Characterizing thermal distribution of electric heating plates for power battery

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2024-11-22 DOI:10.1016/j.icheatmasstransfer.2024.108329

Guanqing Wang, Zhiyu Li, Junhua Zhang, Shuai Wang, Guanghua Zheng, Jiangrong Xu

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引用次数: 0

Abstract

Electric preheating of power batteries within specific temperature ranges is recognized as a promising technology for enabling fast charging and discharging. Among various methods, electric heating plate (EHP) has gained widespread attention. Nevertheless, its performance remains insufficiently understood. In this study, the EHP is comprehensively characterized through the construction of a realistic three-dimensional transient model, which is experimentally validated. Detailed analysis is conducted on the influence of resistance wire (RW) width and thermal power, with a particular focus on temperature profiles and uniformity. The results show that a circular fillet structure is recommended to ensure uniform current distribution in RW instead of the traditional right-angle fillet structure. The temperature of the EHP gradually decreases from its center to the outwards, forming an O-shape distribution of isotherm. The temperature uniformity and maximum temperature difference are primarily determined by the width and spacing of RW, demonstrating a positive correlation. Our finding also reveals that an EHP with a RW width of 1 mm displays a maximum temperature difference within ±0.5 K, meeting the requirements imposed by major industrial power battery producers. These results not only provide guidance for optimizing EHP architecture but also support enhanced performance in the fast charging and discharging of power batteries.

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动力电池电热板的热分布特征

在特定温度范围内对动力电池进行电预热被认为是实现快速充放电的一项前景广阔的技术。在各种方法中，电加热板（EHP）受到了广泛关注。然而，人们对其性能的了解仍然不够。在本研究中，通过构建一个逼真的三维瞬态模型对 EHP 进行了全面描述，并通过实验进行了验证。详细分析了电阻丝 (RW) 宽度和热功率的影响，尤其关注温度曲线和均匀性。结果表明，建议采用圆形圆角结构，而不是传统的直角圆角结构，以确保电阻丝中的电流分布均匀。EHP 的温度从中心向外逐渐降低，形成 O 型等温线分布。温度均匀性和最大温差主要取决于 RW 的宽度和间距，两者呈正相关。我们的研究结果还表明，RW 宽度为 1 毫米的 EHP 显示的最大温差在 ±0.5 K 以内，符合主要工业动力电池生产商的要求。这些结果不仅为优化 EHP 结构提供了指导，还有助于提高动力电池的快速充放电性能。

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

International Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.