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Optimized heat dissipation of energy storage systems / Michael Frauenhofer in ADHESION - ADHESIVES + SEALANTS, Vol. 17, N° 3/2020 (2020)  

[article]  inADHESION - ADHESIVES + SEALANTS > Vol. 17, N° 3/2020 (2020) . - p. 12-17 Titre : Optimized heat dissipation of energy storage systems Type de document : texte imprimé Auteurs : Michael Frauenhofer, Auteur ; Marc Gormanns, Auteur ; Martin Simon, Auteur ; Martin Rütters, Auteur ; Holger Fricke, Auteur Année de publication : 2020 Article en page(s) : p. 12-17 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Batteries électriques Dissipation d'énergie Energie thermique Thermocinétique Véhicules électriques Index. décimale : 668.3 Adhésifs et produits semblables Résumé : The quality of the heat dissipation from batteries towards the outer casinghas a strong impact on the performance and life on an electric vehicle. The heat conduction path between battery module and cooling system is realized in series production electric vehicles by measn of paste-like materials. These so-called gap fillers exhibit high thermal conductivity and specific mechanical properties. The aim of an ongoing BMWi research project is to develop a new generation of gap fillers with improved thermal conductivity and reduced density and to qualify them for use in series production. Note de contenu : - Significance of the gap filler - The OWES research project - Challenge in the formulation of gap fillers - Further development of ceramic fillers - Aluminum based fillers - Carbon based fillers - Carbon-AlOx hybrid based filler - Manufacturing properties - Simulation of squeezing flows - The squeeze flow experiment - Fluid structure interaction simulations - Simulation of the battery assembly process - Industrial use of the simulations - Fig. 1 : Before inserting the cell modules into the compartment floor, a heat-conducting gap filler is inserted - Fig. 2 : Cooperation in the OWES project - Fig. 3 : Influence of the degree of filling on density, thermal conductivity and viscosity on conventional materials (dashed) and improvement materials targeted in the project - Fig. 4 : Comparison of the thermal conductivities when replacing aluminium oxide by adding graphite and corresponding densities of the mixtures - Fig. 5 : The squeeze flow experiment is used to predict the force and the pressure when squeezing gap fillers - Fig. 6 : Simulation of a squeeze flow experiment on the bases of rheological data determined by a fluid structure simulation (FSI) - Fig. 7 : Experiment on the deflection of a metal sheet by the flow of a pink gap filler and comparison with the simulation - Fig. 8 : Comparison of experiment and simulation at component - Fig. 9 : Importance of the simulation of a complete component for industrial production En ligne : https://drive.google.com/file/d/1O6T29vV8_DaIcWyY49xdX5nEZYgs_x86/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34643 [article]

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Structural adhesives with customized fast curing / Claudio di Fratta in ADHESION - ADHESIVES + SEALANTS, Vol. 17, N° 3/2020 (2020)  

[article]  inADHESION - ADHESIVES + SEALANTS > Vol. 17, N° 3/2020 (2020) . - p. 18-23 Titre : Structural adhesives with customized fast curing Type de document : texte imprimé Auteurs : Claudio di Fratta, Auteur ; Marko Zivaljic, Auteur ; Antonio Corsaro, Auteur ; David Hofstetter, Auteur ; Michael Schlumpf, Auteur ; Bernhard Bosshard, Auteur ; Fabien Choffat, Auteur Année de publication : 2020 Article en page(s) : p. 18-23 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Adhésifs dans les automobiles Adhésifs structuraux Assemblages collés Essais de résilience Essais dynamiques Matériaux -- Allègement Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Commercial transportation industry is constantly challenged by increasing production efficiency and reducing costs,while introducing new design solutions based on lightweight materials. Two innovative adhesive technologies, 'Powerflex' and 'Curing by Design', have been developed to maximize the potential offered by modern lightweight design as well as to improve productivity by immediate curing at precisely defined time. Note de contenu : - Features of the 'Powerflex' technology - Combination with 'Curing by Design' technology - Benefits for manufacturers - Fig. 1 : Comparison of DMA between "Powerflex" technology and standard structural adhesive in commercial transportation - Fig. 2 : Cohesive failures of 'Powerflex' adhesive on e-coated steel in 'Thick Adherent Shear Test' (TAST) and but joint tensile tests at 23°C and -40°C - Fig. 3 : Impact tests of T-joints bonded with a standard toughened adhesive and a 'Powerflex' adhesive : the larger area beneath the blue curves indicate a greater toughness and energy absorption - Fig. 4 : Comparison of curing behavior between 'Curing by Design' technology and a standard structural adhesive with same working time - Fig. 5 : Curing by Design' working mechanism (schematically) - Fig. 6 : Application of 'Powerflex' and 'Curing by Design' adhesive for hook arm bonding on a truck chassis - Fig. 7 : Application of 'Powerflex' and Curing by design' adhesive for bus roof bonding - Fig. 8 : Extended design concepts and modular bonding of lightweight bus roof En ligne : https://drive.google.com/file/d/1QSaAxe4XI7dCa_JJVChkAMojQzhOchfC/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34644 [article]

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High-temperature resistant adhesives and coatings / Markus Läpple in ADHESION - ADHESIVES + SEALANTS, Vol. 17, N° 3/2020 (2020)  

[article]  inADHESION - ADHESIVES + SEALANTS > Vol. 17, N° 3/2020 (2020) . - p. 24-29 Titre : High-temperature resistant adhesives and coatings Type de document : texte imprimé Auteurs : Markus Läpple, Auteur ; Dominik Fuhrer, Auteur Année de publication : 2020 Article en page(s) : p. 24-29 Langues : Multilingue (mul) Catégories : Adhésifs dans les automobiles Adhésifs en phase aqueuse Batteries électriques Colles:Adhésifs Hautes températures Moteurs Polymères en émulsion Résistance thermique Revêtements en phase aqueuse Revêtements organiques Silicones Les silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki). Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Heares, a Nolax start-up company, offers newly developed water-based adhesives and coatings that are resistant to extreme temperatures up to 900 °C. The products show good adhesion to fiberglass fabrics, metal or aluminum foil and are easy to apply. Note de contenu : - HEAT PROTECTION IN THE ENGINE AND BATTERY - SILICONE RESIN EMULSION : Chemistry and principle - Simple processing - APPLICATIONS : Heat protection sleeve automotive - Turbocharger cover - Heat and fire protection of the battery cell carrier cover - Structural fire protection - flexible fire and smoke barriers - Table 1 : Comparison of high heat-resistant adhesives - Table 2 : Results of the heat protection sleeve tests according to the Nolax method - Fig. 1 : Cross-linked silicone resin - Fig. 2 : Flexible material composite for heat protection sleeves for exhaust gas control flap in a truck. Here, temperatures of up to 400°C must be withstood over the long term - Fig. 3 : Turbocharger cover in a combustion engine - Fig. 4 : Battery cell carrier cover in a challenging impact test : Impact/explosion of a 4.2 VLi-OH battery, performed at the Center for Solar Energy and Hydrogen Research in Ulm - Fig. 5 : Impact test at the ZSW, Ulm : Test specimen consisting out of fiberglass fabric coated with a combination of reflective and insulating Nolax/Heares products thereafter bonded to an aluminium plate; the impact side shows neither a hole nor a burn through - Fig. 6 : Construction of the test specimen for the impact test - Fig. 7 : Testing of the specimen via the welding torch method (acetylene/oxygen gas mixture, torch nozzle type : 0.5 mm) - Fig. 8 : Fire test according to EN 1634-2019 at the IBS, Linz En ligne : https://drive.google.com/file/d/1refLDZAunpU8_xsdvW7kdN0K23q_yZMT/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34645 [article]

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Techno-economic safety analysis of adhesively bonded structures / Martin Brandtner-Hafner in ADHESION - ADHESIVES + SEALANTS, Vol. 17, N° 3/2020 (2020)  

[article]  inADHESION - ADHESIVES + SEALANTS > Vol. 17, N° 3/2020 (2020) . - p. 30-34 Titre : Techno-economic safety analysis of adhesively bonded structures Type de document : texte imprimé Auteurs : Martin Brandtner-Hafner, Auteur Année de publication : 2020 Article en page(s) : p. 30-34 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Adhésifs structuraux Essais (technologie) Sécurité -- Aspects économiques Index. décimale : 668.3 Adhésifs et produits semblables Résumé : In numerous fields of technology, such as construction, vehicle and aircraft engineering, structural adhesives are a key enabling technology for bonding various types of materials ensuring their structural performance and safety. The selection of the optimal adhesive is crucial for the bonding success in operation, in terms of safety, quality and performance over the entire service life. Note de contenu : - Techno-economical safety analysis - The adhesive safety factor - Quantifying the price for safety - Fig. 1 : Compilation of influences affecting lap-shear test result quality - Fig. 2 : Illustration of technical safety parameters used to compose the adhesive safety factor - Fig. 3 : Presentation of the safety portfolio of the structural adhesives used. Adhesives 1-6 were taken from for compos comparison purposes - Fig. 4 : Compilation of safety parameters for tested structural adhesives En ligne : https://drive.google.com/file/d/17-6Bv8QljvsFkp4PFXC3iBpB4RpxDbqz/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34646 [article]

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Efficient and reliable process for pretreating structural joining surfaces in ADHESION - ADHESIVES + SEALANTS, Vol. 17, N° 3/2020 (2020)  

[article]  inADHESION - ADHESIVES + SEALANTS > Vol. 17, N° 3/2020 (2020) . - p. 36-38 Titre : Efficient and reliable process for pretreating structural joining surfaces Type de document : texte imprimé Année de publication : 2020 Article en page(s) : p. 36-38 Langues : Multilingue (mul) Catégories : Adhésifs dans les automobiles Assemblages collés Surfaces -- Nettoyage Traîtements de surface Traîtements de surface -- Appareils et matériels Index. décimale : 668.3 Adhésifs et produits semblables Résumé : In the automotive industry, more and more assemblies are being bonded in order to save resources and ensure efficient production. However, pretreating the joining surfaces beforehand in a reliable process is an essential step. The 'quattroClean' technology has several advantages over other dry cleaning methods. Note de contenu : - Dry, partial cleaning instread of a wet chemical process - Snow for clean, residue-free surfaces - Robust process with wide operating window - Pretreatment before bonding different plastics - Removing drawing oil before joining - Optimally adapted process - Fig. 1 : The patented technology with two-component ring nozzle for CO2 and jacketed jet of compressed air achieves consistent and uniform cleaning results - even in automated solutions - Fig. 2 : When it comes to selectively cleaning structural joining surfaces, the cold and dry 'quattroClean' process ensures the necessary degree of cleanliness thanks to its robustness and wide operating window - Fig. 3 : The adhesive can be applied directly after cleaning or after an intermediate activation process - Fig. 4 : The systems can be integrated into production lines and interlinked production environments via standardized interfaces. This allows them to be easily connected to higher-level master computers so that they can be subsequently controlled by them En ligne : https://drive.google.com/file/d/1dSYilnIz3glkj_AKRJZzYdqnVxKuxET5/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34647 [article]

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