Smart Personal Protective Equipment
On-Board Power Management
C. Zwart (TU Delft - Electrical Engineering, Mathematics and Computer Science)
H.J. Donkers (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Henk W. van Zeijl – Mentor (TU Delft - Electronic Components, Technology and Materials)
Willem D. van Driel – Graduation committee member (TU Delft - Electronic Components, Technology and Materials)
Sten Vollebregt – Graduation committee member (TU Delft - Electronic Components, Technology and Materials)
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Abstract
The COVID-19 pandemic caused a shortage of Personal Protective Equipment for Healthcare personnel. This project aims to aid in this shortage by extending the lifetime of the filter material used in a mask. This is done in the form of an SPPE, a Smart Personal Protective Equipment. This face mask has two smart filter heads that are modular and contain UVC LEDs to disinfect the filter, a control system to control the LED's radiative power and an on-board power management system. The latter is the focus of this thesis.
The implementation of an on-board power management system for a smart personal protection face mask was designed in three stages: (1) researching existing theory about battery management, (2) implementing and verifying a system design in Simulink and (3) making a PCB design and selecting off-the-shelf components. The goal of this thesis is to make a complete design of a functional battery management system, that supplies required power to the rest of the system, ensuring safe battery operation and aiming to maximize battery life. In this, the design has succeeded as almost all requirements are met. The result is a PCB design that can be made and combined with two other subgroups to create a Smart Personal Protection face mask. The main findings were a different and possibly new approach to estimating the State of Charge of a battery and designing a Battery management system for low power applications in a small form factor as opposed to battery management systems for electrical vehicles, which are common today.