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Design of cell spacing in lithium-ion battery module for improvement in cooling performance of the battery thermal management system

机译:锂离子电池模块细胞间距设计,提高电池热管理系统的冷却性能

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摘要

In the electronics applications rechargeable Lithium-ion batteries having a high energy density is a favorable choice. But due to high energy density internal heat generation is a big problem which tends to increase with increasing the discharge rates. This fact makes thermal management an essential part of the Lithium-ion battery management system. The current study focuses on the use of forced air for cooling of a battery module consisting of 30 Lithium-ion batteries. Numerical models for a single Lithium-ion battery and a battery module cooling system are built for analysis of the system and are validated using data from previous studies. The effect of variation in longitudinal and transverse spacing between batteries on various evaluation parameters is studied. Further, for the optimized battery module the effect of flow velocity and discharge rate is studied resulting in a graph of Nusselt number versus Reynolds number. It is observed that the cooling efficiency factor is prominently affected by the transverse spacing and the temperature uniformity by the longitudinal spacing between the batteries. The current study helps in the selection of the battery module spacing for an optimized value of evaluation parameters.
机译:在电子产品中,具有高能量密度的可充电锂离子电池是有利的选择。但由于高能量密度的内部发热是一个大问题,随着增加的放电速率而趋于增加。这一事实使热管理成为锂离子电池管理系统的重要组成部分。目前的研究侧重于使用强制空气来冷却由30个锂离子电池组成的电池模块。为单锂离子电池和电池模块冷却系统的数值模型用于分析系统,并使用先前研究的数据进行验证。研究了在各种评估参数上的电池之间纵向和横向间隔的变化的影响。此外,对于优化的电池模块,研究了流速和放电速率的效果,从而导致NUSERET数与雷诺数的图表。观察到,冷却效率因子突出受横向间隔和电池之间的纵向间隔的温度均匀的影响。目前的研究有助于选择用于优化评估参数值的电池模块间隔。

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