分析粉煤灰纳米流体性能以优化电动汽车电池热管理系统的模拟方法

Energy Storage Pub Date : 2024-08-01 DOI:10.1002/est2.70005
Prajwal Thorat, Sudarshan Sanap, Shashank Gawade, Sateesh Patil
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引用次数: 0

摘要

电动汽车(EV)是汽车行业模式的根本转变,其驱动力是实现可持续交通、改善气候变化和减少温室气体排放。近年来,电动汽车(EV)技术取得了长足的进步,其中包括电池效率、续航里程和充电基础设施的改善。作为电动汽车的主要储能选择,锂离子电池技术取得了巨大进步,提高了能量密度,降低了成本。快速充电站和智能电网集成的发展极大地解决了人们对便利性和充电时间的担忧,也促进了电动汽车被更广泛地接受。然而,目前使用的锂离子电池的工作温度范围为 15°C-35°C。温度过高或过低都会影响车辆的续航里程和电池性能。为了有效冷却并使电池保持在工作温度范围内,必须采用合适的电池热管理系统(BTMS)。在间接液体冷却系统中利用分散在水-乙二醇基液中的粉煤灰纳米颗粒作为冷却剂是当前工作的主要课题。针对 14 个 2S7P 配置的 LFP 圆柱形电池和电池之间的蛇形冷却通道,我们创建了一个 ANSYS FLUENT 模型。本次研究的目的是通过使用颗粒浓度为 5%的粉煤灰纳米流体作为冷却剂,了解不同流速下出口处的温度升高情况。当流体流速为 0.1 m/s 时,冷却性能较好,出口温度上升了 311.976 K,比 300 K 的入口流体温度高出 4%。0.1 米/秒和 3 米/秒时流体流出温度上升的百分比差为 3.07%,表明在较低的流体流速下冷却效率较高。与当前的冷却剂乙二醇相比,使用粉煤灰纳米流体的平均温差(ΔT)增加率在 0.9% 到 1.2% 之间。因此,在电池冷却应用中使用粉煤灰作为纳米流体肯定有助于降低电池组的温度,并能提供一种可持续的解决方案,减少环境退化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A simulation approach in analyzing performance of fly ash nanofluid for optimizing battery thermal management system used in EVs

Electric vehicles (EVs) are a fundamental paradigm shift in the automotive industry, driven by the desire to achieve sustainable mobility, ameliorate climate change, and cut greenhouse gas emissions. Electric vehicle (EV) technology has advanced significantly in recent years, with improvements in battery efficiency, range, and charging infrastructure among them. Lithium-ion battery technology has evolved tremendously, boosting energy density and cutting costs as the primary energy storage option for electric vehicles. The advancement of fast-charging stations and smart grid integration, which have significantly resolved concerns with convenience and charging time, has also fostered a wider acceptance of EVs. Nonetheless, the operating temperature range of the lithium-ion cells currently in use is 15°C-35°C. The vehicle's range and battery performance can be impacted by temperatures above or below. For efficient cooling and to keep the cells within the operational temperature range, a suitable Battery Thermal Management System (BTMS) must be implemented. The utilization of fly ash nanoparticles dispersed in water-ethylene glycol base fluid as coolant in indirect liquid cooling systems is the main topic of the current work. For 14 LFP cylindrical cells with a 2S7P configuration and a serpentine cooling channel between the cells, an ANSYS FLUENT model has been created. The goal of the current study is to comprehend the rise in temperature at the outlet for various flow velocities by using fly ash nanofluid with 5% particle concentration as cooling. When the fluid flow rate was 0.1 m/s, the cooling performance was better, resulting in an outlet temperature rise of 311.976 K and a 4% temperature rise above the 300 K inlet fluid flow temperature. Indicating efficient cooling at lower fluid flow velocities, the percentage difference between the rise in temperature of the fluid's outflow at 0.1 and 3 m/s is 3.07%. Compared to the current coolant, ethylene glycol, the average increase in temperature difference (∆T)% is between 0.9% and 1.2% using fly ash nanofluid. Thus, the use of Fly ash as a nanofluid in battery cooling applications will certainly help to reduce the temperature of the battery pack and can provide a sustainable solution leading to lesser degradation of the environment.

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