Numerical experimental investigations of an air-cooled battery thermal management system için kapak resmi
Numerical experimental investigations of an air-cooled battery thermal management system
Göçmen, Sinan, author.
Yazar Ek Girişi:
Fiziksel Tanımlama:
ix, 55 leaves: charts;+ 1 computer laser optical disc.
Electric vehicles play an integral role in eliminating pollution related to transportation, especially if electricity is generated via renewable sources. However, storing electricity onboard requires many battery cells. If the temperature of the cells is not strictly regulated, their capacity decreases in time, and they may burn or explode due to thermal runaway. Battery thermal management systems emerged for safe operations by keeping the battery cell temperatures under limit values. However, the current solutions do not yield uniform temperature distribution for all the cells in a pack. Here, we document that constant temperature distribution can be achieved with uniform coolant distribution to the channels located between batteries. To this end, we performed both numerical and experimental investigations. The design process of the developed battery pack begins with a design used in current packs. Later, how the shape of the distributor channel affects flow uniformity is documented. Then, the design complexity was increased to satisfy the flow uniformity condition, which is essential for temperature uniformity. The design was altered based on a constructal design methodology with an iterative exhaustive search approach. The uncovered constructal design yields a uniform coolant distribution with a maximum of 0.81% flow rate deviation along channels. The developed design is palpable and easy to manufacture relative to the tapered manifold designs. The results also document that the peak temperature difference between the cells decreases from a maximum of 12 K to 0.4 K. Additionally, the developed design was simulated by using Newman, Tiedeman, Gu, and Kim (NTGK) electrochemical battery model, which provides more realistic results due to its heat generation approach in a battery cell. The electrochemical model was simulated with fluid and heat flow simultaneously at the battery pack level. The accuracy of numerical studies is validated by experimental work. The results show that the peak temperature can be kept under the desired operational temperature with a minimum deviation in the temperature difference.
Yazar Ek Girişi:
Tek Biçim Eser Adı:
Thesis (Master)--İzmir Institute of Technology: Mechanical Engineering.

İzmir Institute of Technology: Mechanical Engineering--Thesis (Master).
Elektronik Erişim:
Access to Electronic Versiyon.


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Durumu/İade Tarihi
Tez T002420 TL220 .G576 2021

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