Date of Award
Doctor of Philosophy (PhD)
Michael D. Mann
Currently, the faster charging speed of batteries is restricted, especially in freezing the temperature. Research on charging lithium-ion cells at various temperatures ranging from -50 to 60 degrees Celsius has been actively conducted in recent years. Lithium-ion cells' charging capacity is a crucial property in regular consumer and specialized applications, such as military, space, and electric and hybrid vehicles. Although the conductivity of the electrolyte has been ruled out as a limiting factor, there are still many debates on the factors that limit the charging ability at low temperatures. The primary objectives of this work are to develop a charging technique that can: 1) charge a lithium-ion battery to 90% capacity within 15 minutes at 25 degrees Celsius and more than 50% charge within 15 minutes at freezing temperature, 2) increase the battery cycle life as compared to charging using CC-CV protocols, and 3) create a unique technique that can charge the battery using the same number of charging stages independent of temperatures. The success of renewable energy relies heavily on the steady increase of installed power and the development of new multi-MW wind energy systems, along with improvements in reliability. Predictive maintenance plays a significant role in the wind energy industry, particularly in boosting productivity and competitiveness. Although wind turbines have gearboxes that offer well-known benefits, they also pose a potential source of failure. Lubrication plays a vital role for wind turbine gearboxes, and its contamination and degradation is one of the main reasons for wind turbine failure. To solve gearbox oil-related issues, it is crucial to use the appropriate lubricant filtration system. Ensuring the turbine operates continuously with ISO-compliant or cleaner standards is essential to avoid catastrophic damage. This work showcases a remarkable electrostatic lubricant filter design that ensures smooth and continuous operation of turbines while meeting ISO standards or maintaining cleanliness.
Khan, Shabaz, "Two Techniques For Improving Renewable Energy Performance: Fast Charging Of Li-Ion Batteries And Electrostatic Filtration Of Wind Turbine Gear Box Oil" (2023). Theses and Dissertations. 5678.
Available for download on Friday, January 23, 2026