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    PROFILE OF 12-V VOLTAGE-REGULATED LEAD-ACID BATTERY

    Husnayain, Faiz

    [Thesis]. Manchester, UK: The University of Manchester; 2017.

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    Abstract

    A fast charging and an accurate battery State of Charge (SoC) and State of Health (SoH) estimation method are essential for having optimum utilisation of a battery energy storage system (BESS). Both are considered as key aspects of an advanced battery management system (BMS) for any green technology application, including future vehicles. The proper method of charging is to extend the battery life, decrease the charging time and prevent it from potential damage from being overcharged. An accurate and reliable SoC and SoH estimation is important for user convenience, safety, and battery performance. Accurate knowledge of BESS profile is the starting point to build a fast charger and advanced BMS. Investigating the operation algorithm of typical 12V VRLA battery charger and compare two basic SoC estimation methods are the two main objectives of this thesis. This thesis summarises the research work of the MPhil project 'Profile of 12-V Voltage-Regulated Lead-Acid Battery (VRLAB) during Charge and Discharge Operation'. Three different capacities of VRLAB were tested using a commercial charger and four different discharge rates. Experiment results were analysed and the SoC-SoH of the batteries were estimated based on full discharge test and coulomb counting method. The commercial charger control algorithm is a three-step PWM charging method (constant current /CC, constant voltage /CV and floating voltage /FV). The battery voltage (Vbat) profile of each VRLAB during charging was highly affected by the initial and the historical Vbat of the previous BESS operation. The Vbat average increased rate and Ibat average decreased rate during the CC and CV charging period, which were 0.23V/h and 0.05A/h, respectively. The SoH (represent Qmax) of the battery decreases as the battery cycle increases (ageing), as shown in the last experiment result with an error of 10%. IEEE standard for VRLA is used to test the battery performance by discharge test based on time discharge (tdis) and discharge rate variables.

    Bibliographic metadata

    Type of resource:
    Content type:
    Administered thesis
    Form of thesis:
    Traditional
    Type of submission:
    Doctoral level ETD - final
    Thesis title:
    PROFILE OF 12-V VOLTAGE-REGULATED LEAD-ACID BATTERY
    Degree type:
    Master of Philosophy
    Degree programme:
    MPhil Electrical and Electronic Engineering
    Publication date:
    2017-11-06T12:10:23
    Institution:
    The University of Manchester
    Location:
    Manchester, UK
    Total pages:
    107
    Abstract:
    A fast charging and an accurate battery State of Charge (SoC) and State of Health (SoH) estimation method are essential for having optimum utilisation of a battery energy storage system (BESS). Both are considered as key aspects of an advanced battery management system (BMS) for any green technology application, including future vehicles. The proper method of charging is to extend the battery life, decrease the charging time and prevent it from potential damage from being overcharged. An accurate and reliable SoC and SoH estimation is important for user convenience, safety, and battery performance. Accurate knowledge of BESS profile is the starting point to build a fast charger and advanced BMS. Investigating the operation algorithm of typical 12V VRLA battery charger and compare two basic SoC estimation methods are the two main objectives of this thesis. This thesis summarises the research work of the MPhil project 'Profile of 12-V Voltage-Regulated Lead-Acid Battery (VRLAB) during Charge and Discharge Operation'. Three different capacities of VRLAB were tested using a commercial charger and four different discharge rates. Experiment results were analysed and the SoC-SoH of the batteries were estimated based on full discharge test and coulomb counting method. The commercial charger control algorithm is a three-step PWM charging method (constant current /CC, constant voltage /CV and floating voltage /FV). The battery voltage (Vbat) profile of each VRLAB during charging was highly affected by the initial and the historical Vbat of the previous BESS operation. The Vbat average increased rate and Ibat average decreased rate during the CC and CV charging period, which were 0.23V/h and 0.05A/h, respectively. The SoH (represent Qmax) of the battery decreases as the battery cycle increases (ageing), as shown in the last experiment result with an error of 10%. IEEE standard for VRLA is used to test the battery performance by discharge test based on time discharge (tdis) and discharge rate variables.
    Additional digital content not deposited electronically:
    None
    Non-digital content not deposited electronically:
    None
    Keyword(s):
    Thesis main supervisor(s):
    Thesis co-supervisor(s):
    Funder(s):
    Degree grantor:
    Language:
    en

    Institutional metadata

    University researcher(s):

    Record metadata

    Manchester eScholar ID:
    uk-ac-man-scw:312102
    Created by:
    Husnayain, Faiz
    Created:
    6th November, 2017, 12:10:23
    Last modified by:
    Husnayain, Faiz
    Last modified:
    1st December, 2017, 09:09:53

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