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Samuel EnochOghene
Public Documents
2
Assessment and Evaluation of Student Participation and Achievement in a Circuit Theor...
Samuel Enochoghene
October 02, 2023
Circuit theory cuts across every part of electrical engineering and is a fundamental skill for electrical engineers. However the abstractions involved can present challenges for students. In this work, a problem solving approach was employed to help students motivation and interest in class attendance. This study looks at performances in the final examination and analyses them with a view to developing better approaches and tools for future delivery of such a course.
INVESTIGATION OF AGEING AND TEMPERATURE IN LITHIUM-ION CELLS USING A MARKET DEFINITIO...
Samuel EnochOghene
and 1 more
December 29, 2022
This article presents a simplified approach for the tracking of ageing and temperature effects in Lithium-ion cells via a balanced cell voltage approach. This balanced cell approach is obtained from the principle of moments of forces based on fundamental physics, in line with the market definition paradigm. Qualitative and quantitative results obtained show that indeed the balance voltage does track ageing and temperature phenomena in these cells. For example, using a chemistry, a safe maximum balance voltage of about 3.23 V while a minimum of about 3.10 V over 2000 cycles was obtained. Similar qualitative and quantitative results were obtained tracking temperature variation effects over a single cycle. This approach will make implementation of cell (and expectedly battery pack) state tracking more cost effective for typical usage scenarios.