Optimal cell tab design and cooling strategy for cylindrical lithium-ion batteries

JOURNAL OF POWER SOURCES

卷:492

Article

Li, Shen¹  Kirkaldy, Niall¹  Zhang, Cheng²  Gopalakrishnan, Krishnakumar³  Amietszajew, Tazdin²  Diaz, Laura Bravo¹  Barreras, Jorge Varela¹  Shams, Mosayeb¹  Hua, Xiao¹  Patel, Yatish^1,4  Offer, Gregory J.^1,4  Marinescu, Monica^1,4 

[1] Imperial Coll London, Dept Mech Engn, London SW7 2AZ, England

[2] Coventry Univ, Inst Future Transport & Cities, Coventry CV1 5FB, W Midlands, England

[3] UCL, Ctr Computat Sci CCS, 131 Christopher Ingold Bldg, London WC1H 0AJ, England

[4] Faraday Inst, Harwell Sci & Innovat Campus, Didcot OX11 0RA, Oxon, England

关键词: Lithium-ion battery;    Electro-thermal model;    Cell design;    Thermal management;   

DOI  :  10.1016/j.jpowsour.2021.229594

来源: Elsevier

【 摘 要 】

The ability to correctly predict the behavior of lithium ion batteries is critical for safety, performance, cost and lifetime. Particularly important for this purpose is the prediction of the internal temperature of cells, because of the positive feedback between heat generation and current distribution. In this work, a comprehensive electro-thermal model is developed for a cylindrical lithium-ion cell. The model is comprehensively parameterized and validated with experimental data for 2170 cylindrical cells (LG M50T, NMC811), including direct core tem-perature measurements. The validated model is used to study different cell designs and cooling approaches and their effects on the internal temperature of the cell. Increasing the number of tabs connecting the jellyroll to the base of the cylindrical-can reduces the internal thermal gradient by up to 25.41%. On its own, side cooling is more effective than base cooling at removing heat, yet both result in thermal gradients within the cell of a similar magnitude, irrespective of the number of cell tabs. The results are of immediate interest to both cell manufac-turers and battery pack designers, while the modelling and parameterization framework created is an essential tool for energy storage system design.

【 授权许可】

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