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<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.4 20241031//EN"
        "https://jats.nlm.nih.gov/publishing/1.4/JATS-journalpublishing1-4.dtd">
<article  article-type="research-article"        dtd-version="1.4">
            <front>

                <journal-meta>
                                                                <journal-id>uujfe</journal-id>
            <journal-title-group>
                                                                                    <journal-title>Uludağ Üniversitesi Mühendislik Fakültesi Dergisi</journal-title>
            </journal-title-group>
                                        <issn pub-type="epub">2148-4155</issn>
                                                                                            <publisher>
                    <publisher-name>Bursa Uludağ University</publisher-name>
                </publisher>
                    </journal-meta>
                <article-meta>
                                        <article-id pub-id-type="doi">10.17482/uumfd.1807247</article-id>
                                                                <article-categories>
                                            <subj-group  xml:lang="en">
                                                            <subject>Mechanical Engineering (Other)</subject>
                                                    </subj-group>
                                            <subj-group  xml:lang="tr">
                                                            <subject>Makine Mühendisliği (Diğer)</subject>
                                                    </subj-group>
                                    </article-categories>
                                                                                                                                                        <title-group>
                                                                                                                        <trans-title-group xml:lang="tr">
                                    <trans-title>Hava Soğutmalı Batarya Paketinde Akış Tasarımının ve Saptırıcı Plaka Etkisinin Farklı Deşarj Oranlarında İncelenmesi</trans-title>
                                </trans-title-group>
                                                                                                                                                                                                <article-title>INVESTIGATION OF FLOW DESIGN AND DEFLECTOR PLATE EFFECT IN AIR COOLED BATTERY PACK AT DIFFERENT DISCHARGE RATES</article-title>
                                                                                                    </title-group>
            
                                                    <contrib-group content-type="authors">
                                                                        <contrib contrib-type="author">
                                                                    <contrib-id contrib-id-type="orcid">
                                        https://orcid.org/0000-0001-7910-1207</contrib-id>
                                                                <name>
                                    <surname>Tuğan</surname>
                                    <given-names>Volkan</given-names>
                                </name>
                                                                    <aff>MUNZUR ÜNİVERSİTESİ</aff>
                                                            </contrib>
                                                    <contrib contrib-type="author">
                                                                    <contrib-id contrib-id-type="orcid">
                                        https://orcid.org/0000-0001-6511-4058</contrib-id>
                                                                <name>
                                    <surname>Yardımcı</surname>
                                    <given-names>Uğurcan</given-names>
                                </name>
                                                                    <aff>BİNGÖL ÜNİVERSİTESİ</aff>
                                                            </contrib>
                                                                                </contrib-group>
                        
                                        <pub-date pub-type="pub" iso-8601-date="20260410">
                    <day>04</day>
                    <month>10</month>
                    <year>2026</year>
                </pub-date>
                                        <volume>31</volume>
                                        <issue>1</issue>
                                        <fpage>81</fpage>
                                        <lpage>96</lpage>
                        
                        <history>
                                    <date date-type="received" iso-8601-date="20251020">
                        <day>10</day>
                        <month>20</month>
                        <year>2025</year>
                    </date>
                                                    <date date-type="accepted" iso-8601-date="20260219">
                        <day>02</day>
                        <month>19</month>
                        <year>2026</year>
                    </date>
                            </history>
                                        <permissions>
                    <copyright-statement>Copyright © 2002, Uludağ University Journal of The Faculty of Engineering</copyright-statement>
                    <copyright-year>2002</copyright-year>
                    <copyright-holder>Uludağ University Journal of The Faculty of Engineering</copyright-holder>
                </permissions>
            
                                                                                                <trans-abstract xml:lang="tr">
                            <p>Bu çalışmada, hava soğutmalı batarya paketinde farklı akış tasarımının ve saptırıcı plaka kullanımının termal performansa etkisi CFD yöntemi ile incelenmiştir. Çalışmada, geleneksel tek girişli akış yapısına sahip olan Model A ile çift girişli ve saptırıcı plakalarının kullanıldığı Model B karşılaştırılmıştır. Her iki modelde de 24 adet 18650 tip lityum iyon batarya hücresi kullanılmış olup, batarya paketinin hava giriş ve çıkış yüzey alanları eşit olacak şekilde tasarlanmıştır. 3C ve 4C deşarj oranları için gerçekleştirilen analizler sonucunda, çift girişli akış yapısının ve saptırıcı plakaların batarya paketindeki soğutma etkinliğini belirgin biçimde artırdığı gözlemlenmiştir. 3C deşarj oranında, Model B ile elde edilen maksimum batarya sıcaklığının ve maksimum sıcaklık farkının Model B’ye kıyasla sırasıyla 1,87 K ve 1,08 K daha düşük olduğu tespit edilmiştir. 4C deşarj oranında ise bu iyileştirme daha da belirgin hale gelerek maksimum batarya sıcaklığı 2,49 K, maksimum sıcaklık farkı ise 1,44 K kadar azaltılmıştır. Sıcaklık kontürleri incelendiğinde, Model A’da özellikle arka bölgelerde sıcaklık birikimlerinin oluştuğu ve Model B’de daha homojen dağılım meydana geldiği gözlemlenmiştir.</p></trans-abstract>
                                                                                                                                    <abstract><p>In this study, the effect of different flow designs and the use of deflector plates on the thermal performance of an air cooled battery pack was investigated using the CFD method. Model A, which has a conventional single inlet flow structures, was compared with Model B, which employs dual inlets and deflector plates. In both models, 24 cylindrical 18650 lithium-ion battery cells were used, and the inlet and outlet surface areas of the battery pack were designed to be equal. Analyses performed at 3C and 4C discharge rates showed that the dual inlet flow structure and deflector plates significantly improved the cooling efficiency of the battery pack. At a 3C discharge rate, the maximum battery temperature and maximum temperature difference obtained with Model B were 1.87 K and 1.08 K lower, respectively, compared to Model A. At a 4C discharge rate, this improvement became even more pronounced, with the maximum battery temperature reduced by 2.49 K and the maximum temperature difference decreased by 1.44 K. Examination of the temperature contours revealed that, in Model A, heat accumulation occurred particularly in the rear regions, whereas Model B achieved a more homogeneous temperature distribution.</p></abstract>
                                                            
            
                                                                                        <kwd-group>
                                                    <kwd>Battery pack</kwd>
                                                    <kwd>  Air cooled</kwd>
                                                    <kwd>  Deflector plate</kwd>
                                                    <kwd>  Battery thermal management system</kwd>
                                            </kwd-group>
                            
                                                <kwd-group xml:lang="tr">
                                                    <kwd>Batarya paketi</kwd>
                                                    <kwd>  Hava soğutma</kwd>
                                                    <kwd>  Saptırıcı plaka</kwd>
                                                    <kwd>  Batarya termal yönetim sistemi</kwd>
                                            </kwd-group>
                                                                                                                                        </article-meta>
    </front>
    <back>
                            <ref-list>
                                    <ref id="ref1">
                        <label>1</label>
                        <mixed-citation publication-type="journal">Adit, M. A., Pranto, M. M. H., and Kibria, M. G. (2025) Advanced thermal management of lithium-ion battery using fin-enhanced PCM: A CFD study, Future Batteries, 6, 100076. doi:10.1016/j.fub.2025.100076</mixed-citation>
                    </ref>
                                    <ref id="ref2">
                        <label>2</label>
                        <mixed-citation publication-type="journal">Behi, H., Karimi, D., Behi, M., Ghanbarpour, M., Jaguemont, J., Sokkeh, M. A., Gandoman, F. H., Berecibar, M., and Mierlo, J. V. (2020) A new concept of thermal management system in Li-ion battery using AC and heat pipe for electric vehicles, Applied Thermal Engineering, 174, 115280. doi:10.1016/j.applthermaleng.2020.115280</mixed-citation>
                    </ref>
                                    <ref id="ref3">
                        <label>3</label>
                        <mixed-citation publication-type="journal">Gasmelseed, A., Ismael, M. A., Said, M. A., and Ahmad, F. (2025) Performance investigation of mono and hybrid nanofluids in a liquid battery thermal management system under high discharge rate and different drive cycle conditions, Journal of Energy Storage, 116, 116084. doi:10.1016/j.est.2025.116084</mixed-citation>
                    </ref>
                                    <ref id="ref4">
                        <label>4</label>
                        <mixed-citation publication-type="journal">Gupta, R. B., Kumar, D., and Dutta, T. (2026) Efficient lithium-ion battery air-cooling system using aluminium strips, plates, and tubes, and comparison with various air-cooling systems, International Journal of Thermal Sciences, 222, 110541. doi:10.1016/j.ijthermalsci.2025.110541</mixed-citation>
                    </ref>
                                    <ref id="ref5">
                        <label>5</label>
                        <mixed-citation publication-type="journal">Han, P., Wang, J., Zhao, X., Liu, J., Wang, C., and She, X. (2024) Performance study of fin structure in air-cooled thermal management system for column power battery, Journal of Energy Storage, 104, 114697.  doi:10.1016/j.est.2024.114697</mixed-citation>
                    </ref>
                                    <ref id="ref6">
                        <label>6</label>
                        <mixed-citation publication-type="journal">He, R., Song, K., Wu, X., Zhang, Q., Zhang, K., Su, M., and Hou, Q. (2025) Effectiveness analysis of novel battery thermal management systems combining phase change material and air-cooled technologies, Applied Thermal Engineering, 264, 125499.  doi:10.1016/j.applthermaleng.2025.125499</mixed-citation>
                    </ref>
                                    <ref id="ref7">
                        <label>7</label>
                        <mixed-citation publication-type="journal">Jie, L., Zhang, J., Fan, Y., Yu, Z., and Pan, W. (2025) A review of composite phase change materials used in battery thermal management systems, Journal of Energy Storage, 112, 115579. doi:10.1016/j.est.2025.115579</mixed-citation>
                    </ref>
                                    <ref id="ref8">
                        <label>8</label>
                        <mixed-citation publication-type="journal">Li, X., Chang, X., Feng, Y., Dai, Z., and Zheng, L. (2024) Investigation on the heat generation and heat sources of cylindrical NCM811 lithium-ion batteries, Applied Thermal Engineering, 241, 122403. doi:10.1016/j.applthermaleng.2024.122403</mixed-citation>
                    </ref>
                                    <ref id="ref9">
                        <label>9</label>
                        <mixed-citation publication-type="journal">Liu, Z., Huadan, C., Wang, B., and Li, P. (2025) Coupling optimization of protruding fin and PCM in hybrid cooling system and cycle strategy matching for lithium-ion battery thermal management, International Journal of Thermal Sciences, 207, 109372.  doi:10.1016/j.ijthermalsci.2024.109372</mixed-citation>
                    </ref>
                                    <ref id="ref10">
                        <label>10</label>
                        <mixed-citation publication-type="journal">Maher, K., Boumaiza, A., and Amin, R. (2024) Understanding the heat generation mechanisms and the interplay between joule heat and entropy effects as a function of state of charge in lithium-ion batteries, Journal of Power Sources, 623, 235504. doi:10.1016/j.jpowsour.2024.235504</mixed-citation>
                    </ref>
                                    <ref id="ref11">
                        <label>11</label>
                        <mixed-citation publication-type="journal">Najafi, A., Jadidi, A. M., and Rashidi, S. (2025) Experimental study on a thermal management system with air and thermoelectric module designed for lithium-ion battery, Journal of Energy Storage, 111, 115403. doi:10.1016/j.est.2025.115403</mixed-citation>
                    </ref>
                                    <ref id="ref12">
                        <label>12</label>
                        <mixed-citation publication-type="journal">Omar, A. A., and Adham, A. M. (2025) Thermal analysis of lithium-ion batteries using forced-air cooling and circular fin systems: A numerical study, International Journal of Thermofluids, 27, 101212. doi:10.1016/j.ijft.2025.101212</mixed-citation>
                    </ref>
                                    <ref id="ref13">
                        <label>13</label>
                        <mixed-citation publication-type="journal">Öztop, M., and Şahinaslan, A. (2022) Control of temperature distribution for Li-ion battery modules via longitudinal fins, Journal of Energy Storage, 52, 104760. doi:10.1016/j.est.2022.104760</mixed-citation>
                    </ref>
                                    <ref id="ref14">
                        <label>14</label>
                        <mixed-citation publication-type="journal">Ranjan, R., Kumar, R., and Srinivas, T. (2024) Thermal performance of nano-enhanced phase change material and air-based lithium-ion battery thermal management system: An experimental investigation, Journal of Energy Storage, 82, 110567.  doi:10.1016/j.est.2024.110567</mixed-citation>
                    </ref>
                                    <ref id="ref15">
                        <label>15</label>
                        <mixed-citation publication-type="journal">Rastogi, S., Sohaliya, P., and Bakli, C. (2026) Optimizing air-cooled battery thermal management through analytical heat generation modelling and numerical investigation of cooling performance, Journal of Power Sources, 669, 239362. doi:10.1016/j.jpowsour.2026.239362</mixed-citation>
                    </ref>
                                    <ref id="ref16">
                        <label>16</label>
                        <mixed-citation publication-type="journal">Sofi, A. Y., and Qayoum, A. (2025) Design optimization and cooling performance assessment of a pulsating air-cooled lithium-ion battery thermal management system, Thermal Science and Engineering Progress, 59, 103391. doi:10.1016/j.tsep.2025.103391</mixed-citation>
                    </ref>
                                    <ref id="ref17">
                        <label>17</label>
                        <mixed-citation publication-type="journal">Sun, Y., Zhang, H., Qi, F., Li, Y., Guo, H., Wang, C., and Chen, Y. (2025) Battery thermal management systems on the integration of multi-layer phase change materials and liquid cooling energy-saving strategies, Applied Thermal Engineering, 278, 127194.  doi:10.1016/j.applthermaleng.2025.127194</mixed-citation>
                    </ref>
                                    <ref id="ref18">
                        <label>18</label>
                        <mixed-citation publication-type="journal">Tuğan, V., and Yardımcı, U. (2023) Numerical study for battery thermal management system improvement with air channel in electric vehicles, Journal of Energy Storage, 72, 108515. doi:10.1016/j.est.2023.108515</mixed-citation>
                    </ref>
                                    <ref id="ref19">
                        <label>19</label>
                        <mixed-citation publication-type="journal">Wang, H., Tao, T., Xu, J., Mei, X., Liu, X., and Gou, P. (2020) Cooling capacity of a novel modular liquid-cooled battery thermal management system for cylindrical lithium ion batteries, Applied Thermal Engineering, 178, 115591. doi:10.1016/j.applthermaleng.2020.115591</mixed-citation>
                    </ref>
                                    <ref id="ref20">
                        <label>20</label>
                        <mixed-citation publication-type="journal">Williams, N. P., Zelent, B., Trimble, D., and O’Shaughnessy, S. M. (2025) Experimental determination of the entropic heat coefficient of a lithium-ion cell through immersion in a dielectric fluid, Applied Thermal Engineering, 258, 124597.  doi:10.1016/j.applthermaleng.2024.124597</mixed-citation>
                    </ref>
                                    <ref id="ref21">
                        <label>21</label>
                        <mixed-citation publication-type="journal">Wiriyasart, S., Unsomsri, N., and Kaewluan, S. (2025) Influence of packaging configuration on thermal behavior in air-cooled Li-ion battery packs under low C-rate conditions, Thermal Science and Engineering Progress, 61, 103582. doi:10.1016/j.tsep.2025.103582</mixed-citation>
                    </ref>
                                    <ref id="ref22">
                        <label>22</label>
                        <mixed-citation publication-type="journal">Yang, R., Li, K., Xie, Y., Zhang, Y., Xi, C., and Zhang, Y. (2025) Thermal management requirements in battery packs: An analysis of the effects of battery degradation, Energy, 137067. doi:10.1016/j.energy.2025.137067</mixed-citation>
                    </ref>
                                    <ref id="ref23">
                        <label>23</label>
                        <mixed-citation publication-type="journal">Yardımcı, U., and Tuğan, V. (2026) Computational fluid dynamics analysis of battery pack with cooling channel integrated with innovative thermoelectric cooling stations, International Journal of Thermal Sciences, 220, 110380. doi:10.1016/j.ijthermalsci.2025.110380</mixed-citation>
                    </ref>
                                    <ref id="ref24">
                        <label>24</label>
                        <mixed-citation publication-type="journal">Zhang, B., Zeng, Z., Yuan, N., and Shi, H. (2025) Numerical investigation of lithium-ion battery thermal management system performance influenced by physical properties of PCM, Journal of Energy Storage, 117, 116141. doi:10.1016/j.est.2025.116141</mixed-citation>
                    </ref>
                            </ref-list>
                    </back>
    </article>
