Battery Management Systems in Li-Ion Battery Applications
Lignell, Leevi (2022)
2022
Tieto- ja sähkötekniikan kandidaattiohjelma - Bachelor's Programme in Computing and Electrical Engineering
Informaatioteknologian ja viestinnän tiedekunta - Faculty of Information Technology and Communication Sciences
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Hyväksymispäivämäärä
2022-12-02
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tuni-202211268656
https://urn.fi/URN:NBN:fi:tuni-202211268656
Tiivistelmä
Lithium-ion batteries have gained popularity in electric vehicles, mobile phones and laptops. Their safe use requires an advanced battery management system. This thesis explores the basics of battery management systems and the data processing methods.
Lithium-ion batteries store energy in chemical form and release energy as electricity. The energy is stored with the help of lithium ions with high reduction potential leading to higher obtainable voltages from the battery cell. The batteries are fast to charge and discharge and have a high energy density. Their advantages compared to other battery types have lead to massive growth of their use and development since the 1990s.
The safe use of lithium-ion batteries requires the use of battery management system. The battery management system protects the battery from overheating, overcharging and too high voltages as well as takes care of balancing the charge between the cells of the battery pack. The functions also include informing the user about the battery's state of charge and state of health. In order to perform well, the battery management system requires information about the cell's characteristics both in use and prior to use. This thesis explores the different cell characterization methods and methods of the estimation of state of charge through literature review, simulations and experiments.
Lithium-ion batteries store energy in chemical form and release energy as electricity. The energy is stored with the help of lithium ions with high reduction potential leading to higher obtainable voltages from the battery cell. The batteries are fast to charge and discharge and have a high energy density. Their advantages compared to other battery types have lead to massive growth of their use and development since the 1990s.
The safe use of lithium-ion batteries requires the use of battery management system. The battery management system protects the battery from overheating, overcharging and too high voltages as well as takes care of balancing the charge between the cells of the battery pack. The functions also include informing the user about the battery's state of charge and state of health. In order to perform well, the battery management system requires information about the cell's characteristics both in use and prior to use. This thesis explores the different cell characterization methods and methods of the estimation of state of charge through literature review, simulations and experiments.
Kokoelmat
- Kandidaatintutkielmat [9161]