Kristoffer Axby, Electrical Engineering

​Title: Investigation into losses of Li-ion batteries with different design aspects

Welcome to the master thesis presentation
Investigation into losses of Li-ion batteries with different design aspects  
by Kristoffer Axby  
Conducted at division of Electric Power Engineering supervised by Evelina Wikner
Opponents: Ludvig Svensson, Johannes Lampela

The thickness of an electrode for a Li-ion battery heavily impacts the performance of the battery cell, as the energy density and power density of the cell as well as the cell efficiency is dependant on the thickness of the cell. The materials required to assemble the battery cells will aslo differ depending on cell chemistry and electrode chemsitry and thus, the cost of assembling the cell and the greenhouse gas (GHG) emissions will vary as well.

This thesis investigates three different cell chemistries, each with five different electrode thicknesses in order to analyse the performance of the cells as well as the financial and environmental aspects of battery design and cell cycling. The cell models are created in COMSOL multiphysics and then exported to MATLAB where the equivalent circuit model parameters are acquired through a Glavanic Intermittent Titration Technique (GITT) test. The parameters, as well as the capacity of each cell is implemented into a SIMULINK model of an electric vehicle. The vehicle model is subject to a drive cycle which sets a power demand as well as an energy demand on the vehicle. Each battery pack is dimensioned from these two demands and as such results regarding energy loss depending on cell chemistry and thickness are acquired and compared. Finally, these results are compared with the GHG emissions created during a battery cycle, the GHG emissions of creating the different battery packs and the cost of creating each pack in order to find the optimal battery design.

Kristoffer and Torbjörn

​Join the seminar by Zoom
Password: Thesis
Category Student project presentation
Location: Fredrik Lamm room, Chalmers Electric Power Engineering division
Starts: 19 May, 2022, 16:00
Ends: 19 May, 2022, 17:00

Page manager Published: Fri 13 May 2022.