温度梯度
电池(电)
锂离子电池
电池组
核工程
材料科学
锂(药物)
热的
瓶颈
冷却能力
热阻
热力学
离子
化学
分析化学(期刊)
功率(物理)
计算机科学
色谱法
物理
工程类
嵌入式系统
有机化学
内分泌学
医学
量子力学
作者
Yingchen Xie,Alastair Hales,Ruihe Li,Yu Wu,Yatish Patel,Ruihe Li
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2022-11-01
卷期号:169 (11): 110511-110511
标识
DOI:10.1149/1945-7111/ac9d08
摘要
The surface cooling technology of power battery pack has led to undesired temperature gradient across the cell during thermal management and the tab cooling has been proposed as a promising solution. This paper investigates the feasibility of applying tab cooling in large-format lithium-ion pouch cells using the Cell Cooling Coefficient (CCC). A fundamental problem with tab cooling is highlighted, the CCC for tab cooling decreases as capacity increases. Coupling low CCCs with greater heat generation leads to significant temperature gradients across the cell. Here, the “bottleneck” that limits heat rejection through the tabs is evaluated. The thermal resistance of the physical tabs is identified to be the main contributor towards the poor heat rejection pathway. A numerical thermal model is used to explore the effect of increased tab thickness and results showed that the cell-wide temperature gradients could be significantly reduced. At the negative tab, increasing from 0.2 mm to 2 mm led to a 100% increase in CCC neg whilst increasing the positive tab from 0.45 mm to 2 mm led to an 82% increasing in CCC pos . Together, this is shown to contribute to a 51% reduction in temperature gradient across the cell in any instance of operation.
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