محمد مستاجران

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.

خودروي برقي، باتري ليتيوم يون، سيكل رانندگي، چرخه عمر، مواد تغيير فاز دهنده، محاسبه عمر، رد پاي كربن

Electric vehicle, Lithium-ion battery, Driving cycle, Life cycle, Phase-change materials, Lifetime calculation, Carbon footprint

Mohammad Mostajeran

Gholamreza Molaeimanesh