TY - JOUR AU - Kocsis Szürke, Szabolcs AU - Sütheö, Gergő AU - Őri, Péter AU - Lakatos, István TI - Self-Diagnostic Opportunities for Battery Systems in Electric and Hybrid Vehicles JF - MACHINES J2 - MACHINES VL - 12 PY - 2024 IS - 5 SN - 2075-1702 DO - 10.3390/machines12050324 UR - https://m2.mtmt.hu/api/publication/34878340 ID - 34878340 AB - The number of battery systems is also growing significantly along with the rise in electric and hybrid car sales. Different vehicles use different types and numbers of batteries. Furthermore, the layout and operation of the control and protection electronics units may also differ. The research aims to develop an approach that can autonomously detect and localize the weakest cells. The method was validated by testing the battery systems of three different VW e-Golf electric vehicles. A wide-range discharge test was performed to examine the condition assessment and select the appropriate state of charge (SoC) for all three vehicles. On the one hand, the analysis investigated the cell voltage deviations from the average; the tests cover deviations of 0 mV, 12 mV, 60 mV, 120 mV, and 240 mV. On the other hand, the mean value calculation was used to filter out possible erroneous values. Another important aspect was examining the relationship between the state of charges (SoC) and the deviations. Therefore, the 10% step changes were tested to see which SoC level exhibited more significant voltage deviations. Based on the results, it was observed that there are differences between the cases, and the critical range is not necessarily at the lowest SoC level. Furthermore, the load rate (current) and time of its occurrence play an important role in the search for a faulty cell. An additional advantage of this approach is that the process currently being tested on the VW e-Golf can be relatively simply transferred to other types of vehicles. It can also be a very useful addition for autonomous vehicles, as it can self-test the cells in the system at low power consumption. LA - English DB - MTMT ER - TY - JOUR AU - Németh, Attila AU - Ibrahim, Sarah Khaleel AU - Movahedi Rad, Majid AU - Szalai, Szabolcs AU - Major, Zoltán AU - Kocsis Szürke, Szabolcs AU - Jóvér, Vivien AU - Mykola, Sysyn AU - Dmytro, Kurhan AU - Harrach, Dániel AU - Baranyai, Gusztáv AU - Fekete, Imre AU - Nagy, Richárd AU - Csótár , Hanna AU - Klaudia, Madarász AU - András, Pollák AU - Bálint, Molnár AU - Bence, Hermán AU - Kuczmann, Miklós AU - Gáspár, László AU - Fischer, Szabolcs TI - Laboratory and numerical investigation of pre-tensioned reinforced concrete railway sleepers combined with plastic-fiber reinforcement JF - POLYMERS J2 - POLYMERS-BASEL VL - 16 PY - 2024 IS - 11 SP - 1498 SN - 2073-4360 DO - 10.3390/polym16111498 UR - https://m2.mtmt.hu/api/publication/34865886 ID - 34865886 LA - English DB - MTMT ER - TY - JOUR AU - Kocsis Szürke, Szabolcs AU - Szabó, Mátyás AU - Szalai, Szabolcs AU - Fischer, Szabolcs TI - Deformation Analysis of Different Lithium Battery Designs Using the DIC Technique JF - ENERGIES J2 - ENERGIES VL - 17 PY - 2024 IS - 2 PG - 23 SN - 1996-1073 DO - 10.3390/en17020323 UR - https://m2.mtmt.hu/api/publication/34486365 ID - 34486365 LA - English DB - MTMT ER - TY - CONF AU - Jagicza, Márton AU - Sütheö, Gergő AU - Őri, Péter AU - Kocsis Szürke, Szabolcs AU - Lakatos, István TI - Radaralapú vészfékrendszer tesztelése különböző kalibrációs beállításokkal T2 - Fenntartható járműipari technológiák kutatása a Széchenyi István Egyetemen PY - 2023 SP - 1 EP - 14 PG - 14 UR - https://m2.mtmt.hu/api/publication/34862688 ID - 34862688 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Csomós, Bence AU - Kocsis Szürke, Szabolcs AU - Fodor, Dénes TI - Comparison of Coupled Electrochemical and Thermal Modelling Strategies of 18650 Li-Ion Batteries in Finite Element Analysis—A Review JF - MATERIALS J2 - MATERIALS VL - 16 PY - 2023 IS - 24 SN - 1996-1944 DO - 10.3390/ma16247613 UR - https://m2.mtmt.hu/api/publication/34432008 ID - 34432008 AB - The specificities of temperature-dependent electrochemical modelling strategies of 18650 Li-ion batteries were investigated in pseudo-2D, 2D and 3D domains using finite element analysis. Emphasis was placed on exploring the challenges associated with the geometric representation of the batteries in each domain, as well as analysing the performance of coupled thermal-electrochemical models. The results of the simulations were compared with real reference measurements, where temperature data were collected using temperature sensors and a thermal camera. It was highlighted that the spiral geometry provides the most realistic results in terms of the temperature distribution, as its layered structure allows for a detailed realisation of the radial heat transfer within the cell. On the other hand, the 3D-lumped thermal model is able to recover the temperature distribution in the axial direction of the cell and to reveal the influence of the cell cap and the cell wall on the thermal behaviour of the cell. The effect of cooling is an important factor that can be introduced in the models as a boundary condition by heat convection or heat flux. It has been shown that both regulated and unregulated (i.e., natural) cooling conditions can be achieved using an appropriate choice of the rate and type of cooling applied. LA - English DB - MTMT ER - TY - JOUR AU - Monek, Gergő Dávid AU - Szántó, Norbert AU - Korpai, Richárd AU - Kocsis Szürke, Szabolcs AU - Fischer, Szabolcs TI - Enabling Legacy Lab-Scale Production Systems: A Digital Twin Approach at Széchenyi István University JF - JOURNAL OF ENGINEERING MANAGEMENT AND SYSTEMS ENGINEERING J2 - JEMSE VL - 2 PY - 2023 IS - 4 SP - 224 EP - 230 PG - 7 SN - 2958-3519 DO - 10.56578/jemse020404 UR - https://m2.mtmt.hu/api/publication/34266574 ID - 34266574 LA - English DB - MTMT ER - TY - JOUR AU - Ézsiás, László AU - Brautigam, András AU - Kocsis Szürke, Szabolcs AU - Szalai, Szabolcs AU - Fischer, Szabolcs TI - Sustainability in railways – a review JF - CHEMICAL ENGINEERING TRANSACTIONS J2 - CHEM ENG TR VL - 107 PY - 2023 SP - 7 EP - 12 PG - 6 SN - 1974-9791 DO - 10.3303/CET23107002 UR - https://m2.mtmt.hu/api/publication/34194720 ID - 34194720 LA - English DB - MTMT ER - TY - PAT AU - Dineva, Adrienn AU - Kocsis Szürke, Szabolcs TI - Eljárás akkumulátor, különösen elektromos jármű lítium akkumulátor diagnosztikai és prediktív modellezésre dinamikus működési környezetben, valamint berendezés az eljárás megvalósítására PY - 2023 UR - https://m2.mtmt.hu/api/publication/34038227 ID - 34038227 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Kocsis Szürke, Szabolcs AU - KOVÁCS, Gábor AU - SYSYN, Mykola AU - LIU, Jianxing AU - Fischer, Szabolcs TI - Numerical optimization of battery heat management of electric vehicles JF - JOURNAL OF APPLIED AND COMPUTATIONAL MECHANICS J2 - J APPL COMPUT MECH VL - 9 PY - 2023 IS - 4 SP - 1076 EP - 1092 PG - 17 SN - 2383-4536 DO - 10.22055/JACM.2023.43703.4119 UR - https://m2.mtmt.hu/api/publication/34017499 ID - 34017499 AB - Lithium-ion battery technology in the modern automotive industry utilizes highly temperature-sensitive batteries. Here, air cooling strategies will be the most applicable for the chosen example based on strategies for temperature control. Simulations have been utilized to evaluate the different thermal management strategies. A battery model was developed using the solutions offered by Computational Fluid Dynamics (CFD) simulation technology. It utilizes the heat produced by the discharge of the battery cells. Due to the simulation's limited computational capacity, the energy transfer model was implemented with a simplified but sufficiently complex physical mesh. Ten actual measurements were conducted in the laboratory to investigate the heating of the cell during the charging and discharging of 18650-type batteries. The results were applied to validate the simulation model. The simulation outcomes and thermal camera readings were compared. The cell-level numerical model was then extended to examine the temperature variation at the system level. The primary design objective is to achieve the highest energy density possible, which necessitates that the cells be constructed as closely as possible; however, increasing the distance between the cells can provide superior cooling from a thermal management perspective. The effect of varying the distance between individual cells on the system's heating was analyzed. Greater distance resulted in a more efficient heat transfer. It was also discovered that, in some instances, a small distance between cells produces inferior results compared to when constructed adjacently. A critical distance range has been established based on these simulations, which facilitates the placement of the cells. LA - English DB - MTMT ER - TY - JOUR AU - Kocsis Szürke, Szabolcs AU - PERNESS, Norbert AU - Földesi, Péter AU - KURHAN, Dmytro AU - SYSYN, Mykola AU - Fischer, Szabolcs TI - A Risk Assessment Technique for Energy-Efficient Drones to Support Pilots and Ensure Safe Flying JF - INFRASTRUCTURES J2 - INFRASTRUCTURES-BASE VL - 8 PY - 2023 IS - 4 PG - 24 SN - 2412-3811 DO - 10.3390/infrastructures8040067 UR - https://m2.mtmt.hu/api/publication/33721349 ID - 33721349 LA - English DB - MTMT ER -