University of Twente Student Theses


Portable State of Power Determination of Li-ion Battery Cells

Vries, Hidde de (2023) Portable State of Power Determination of Li-ion Battery Cells.

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Abstract:A novel portable measurement setup, which allows the determination of the state of power (SOP) for li-ion batteries, is introduced through the development of a prototype. The measurement setup performs a hybrid pulsed power characterisation test using a DC-DC converter and a small energy storage system, compared to the currently existing grid-based solutions. The portability allows for a greater range of use cases, for example energy access, at the cost of measurement precision. To prove the theoretical concept, a prototype was developed and produced for a single battery cell. The setup was tested and verified by creating a battery model, achieved through data fitting on measurements performed. While there is some inaccuracy in both the measurements and data processing, the generated model shows agreement with measured verification data. The battery SOP is determined from the model, for two different use cases. Overall, it is a promising start to creating a portable SOP measurement system for a full battery pack.
Item Type:Essay (Master)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:53 electrotechnology
Programme:Electrical Engineering MSc (60353)
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