Battery state-of-charge estimation based on open-circuit voltage measurement

The ever-increasing number of fossil fuel powered vehicles has led to the production of large amount of carbon dioxide, which results in environmental issues like global warming. The automotive industry is one of the primary contributors to the carbon footprint caused by automobile exhaust, which co...

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Main Author: Li, Yixuan
Other Authors: See Kye Yak
Format: Thesis-Master by Coursework
Language:English
Published: Nanyang Technological University 2023
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Online Access:https://hdl.handle.net/10356/166245
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1662452023-07-04T16:14:43Z Battery state-of-charge estimation based on open-circuit voltage measurement Li, Yixuan See Kye Yak School of Electrical and Electronic Engineering EKYSEE@ntu.edu.sg Engineering::Electrical and electronic engineering The ever-increasing number of fossil fuel powered vehicles has led to the production of large amount of carbon dioxide, which results in environmental issues like global warming. The automotive industry is one of the primary contributors to the carbon footprint caused by automobile exhaust, which contains up to 100 different compounds. To combat these issues, electric vehicles (EVs) have been emerged as a solution due to their low pollution, energy-saving, and reduced exhaust emissions. The battery is the most crucial component of EVs, and the positive electrode material, which accounts for the highest proportion of the battery's cost, has become a focus in reducing battery cost. Among all the materials, the LiFePO4 battery (LFP) has been found to be the most suitable material because of its low cost, as well as large capacitance, long life-cycle, high-temperature stability, and high discharge capacity. The accurate estimation of the battery's state of charge (SOC) is essential for maintaining safe operation of the battery and maximizing its efficiency. However, the battery's nonlinear behavior during operation makes determining its SOC challenging. In this dissertation, the open-circuit voltage (OCV) of the battery will be explored as a parameter to estimate the SOC accurately with the objective to examine the suitability of OCV for the estimation of the SOC of the LFP battery. Master of Science (Power Engineering) 2023-04-18T11:44:54Z 2023-04-18T11:44:54Z 2023 Thesis-Master by Coursework Li, Y. (2023). Battery state-of-charge estimation based on open-circuit voltage measurement. Master's thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/166245 https://hdl.handle.net/10356/166245 en application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering
spellingShingle Engineering::Electrical and electronic engineering
Li, Yixuan
Battery state-of-charge estimation based on open-circuit voltage measurement
description The ever-increasing number of fossil fuel powered vehicles has led to the production of large amount of carbon dioxide, which results in environmental issues like global warming. The automotive industry is one of the primary contributors to the carbon footprint caused by automobile exhaust, which contains up to 100 different compounds. To combat these issues, electric vehicles (EVs) have been emerged as a solution due to their low pollution, energy-saving, and reduced exhaust emissions. The battery is the most crucial component of EVs, and the positive electrode material, which accounts for the highest proportion of the battery's cost, has become a focus in reducing battery cost. Among all the materials, the LiFePO4 battery (LFP) has been found to be the most suitable material because of its low cost, as well as large capacitance, long life-cycle, high-temperature stability, and high discharge capacity. The accurate estimation of the battery's state of charge (SOC) is essential for maintaining safe operation of the battery and maximizing its efficiency. However, the battery's nonlinear behavior during operation makes determining its SOC challenging. In this dissertation, the open-circuit voltage (OCV) of the battery will be explored as a parameter to estimate the SOC accurately with the objective to examine the suitability of OCV for the estimation of the SOC of the LFP battery.
author2 See Kye Yak
author_facet See Kye Yak
Li, Yixuan
format Thesis-Master by Coursework
author Li, Yixuan
author_sort Li, Yixuan
title Battery state-of-charge estimation based on open-circuit voltage measurement
title_short Battery state-of-charge estimation based on open-circuit voltage measurement
title_full Battery state-of-charge estimation based on open-circuit voltage measurement
title_fullStr Battery state-of-charge estimation based on open-circuit voltage measurement
title_full_unstemmed Battery state-of-charge estimation based on open-circuit voltage measurement
title_sort battery state-of-charge estimation based on open-circuit voltage measurement
publisher Nanyang Technological University
publishDate 2023
url https://hdl.handle.net/10356/166245
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