内阻
发热
放热反应
阳极
分离器(采油)
阴极
磷酸铁锂
材料科学
锂离子电池
内部加热
化学
电极
复合材料
电池(电)
机械工程
热力学
电化学
工程类
功率(物理)
物理
有机化学
物理化学
作者
Piyatida Trinuruk,Warongkorn Onnuam,Nutthanicha Senanuch,Chinnapat Sawatdeejui,Papangkorn Jenyongsak,Somchai Wongwises
出处
期刊:Energies
[Multidisciplinary Digital Publishing Institute]
日期:2022-12-26
卷期号:16 (1): 264-264
被引量:8
摘要
Data sets of internal resistances and open-circuit voltage of a particular battery are needed in ANSYS Fluent program to predict the heat generation accurately. However, one set of available data, called Chen’s original, does not cover all types and shapes of batteries. Therefore, this research was intended to study the effects of shapes and polarization chemistries on heat generation in Li-ion batteries. Two kinds of material chemistries (nickel manganese cobalt oxide, NMC, and lithium iron phosphate, LFP) and three forms (cylindrical, pouch, and prismatic) were studied and validated with the experiment. Internal resistance was unique to each cell battery. Differences in shapes affected the magnitude of internal resistance, affecting the amount of heat generation. Pouch and prismatic cells had lower internal resistance than cylindrical cells. This may be the result of the forming pattern, in which the anode, cathode, and separator are rolled up, making electrons difficult to move. In contrast, the pouch and prismatic cells are formed as sandwich layers, resulting in electrons moving easily and lowering the internal resistance. The shapes and chemistries did not impact the entropy change. All batteries displayed exothermic behavior during a lower SOC that gradually became endothermic behavior at around 0.4 SOC onwards.
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