چكيده به لاتين
The ever-increasing increase of greenhouse gases such as carbon dioxide, followed by global
warming, has caused concern for the future of mankind. To help reduce the emission of these
gases, the use of alternative energy sources to fossil fuels is a vital research goal. Electric vehicles
with electric propulsion and lithium-ion batteries as energy sources are among pollution-free
vehicles. But in the macro view and life cycle view, the production and transportation of these
batteries can cause pollution. Therefore, it is important to investigate the ways to increase the life
of these batteries with the aim of reducing their carbon emissions. Proper thermal management of
batteries can increase their life. For this purpose, the use of phase change materials, due to
advantages such as no energy consumption and the ability to create a uniform temperature
distribution, has been a serious concern of researchers in recent years. But it is possible that these
materials themselves have a high carbon emission rate. The purpose of this research is to use phase
change materials in the thermal management of the battery, to investigate the carbon emission
during the battery life cycle, and finally to compare this amount of carbon emission with air cooling
and without thermal management. The method of doing the work is that the charge-discharge
profile of a single battery cell of Nissan Leaf car for real conditions during different temperatures
of the year is extracted from the Amesim software. Then, with this variable flow profile in hand,
it has been simulated in three modes without thermal management, air-cool and using phase change
materials in Fluent software based on the computational fluid dynamics of this single cell. It is
assumed that this car goes through the WLTP cycle at 7 am and 5 pm on 22 days of every month
(equivalent to moving from home to work and from work to home respectively). Season-by-season
reviews were done for single battery cells. In the next step, using the Fluent software outputs, the
cell life is evaluated by the Amesim's life model, and the battery life in each thermal management
mode is calculated and compared. In the last step, the carbon emission of each mode of thermal
management has been done using the data bank of Grate software and compared with each other.
In the end, it is clear that the use of phase change materials during a certain period of 20 years,
both in increasing battery life and in reducing carbon emissions, is better than the air-cool thermal
management system, and the air-cool thermal management system is better. from not using thermal
management on the battery.
