Thermal management scheme and optimization of cylindrical lithium-ion battery pack based on air cooling and liquid cooling

IF 6.1 2区工程技术 Q2 ENERGY & FUELS

Applied Thermal Engineering Pub Date : 2023-04-01 DOI:10.1016/j.applthermaleng.2023.120100

Shiji Xin, Chun Wang, Huan Xi

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引用次数: 12

Abstract

Battery thermal management system (BTMS) ensures the batteries work in a safe and suitable temperature range. In this study, a hybrid BTMS based on air cooling and liquid cooling is proposed. The heat generated by the battery is transferred to the coolant by heat conducting blocks (HCBs) which are evenly spaced along the axial direction of it to maintain the normal operation of the battery pack. Air cooling is then introduced to maintain the battery's temperature uniformity at the battery pack's edge. A three-dimensional simulation model was designed and established to explore the number and size of HCBs, the effects of flow rate and the addition of air cooling on the comprehensive performance of BTMS. The results indicate that a good balance of cooling performance, power consumption, and lightweight will be achieved when the number of HCBs is three, the diameter of the cooling channel on the heat exchanger block is 6 mm and the flow rate of each cooling channel is 0.002 kg/s. In this case, the maximum temperature (T_max) is 34.41 °C and the maximum temperature difference (ΔT) is 1.53 °C. The addition of air cooling lowers T_max and ΔT by 3.75 °C and 0.96 °C, respectively, and lowers the maximum temperature difference of single battery cell from 6.31 °C to 3.86 °C. Additionally, when intermittent air cooling is used, system power consumption is decreased while the battery pack can operate within the proper temperature range.

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基于空冷和液冷的圆柱形锂离子电池组热管理方案及优化

电池热管理系统(BTMS)确保电池在安全、适宜的温度范围内工作。本文提出了一种基于风冷和液冷的混合式BTMS。电池产生的热量通过沿其轴向均匀分布的导热块(hcb)传递给冷却剂，以维持电池组的正常运行。然后引入空气冷却以保持电池组边缘的电池温度均匀性。设计并建立了hcb的三维仿真模型，探讨了hcb的数量、尺寸、流量和风冷的加入对BTMS综合性能的影响。结果表明，当hcb数量为3个，换热器块上冷却通道直径为6 mm，每条冷却通道流量为0.002 kg/s时，可以获得较好的制冷性能、功耗和轻量化平衡。此时最高温度(Tmax)为34.41℃，最大温差(ΔT)为1.53℃。风冷的加入使Tmax和ΔT分别降低了3.75°C和0.96°C，单体电池最大温差从6.31°C降低到3.86°C。另外，采用间歇风冷时，在降低系统功耗的同时，电池组可以在适当的温度范围内工作。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Thermal Engineering 工程技术-工程：机械

CiteScore

11.30

自引率

15.60%

发文量

1474

审稿时长

57 days

期刊介绍： Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.