INVESTIGATION OF THE EFFECT OF DIFFERENT DESIGN AND FLOW PARAMETERS ON BATTERY COOLING SYSTEM PERFORMANCE

Yıl 2024, Cilt: 29 Sayı: 3, 819 - 830

Ersel Dönmez , Emre Bulut

https://doi.org/10.17482/uumfd.1570344

Öz

In this study, a module consisting of 30 pouch-type lithium-ion batteries with Lithium Iron Phosphate (LFP) chemistry, known for its lower flammability, was modeled along with its cooling system in a one-dimensional framework. The modeling was conducted using Matlab Simulink and Simscape Battery. The temperature variations and heat generation rates of the battery system were analyzed at different discharge rates. A liquid cooling system, designed to cool the battery module from below, was developed. The cooling performance was examined by selecting a laminar flow regime at lower Reynolds numbers, which were assumed to result in lower pumping losses. In the analyses performed at different Reynolds numbers and with varying numbers of cooling plate channels, it was observed that as the Reynolds number increased, both the heat transfer rate and coolant flow velocity increased, leading to a reduction in battery temperature values but an increase in pressure values.

Anahtar Kelimeler

Battery cooling system, 1-D modelling, Lithium-ion battery

Farklı Tasarım Ve Akış Parametrelerinin Batarya Soğutma Sistemi Performansına Etkisinin İncelenmesi

Öz

Bu çalışmada elektrikli araçlarda kullanılan, yanıcılığı daha az olan Lityum Demir Fosfat kimyasına sahip, 30 adet kese (pouch) tipi adı verilen Lityum iyon bataryadan oluşan bir modül ve soğutma sistemi bir boyutlu olarak modellenmiş ve soğutma performansı incelenmiştir. Modelleme Matlab Simulink ve Simscape Battery ortamında gerçekleştirilmiştir. Farklı deşarj oranlarında batarya sisteminin sıcaklık değişimleri ve ısı üretim miktarları incelenmiştir. Batarya modülünü soğutabilmek için, alttan olacak şekilde sıvı soğutma sistemi tasarlanmıştır. Sıvı soğutma sisteminde pompalama kayıplarının daha az olduğu düşünülen daha düşük Reynolds sayılarında laminer akış tipi seçilerek soğutma perfomansı incelenmiştir. Farklı Reynolds sayılarında ve farklı soğutma plakası kanal sayılarında yapılan analizlerde, Reynolds sayısı arttıkça ısı transfer hızı ve soğutma sıvısı hızı arttığı için batarya sıcaklık değerlerinde düşüş ve basınç değerlerinde artış görülmüştür.

Anahtar Kelimeler

Batarya soğutma sistemi, Bir boyutlu modelleme, lityum iyon batarya

Kaynakça

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