Keyoonwong, Wiwat

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Keyoonwong, Wiwat
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wiwat.ke@kmitl.ac.th

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    Estimating Surface Temperature Profile Of Li-Ion Battery Under Several Conditions
    (2024-01-01)
    Keyoonwong, Wiwat
    ;
    Mesakhun, Korndanai
    ;
    Intanil, Kananat
    ;
    Siriwilawan, Nicharee
    ;
    Chipchukiad, Tisorn
    In recent years, electric vehicles have become increasingly popular as a highly efficient and environmentally friendly transportation option worldwide. This trend is primarily due to the growing global awareness of the importance of pollution and carbon emissions from road transportation. According to the International Energy Agency (IEA) latest report, the sales of electric vehicles have exceeded 10 million in 2022. Electric vehicles consist of various components that are used for propulsion. One of the crucial components that stores energy for propulsion is the battery. The efficiency and lifetime of batteries depend on the temperature during usage. To ensure long lifetime and efficiency of batteries, temperature management is crucial. Batteries perform best when the temperature is neither too low or high. Therefore, the thermal issue of battery in electric vehicles is essential and has been continuously researched and developed. Heat in batteries and thermal modeling of batteries are important for estimating battery temperature profiles.
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    Integrated Vehicle-Following Control for Four-Wheel Independent Drive Based on Regenerative Braking System Control Mechanism for Battery Electric Vehicle Conversion Driven by PMSM 30 kW
    (2024-06-01)
    Techalimsakul, Pataphiphat
    ;
    Keyoonwong, Wiwat
    This study proposed the hybrid energy storage paradigm (HESP) equipped with front-wheel permanent magnet synchronous motors (PMSMs) for battery electric vehicles (BEVs). In this case, all four wheels are driven by a single motor using mechanical coupling to distribute the motor’s power to each wheel evenly. The HESP is a combination of several supercapacitors (SCs) and an NMC-lithium battery equipped with an advanced artificial neural network (ANN) that will enhance the regenerative braking system (RBS) efficiency of energy storage during braking. The three-phase inverter switching algorithm ensures efficient regenerative braking and fine adjustment of the brake force distribution. Under the RBS, the HESP with the ANN first transfers braking energy to the SC and, when the safety standard is reached, the SC transfers it to the battery. The RBS control maintains an even distribution of braking force at all distances to ensure stability during braking. The results show that a traditional BEV can drive 245.46 km (35 cycles), while an EV with an RBS-only battery can drive 282.56 km (40 cycles). An EV with HESP-RBS can drive 338.78 km (48 cycles), which is an increase of 93.32 km (13 cycles). The HESP-RBS increased the regenerative efficiency by 38.01% when compared to a traditional BEV.
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    Study impedance and temperature behavior of LFP battery as function of relative humidity and temperature under various conditions
    (2024-01-01)
    Keyoonwong, Wiwat
    ;
    Phiphuannok, Kankawi
    ;
    Janesawatpong, Kittipot
    ;
    Seeboonrueang, Kotchapon
    ;
    Amnuaysap, Nuttapum
    Nowadays, lithium-ion batteries are widely employed in a lot of applications. For example, using batteries to provide energy for Electric Vehicles. In use, Batteries are charged and discharged in many cycles, which impacts battery aging. Battery aging causes capacity reduction and internal resistance increase. As is well known, the battery resistance changes with temperature and state of charge (SOC). However, no one has yet studied whether relative humidity affects the battery resistance or not. In this paper, behavior of LFP batteries as function of relative humidity and temperature under various conditions is analyzed. During the aging process, a battery impedance meter was performed at various conditions to analyze the change of the battery impedance due to relative humidity and temperatures. Additionally, the time required to charge the battery under different conditions was analyzed.