@article{LauschTaklaSchweiger2020, author = {Lausch, Jonas and Takla, Monir and Schweiger, Hans-Georg}, title = {Crush testing approach for flat-plate fibrous materials}, volume = {2020}, pages = {108333}, journal = {Composites Part B: Engineering}, number = {200}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1879-1069}, doi = {https://doi.org/10.1016/j.compositesb.2020.108333}, year = {2020}, language = {en} } @article{GeisbauerWoehrlMittmannetal.2020, author = {Geisbauer, Christian and W{\"o}hrl, Katharina and Mittmann, Christoph and Schweiger, Hans-Georg}, title = {Review of Safety Aspects of Calendar Aged Lithium Ion Batteries}, volume = {167}, pages = {090523}, journal = {Journal of the Electrochemical Society}, number = {9}, publisher = {IOP Publishing}, address = {Bristol}, issn = {1945-7111}, doi = {https://doi.org/10.1149/1945-7111/ab89bf}, year = {2020}, abstract = {Nowadays, lithium ion batteries have found their place in a various field of portable applications. With the upcoming of electrically propelled vehicles, it is mandatory to guarantee a safe and predictable behavior during the whole lifetime and not only after manufacturing during performance tests. To gain a general overview of the abuse behavior, research on the topic of abusive tests on calendar-aged cells is being investigated, split up depending on the electrode composition and lined up against each other. It can be shown, that almost all abuse experiments have been performed with external heating tests in the past, still leaving research gaps that need to be filled.}, language = {en} } @article{BoehmKubjatkoPaulaetal.2020, author = {B{\"o}hm, Klaus and Kubjatko, Tibor and Paula, Daniel and Schweiger, Hans-Georg}, title = {New developments on EDR (Event Data Recorder) for automated vehicles}, volume = {10}, journal = {Open Engineering}, number = {1}, publisher = {De Gruyter}, address = {Berlin}, issn = {2391-5439}, doi = {https://doi.org/10.1515/eng-2020-0007}, pages = {140 -- 146}, year = {2020}, abstract = {With the upcoming new legislative rules in the EU on Event Data Recorder beginning 2022 the question is whether the discussed data base is sufficient for the needs of clarifying accidents involving automated vehicles. Based on the reconstruction of real accidents including vehicles with ADAS combined with specially designed crash tests a broader data base than US EDR regulation (NHTSA 49 CFR Part 563.7) is proposed. The working group AHEAD, to which the authors contribute, has already elaborated a data model that fits the needs of automated driving. The structure of this data model is shown. Moreover, the special benefits of storing internal video or photo feeds form the vehicle camera systems combined with object data is illustrated. When using a sophisticate 3D measurement method of the accident scene the videos or photos can also serve as a control instance for the stored vehicle data. The AHEAD Data Model enhanced with the storage of the video and photo feeds should be considered in the planned roadmap of the Informal Working Group (IWG) on EDR/ DSSAD (Data Storage System for Automated Driving) reporting to UNECE WP29. Also, a data access over the air using technology already applied in China for electric vehicles called Real Time Monitoring would allow a quantum leap in forensic accident reconstruction.}, language = {en} } @article{StegerNitscheArbesmeieretal.2020, author = {Steger, Fabian and Nitsche, Alexander and Arbesmeier, Alexander and Brade, Katja and Schweiger, Hans-Georg and Belski, Iouri}, title = {Teaching Battery Basics in Laboratories: Hands-On Versus Simulated Experiments}, volume = {63}, journal = {IEEE Transactions on Education}, number = {3}, publisher = {IEEE}, address = {Piscataway}, issn = {1557-9638}, doi = {https://doi.org/10.1109/TE.2020.2970554}, pages = {198 -- 208}, year = {2020}, abstract = {Contribution: Prior studies comparing the effectiveness of different laboratory learning modes do not allow one to draw a universally valid conclusion, as other influences are mixed with the learning modes. In order to contribute to the existing body of work and to add another piece to the puzzle, this article demonstrates an improved methodology to evaluate the effectiveness of computer-simulated laboratories in comparison to hands-on exercises using a battery basics practical course as a case study. Background: Computer-simulated experiments are becoming increasingly popular for conducting laboratory exercises in higher education and vocational training institutions. To ensure the consistent quality of laboratory learning, an accurate comparison between the results of simulated experiments and practical hands-on experiments is required. Intended Outcomes: In this article, the achievement of the following learning objectives were compared between the two laboratory modes: 1) comprehension of the most important parameters of battery cells and 2) knowledge on how these parameters can be determined using adequate experimental procedures. Application Design: To avoid interference of factors other than laboratory mode on the learning, laboratory instructions and experimental interfaces ensured identical execution of the experiments in the compared modes. Using a counterbalanced methodology, the two laboratory modes alternated by the session, while the experimental procedures remained constant regardless of the respective modes. Findings: Tests taken by the participants after conducting the laboratory experiments revealed that hands-on laboratories resulted in statistically significantly better student performance than simulated laboratories. This difference was even more pronounced for the participants that finished a vocational education and training program before the university studies.}, language = {en} } @article{KimStegerKotaketal.2019, author = {Kim, Woong-Ki and Steger, Fabian and Kotak, Bhavya and Knudsen, Peter V. R. and Girgsdies, Uwe and Schweiger, Hans-Georg}, title = {Water Condensation in Traction Battery Systems}, volume = {12}, pages = {1171}, journal = {Energies}, number = {6}, publisher = {MDPI}, address = {Basel}, issn = {1996-1073}, doi = {https://doi.org/10.3390/en12061171}, year = {2019}, abstract = {Lithium-ion traction battery systems of hybrid and electric vehicles must have a high level of durability and reliability like all other components and systems of a vehicle. Battery systems get heated while in the application. To ensure the desired life span and performance, most systems are equipped with a cooling system. The changing environmental condition in daily use may cause water condensation in the housing of the battery system. In this study, three system designs were investigated, to compare different solutions to deal with pressure differences and condensation: (1) a sealed battery system, (2) an open system and (3) a battery system equipped with a pressure compensation element (PCE). These three designs were tested under two conditions: (a) in normal operation and (b) in a maximum humidity scenario. The amount of the condensation in the housing was determined through a change in relative humidity of air inside the housing. Through PCE and available spacing of the housing, moisture entered into the housing during the cooling process. While applying the test scenarios, the gradient-based drift of the moisture into the housing contributed maximum towards the condensation. Condensation occurred on the internal surface for all the three design variants.}, language = {en} } @article{GeisbauerWoehrlKochetal.2021, author = {Geisbauer, Christian and W{\"o}hrl, Katharina and Koch, Daniel and Wilhelm, Gudrun and Schneider, Gerhard and Schweiger, Hans-Georg}, title = {Comparative Study on the Calendar Aging Behavior of Six Different Lithium-Ion Cell Chemistries in Terms of Parameter Variation}, volume = {14}, pages = {3358}, journal = {Energies}, number = {11}, publisher = {MDPI}, address = {Basel}, issn = {1996-1073}, doi = {https://doi.org/10.3390/en14113358}, year = {2021}, abstract = {The degradation of lithium-ion cells is an important aspect, not only for quality management, but also for the customer of the application like, e.g., scooters or electric vehicles. During the lifetime of the system, the overall health on the battery plays a key role in its depreciation. Therefore, it is necessary to monitor the health of the battery during operation, i.e., cycle life, but also during stationary conditions, i.e., calendar aging. In this work, the degradation due to calendar aging is analyzed for six different cell chemistries in terms of capacity degradation and impedance increase and their performance are being compared. In a new proposed metric, the relative deviations between various cells with the exact identical aging history are being analyzed for their degradation effects and their differences, which stands out in comparison to similar research. The capacity loss was found to be most drastic at 60 °C and at higher storage voltages, even for titanate-oxide cells. LiNiMnCoO2 (NMC), LiNiCoAlO2 (NCA) and Li2TiO3 (LTO) cells at 60 °C showed the most drastic capacity decrease. NMC and NCA cells at 60 °C and highest storage voltage did not show any open circuit voltage, as their current interrupt mechanism triggered. The effect of aging shows no uniform impact on the changes in the capacity variance when comparing different aging conditions, with respect to the evaluated standard deviation for all cells. The focus of this work was on the calendar aging effect and may be supplemented in a second study for cyclic aging.}, language = {en} } @article{LauschTaklaSchweiger2021, author = {Lausch, Jonas and Takla, Monir and Schweiger, Hans-Georg}, title = {Crush characteristics of flat-plate discontinuous carbon composites}, volume = {147}, pages = {106431}, journal = {Composites Part A: Applied science and manufacturing}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1359-835X}, doi = {https://doi.org/10.1016/j.compositesa.2021.106431}, year = {2021}, language = {en} } @article{KotakMarchanteFernandezCanalsCasalsetal.2021, author = {Kotak, Yash and Marchante Fern{\´a}ndez, Carlos and Canals Casals, Lluc and Kotak, Bhavya and Koch, Daniel and Geisbauer, Christian and Trilla, Llu{\´i}s and G{\´o}mez-Nu{\~n}ez, Alberto and Schweiger, Hans-Georg}, title = {End of Electric Vehicle Batteries}, volume = {14}, pages = {2217}, journal = {Energies}, subtitle = {Reuse vs. Recycle}, number = {8}, publisher = {MDPI}, address = {Basel}, issn = {1996-1073}, doi = {https://doi.org/10.3390/en14082217}, year = {2021}, abstract = {It is a fact that electric vehicles (EVs) are beneficial for climate protection. However, the current challenge is to decide on whether to reuse an EV battery or to recycle it after its first use. This paper theoretically investigates these areas i.e., recycle and reuse. It was found that there are several commercially used recycling processes and also some are under research to regain maximum possible materials and quantity. The concept of reusing (second life) of the battery is promising because, at the end of the first life, batteries from EVs can be used in several applications such as storing energy generated from renewable sources to support the government grid. However, the cost and life-cycle analysis (LCA) demonstrated that there are several aspects involved in battery reuse applications. Henceforth, one LCA generalised method cannot provide an optimal approach for all cases. It is important to have a detailed study on each of the battery reusing applications. Until then, it is safe to say that reusing the battery is a good option as it would give some time to recycling companies to develop cost and energy-efficient methods.}, language = {en} } @article{WoehrlGeisbauerNebletal.2021, author = {W{\"o}hrl, Katharina and Geisbauer, Christian and Nebl, Christoph and Lott, Susanne and Schweiger, Hans-Georg}, title = {Crashed Electric Vehicle Handling and Recommendations - State of the Art in Germany}, volume = {14}, pages = {1040}, journal = {Energies}, number = {4}, publisher = {MDPI}, address = {Basel}, issn = {1996-1073}, doi = {https://doi.org/10.3390/en14041040}, year = {2021}, abstract = {In the near future, electric powered vehicles will represent a major part of the road traffic. Accordingly, there will be a natural increase of accidents involving electric vehicles. There are not many cases of such accidents yet and therefore the experience and correct handling are still partially open points for the involved parties, such as the rescue services for example. The aim of this work is to provide a complete overview of the accident handling sequence in Germany, starting with the damaged vehicle on site and moving on to the risks and challenges for the stakeholders, such as transport and recycling companies. Arising from the developed overview, a handling recommendation for yet undiscussed points is given. Especially, different extinguishing and deactivation methods are compared and discussed. Due to a lack of a common live-feed from battery data on site, other criteria have to be taken into account to assess the state of the battery. The wrecked vehicle—including the high voltage system—needs to be in a definite safe state at the handover to a towing service. Depending on the case, different options for securing the vehicle will be considered in this work.}, language = {en} } @unpublished{PaulaBauderPfeilschifteretal.2023, author = {Paula, Daniel and Bauder, Maximilian and Pfeilschifter, Claus and Petermeier, Franziska and Kubjatko, Tibor and B{\"o}hm, Klaus and Riener, Andreas and Schweiger, Hans-Georg}, title = {Impact of Partially Automated Driving Functions on Forensic Accident Reconstruction: A Simulator Study on Driver Reaction Behavior in the Event of a Malfunctioning System Behavior}, publisher = {Preprints}, address = {Basel}, doi = {https://doi.org/10.20944/preprints202311.0947.v1}, year = {2023}, abstract = {Partially automated driving functions (SAE Level 2) can control a vehicle's longitudinal and lateral movements. However, taking over the driving task involves automation risks that the driver must manage. In severe accidents, the driver's ability to avoid a collision must be assessed, considering their expected reaction behavior. The primary goal of this study is to generate essential data on driver reaction behavior in case of malfunctions in partially automated driving functions for use in legal affairs. A simulator study with two scenarios involving 32 subjects was conducted for this purpose. The first scenario investigated driver reactions to system limitations during cornering. The second scenario examined driver responses to phantom braking caused by the AEBS. As a result, the first scenario shows that none of the subjects could control the situation safely. Due to partial automation, we could also identify a new part of the reaction time, the hands-on time, which leads to increased steering reaction times of 1.18 to 1.74 seconds. In the second scenario, we found that 25 of the 32 subjects could not override the phantom braking by pressing the accelerator pedal, although 16 subjects were informed about the system analog to the actual vehicle manuals. Overall, the study suggests that the current legal perspective on vehicle control and the expected driver reaction behavior for accident avoidance should be reconsidered.}, language = {en} } @inproceedings{MeilingerHassSchieberetal.2023, author = {Meilinger, Florian and Haß, Jan and Schieber, Christina and Schweiger, Hans-Georg}, title = {Investigation of the hazard potential of lithium-ion cells in case of overcharging with automotive oriented high-voltage levels}, booktitle = {Applied Research Conference 2023 Conference Proceedings: 3rd July 2023 Technische Hochschule Ingolstadt}, editor = {Vaculin, Ondrej}, publisher = {Technische Hochschule Ingolstadt}, address = {Ingolstadt}, doi = {https://doi.org/10.57825/repo_in-5244}, pages = {254 -- 259}, year = {2023}, language = {en} } @inproceedings{WalterSchweiger2023, author = {Walter, Gero and Schweiger, Hans-Georg}, title = {Structural Health Monitoring of Hydrogen Pressure Vessels for Fuel Cell Electric Vehicles}, booktitle = {Applied Research Conference 2023 Conference Proceedings: 3rd July 2023 Technische Hochschule Ingolstadt}, editor = {Vaculin, Ondrej}, publisher = {Technische Hochschule Ingolstadt}, address = {Ingolstadt}, doi = {https://doi.org/10.57825/repo_in-5244}, pages = {282 -- 287}, year = {2023}, language = {en} } @inproceedings{WierlingSchweiger2023, author = {Wierling, Charlotte and Schweiger, Hans-Georg}, title = {Comparison of Facilities for Abuse Tests on Hydrogen Storage Vessels with Regard to Safety-Related Aspects}, booktitle = {Applied Research Conference 2023 Conference Proceedings: 3rd July 2023 Technische Hochschule Ingolstadt}, editor = {Vaculin, Ondrej}, publisher = {Technische Hochschule Ingolstadt}, address = {Ingolstadt}, doi = {https://doi.org/10.57825/repo_in-5244}, pages = {233 -- 238}, year = {2023}, language = {en} } @article{BauderKubjatkoSchweiger2023, author = {Bauder, Maximilian and Kubjatko, Tibor and Schweiger, Hans-Georg}, title = {Cooperative Awareness Messages' Generation Frequencies, Trigger Distributions, and Pseudonym Changes of First Commercially Deployed Vehicles in Real Operating Scenarios}, volume = {11}, journal = {IEEE Access}, publisher = {IEEE}, address = {New York}, issn = {2169-3536}, doi = {https://doi.org/10.1109/ACCESS.2023.3292576}, pages = {69708 -- 69719}, year = {2023}, abstract = {Cooperative Intelligent Transport Systems have been deployed in mass-produced vehicles in Europe (Golf 8, ID.3, etc.) since 2019, promising major improvements in vehicle safety, efficiency, and comfort. Equipped with Vehicle-to-X communication, the vehicles directly send information about their driving status to the environment. The data are already used for many Vehicle-to-X communication use-cases specified by the Car-2-Car Communication Consortium to achieve the above-mentioned improvements. This study focuses on using Vehicle-2-X communication and its messages for accident analysis. For this purpose, we investigated the advantage in temporal resolution of the continuously sent Cooperative Awareness Message compared to the Event-Data-Recorder for accident reconstruction in the pre-crash. A high resolution of the temporal accident scene is essential for the doubtless clarification of accidents. Therefore, we analyzed the generation frequencies and the trigger conditions of the Cooperative Awareness Message of vehicles available on the European market while driving in real traffic and during different parking maneuvers. Also, the pseudonym change was analyzed. We found that the average generation frequency of the Cooperative Awareness Message is higher than the 2.00 Hz recording frequency of the event data recorder for all scenarios investigated. Especially on rural roads and highways, the temporal resolution is advantageous. Since many serious accidents occur on rural roads, the use of Cooperative Awareness Messages could significantly benefit the reconstruction of the accident scene. Thus, we recommend increasing efforts to use the Cooperative Awareness Message as digital data for accident analysis and encourage more scientists to deal with this topic.}, language = {en} } @article{SchweigerMultererWietelmannetal.2005, author = {Schweiger, Hans-Georg and Multerer, Michael and Wietelmann, U. and Panitz, J.-C. and Burgemeister, T. and Gores, Heiner Jakob}, title = {NMR Determination of Trace Water in Lithium Salts for Battery Electrolytes}, volume = {152}, journal = {Journal of the Electrochemical Society}, number = {3}, publisher = {IOP Publishing}, address = {Bristol}, issn = {1945-7111}, doi = {https://doi.org/10.1149/1.1859693}, pages = {A622 -- A627}, year = {2005}, language = {en} } @article{SchweigerMultererSchweizerBerberichetal.2005, author = {Schweiger, Hans-Georg and Multerer, Michael and Schweizer-Berberich, M. and Gores, Heiner Jakob}, title = {Finding Conductivity Optima of Battery Electrolytes by Conductivity Measurements Guided by a Simplex Algorithm}, volume = {152}, journal = {Journal of the Electrochemical Society}, number = {3}, publisher = {IOP Publishing}, address = {Bristol}, issn = {1945-7111}, doi = {https://doi.org/10.1149/1.1859711}, pages = {A577 -- A582}, year = {2005}, language = {en} } @article{KochSchweiger2022, author = {Koch, Daniel and Schweiger, Hans-Georg}, title = {Possibilities for a Quick Onsite Safety-State Assessment of Stand-Alone Lithium-Ion Batteries}, volume = {8}, pages = {213}, journal = {Batteries}, number = {11}, publisher = {MDPI}, address = {Basel}, issn = {2313-0105}, doi = {https://doi.org/10.3390/batteries8110213}, year = {2022}, abstract = {Electric vehicles' high-voltage lithium-ion batteries are complex systems and can be sources of several hazards for interacting people. Sophisticated battery management systems (BMS) therefore constantly monitor their characteristics and varying states, to keep the battery within desired operational conditions and to mitigate safety risks as well as excessive degradation. However, there can be several situations where the battery is not in normal operation (e.g., a stand-alone battery) and a fully functional BMS monitoring function is not available. When necessary to interact with the system, its safety state must be deduced to ensure the safety of interactors. This can be a challenging task depending on a situation's characteristics (time pressure, technical knowledge of involved people). Thus, this article discusses how the safety state of electric vehicle batteries can be evaluated quickly even by untrained people. To develop a solution, different scenarios, which require a battery's state assessment, and the options for collecting relevant information are motivated and discussed, respectively. Finally, a mobile interface that can evaluate and display the safety state by using BMS-internal data is described and demonstrated.}, language = {en} } @article{StegerKroghMeegahapolaetal.2022, author = {Steger, Fabian and Krogh, Jonathan and Meegahapola, Lasantha and Schweiger, Hans-Georg}, title = {Calculating Available Charge and Energy of Lithium-Ion Cells Based on OCV and Internal Resistance}, volume = {15}, pages = {7902}, journal = {Energies}, number = {21}, publisher = {MDPI}, address = {Basel}, issn = {1996-1073}, doi = {https://doi.org/10.3390/en15217902}, year = {2022}, abstract = {The design and operation of performant and safe electric vehicles depend on precise knowledge of the behavior of their electrochemical energy storage systems. The performance of the battery management systems often relies on the discrete-time battery models, which can correctly emulate the battery characteristics. Among the available methods, electric circuit-based equations have shown to be especially useful in describing the electrical characteristics of batteries. To overcome the existing drawbacks, such as discrete-time simulations for parameter estimation and the usage of look-up tables, a set of equations has been developed in this study that solely relies on the open-circuit voltage and the internal resistance of a battery. The parameters can be obtained from typical cell datasheets or can be easily extracted via standard measurements. The proposed equations allow for the direct analytical determination of available discharge capacity and the available energy content depending on the discharge current, as well as the Peukert exponent. The fidelity of the proposed system was validated experimentally using 18650 NMC and LFP lithium-ion cells, and the results are in close agreement with the datasheet.}, language = {en} } @inproceedings{StegerNitscheSchweigeretal.2017, author = {Steger, Fabian and Nitsche, Alexander and Schweiger, Hans-Georg and Belski, Iouri}, title = {Hands-on Experiments vs. Computer-based Simulations in Energy Storage Laboratories}, booktitle = {Proceedings of the 45th SEFI Annual Conference 2017 : Education Excellence for Sustainability}, editor = {Quadrado, Jos{\´e} Carlos and Bernardino, Jorge and Rocha, Jo{\~a}o}, publisher = {SEFI (Soci{\´e}t{\´e} Europ{\´e}enne pour la Formation des Ing{\´e}nieurs)}, address = {Br{\"u}ssel}, isbn = {978-989-98875-7-2}, url = {https://www.sefi.be/conference/2017-azores/}, pages = {121 -- 128}, year = {2017}, language = {en} } @inproceedings{PourtoulidouStegerBurgeretal.2019, author = {Pourtoulidou, Despoina and Steger, Fabian and Burger, Uli and G{\"o}llinger, Harald and K{\"o}nig, Ludwig and Obermeier, Erwin and Schweiger, Hans-Georg and Frey, Andreas}, title = {Mission-framed Project-based Learning and Teaching}, booktitle = {Varietas delectat… Complexity is the new normality: SEFI 47th Annual Conference Proceedings}, subtitle = {integrating an Electric Powertrain into a Motor Glider}, editor = {Nagy, Bal{\´a}zs Vince and Murphy, Mike and J{\"a}rvinen, Hannu-Matti and K{\´a}lm{\´a}n, Anik{\´o}}, publisher = {SEFI}, address = {Br{\"u}ssel}, isbn = {978-2-87352-018-2}, doi = {https://www.sefi.be/proceedings/?conference=2019-budapest-isbn-978-2-87352-018-2}, pages = {879 -- 888}, year = {2019}, language = {en} } @inproceedings{StegerArbesmeierNitscheetal.2019, author = {Steger, Fabian and Arbesmeier, Alexander and Nitsche, Alexander and Brade, Katja and Schweiger, Hans-Georg and Belski, Iouri}, title = {Laboratory learning}, booktitle = {Varietas delectat… Complexity is the new normality: SEFI 47th Annual Conference Proceedings}, subtitle = {influence of the perceived laboratory mode on learning outcomes}, editor = {Nagy, Bal{\´a}zs Vince and Murphy, Mike and J{\"a}rvinen, Hannu-Matti and K{\´a}lm{\´a}n, Anik{\´o}}, publisher = {SEFI}, address = {Br{\"u}ssel}, isbn = {978-2-87352-018-2}, doi = {https://www.sefi.be/proceedings/?conference=2019-budapest-isbn-978-2-87352-018-2}, pages = {1897 -- 1907}, year = {2019}, language = {en} } @inproceedings{StegerNitscheMileyetal.2017, author = {Steger, Fabian and Nitsche, Alexander and Miley, Cayler and Schweiger, Hans-Georg and Belski, Iouri}, title = {Laboratory Learning: Hands-on versus Simulated Experiments}, booktitle = {Proceedings of the 28th Annual Conference of the Australasian Association for Engineering Education (AAEE 2017)}, editor = {Huda, Nazmul and Inglis, David and Tse, Nicholas and Town, Graham}, publisher = {Macquarie University}, address = {Sydney}, isbn = {978-0-646-98026-3}, url = {https://researchers.mq.edu.au/en/publications/proceedings-of-the-28th-annual-conference-of-the-australasian-ass}, pages = {940 -- 947}, year = {2017}, abstract = {CONTEXT Many universities and vocational training institutions conduct laboratories as simulated experiments. This is due to the costs and supervision needs to conduct hands-on labs safely. Numerous studies have presented mixed opinions on whether hands-on laboratory work is more conducive to learning than a simulated laboratory. Most of the studies put students from experimental and control groups in significantly different conditions. Therefore, it is hard to reach any definite conclusion regarding the influence of the learning mode onto the learning achievements. PURPOSE This study compares learning outcomes of student laboratory work in an energy storages course conducted in two different modes: first as a practical hands-on exercise and second using computer-based simulations. APPROACH In order to provide reliable insights, this study implements optimized research methodology to avoid any other effect (e.g. learning synchronicity/distance learning/instructions) on the learning outcome rather than the effect of the learning mode itself. The student laboratory experiments were created in a manner that they could be conducted in both modes in the same way and using a single set of instructions. To ensure a comparable group environment for the individual student, the students were arranged into two similar groups based on the student's practical experience. In this crossover study, the groups were taught the same topics by means of interchanging learning modes. RESULTS To evaluate the influence of each mode on student learning, short written tests regarding the previous experiment were conducted at the beginning of the subsequent laboratory session. 102 students have taken part in the study in two years. Overall learning results of hands-on experiments were slightly better than those of simulated laboratories (Cohen's d=0.25), the difference in performance was statistically significant (p<0.02). Through solicited feedback on each laboratory session, in hands-on mode more students expressed they have acquired new insights/comprehensions (76\% vs. 66\%, Cohen's d=0.23, small effect, p<0.07). CONCLUSIONS Following the strategy not to optimize the lessons individually to the learning mode, other influences on the learning outcome, which were usually mixed, were excluded. The students' subjective opinions show advantages of the hands-on mode. Based on the objective data, a weak, but significant outcome to better knowledge acquisition with hands-on laboratory experiments was achieved. This observation is against the trend of the literature in the last years towards better or equal learning with nontraditional labs. Some of the excluded factors might have a stronger influence on student learning than estimated previously. To get a clear view, the authors recommend isolated research.}, language = {en} } @inproceedings{WechBoehmSchweigeretal.2020, author = {Wech, Lothar and B{\"o}hm, Klaus and Schweiger, Hans-Georg and Paula, Daniel}, title = {Event Data Recorder (EDR) for automated vehicles}, booktitle = {SafetyWeek : Die Zukunft der Fahrzeugsicherheit}, subtitle = {Legal certainty and data privacy for all}, doi = {https://www.carhs.de/de/publikationen/product/safetyweek-2020-replay.html}, year = {2020}, language = {en} } @article{LottKotakBarraetal.2021, author = {Lott, Susanne and Kotak, Bhavya and Barra, S{\"o}nke and Schweiger, Hans-Georg}, title = {Nail Penetration of Small Pouch Cells Under Water: Investigation of Hydrofluoric Acid Formation in Dependence of the State of Charge}, volume = {168}, pages = {100505}, journal = {Journal of the Electrochemical Society}, number = {10}, publisher = {IOP Publishing}, address = {Bristol}, issn = {1945-7111}, doi = {https://doi.org/10.1149/1945-7111/ac285b}, year = {2021}, language = {en} } @article{LauschTaklaSchweiger2022, author = {Lausch, Jonas and Takla, Monir and Schweiger, Hans-Georg}, title = {Insight into crush performance comparison of composite profiles and flat plates}, volume = {2022}, pages = {109643}, journal = {Composites Part B: Engineering}, number = {233}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1359-8368}, doi = {https://doi.org/10.1016/j.compositesb.2022.109643}, year = {2022}, language = {en} }