热模型中，随着放电倍率增加，温度分布差异增大，而将极耳布置方式改为对角布置可减小温度分布差异，使温度分布更加均匀，更有利于其性能发挥。

关键词: 锂离子电容器, 温升, 热特性, 热模型, 热仿真

Abstract:

A lithium-ion capacitor (LIC) has the advantages of long cycle life, high power density, and high energy density. Comprehensive knowledge of LIC thermal characteristics is essential for its practical application. In this study, a temperature rise test of an LIC is performed under various charge and discharge rates, and its thermal model is established and studied based on MATLAB and COMSOL Multiphysics 5.4 software. The results demonstrate that the calorific value of LIC increases with the rise in charge and discharge rates. Based on the lumped parameter thermal model established in MATLAB, the mean absolute error in the temperature rise simulation can be limited to 0.2 ℃, and the temperature distribution variation increases with the rise in discharge rate. By installing the LIC lugs diagonally on the cell, the temperature difference is reduced, making the temperature more uniform, and the arrangement is advantageous in improving performance.

Key words: lithium-ion capacitor, temperature rise, thermal characteristic, thermal model, thermal simulation

中图分类号:

TM 533

闵凡奇, 吕桃林, 付诗意, 张立恒, 党国举, 晏莉琴, 解晶莹, 高云智. 锂离子电容器的热特性及热模型[J]. 储能科学与技术, 2022, 11(8): 2629-2636.

Fanqi MIN, Taolin LV, Shiyi FU, Liheng ZHANG, Guoju DANG, Liqin YAN, Jingying XIE, Yunzhi GAO. Thermal characteristics and model of lithium-ion capacitor[J]. Energy Storage Science and Technology, 2022, 11(8): 2629-2636.

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实验条件	温升/℃	总发热量/J	可逆热/J	焦耳热/J	极化热/J
1 C充电	-1.800	-876.4	-535.6	149.0	—
5 C充电	1.100	535.6	-1018.8	677.4	877.0
10 C充电	3.300	1606.8	-1217.3	1244.1	1580.0
15 C充电	4.900	2385.8	-1387.7	1749.0	2024.5
20 C充电	6.500	3164.9	-1412.0	2165.6	2411.3
1 C放电	0.400	194.8	535.6	147.0	—
5 C放电	5.285	2573.3	1018.8	698.8	855.7
10 C放电	8.300	4041.3	1217.3	1346.7	1477.3
15 C放电	10.600	5161.2	1387.7	1960.4	1813.1
20 C放电	12.300	5988.9	1412.0	2557.8	2019.1

样品	材质	比热容C_p /[J/(K·g)]	导热系数k/(W·m²/K)	密度ρ/(kg/m³)
正极极耳	Al	900	280	2700
负极极耳	Cu	385	400	8960

网格划分方式	粗化	常规	细化	较细化	极细化
自由度	248	554	766	1474	4612
计算时间/s	1	2	3	10	117

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锂离子电容器的热特性及热模型

Thermal characteristics and model of lithium-ion capacitor

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