Polypropylene beats aluminum / Harri Dittmar in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 2 (02/2020)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 110, N° 2 (02/2020) . - p. 16-19 Titre : Polypropylene beats aluminum : Underbody protection for batteries in electric vehicles Type de document : texte imprimé Auteurs : Harri Dittmar, Auteur Année de publication : 2020 Article en page(s) : p. 16-19 Langues : Anglais (eng) Catégories : Bandes composites Batteries électriques Composites à fibres de verre Fibres à orientation unidirectionnelle Incendies -- Prévention Matières plastiques dans les automobiles Polypropylène Résistance thermique Véhicules électriques Index. décimale : 668.4 Plastiques, vinyles Résumé : Batteries in electric vehicles must be specially protected to counter the risk of fires. Battery trays made from aluminum frequently offer insufficient protection. The automotive supplier ElringKlinger has therefore developed underbody protection manufactured from glass fiber-reinforced PP. Note de contenu : - Sandwich structure with UD tapes - Underbody also protects against fire - Material reduces energy requirement - Figure : To be suitable for the underbody protection of electric vehicles, a material must first pass a bollart test - Fig. 1 : UD tapes made from PP with a high glass fiber content had much higher values than the other materials tested - Fig. 2 : Deflection under load (180 mm diameter, 100 kg. 84 J) : in contrast to aluminum, the PP sandwich structure transfers the energy fully elastically - Fig. 3 : After three repetitions of the bollard test, the aluminum sheet had significantly deformed by 12.2 mm, whereas the ElroSafe sheet was undamaged - Fig. 4 : The material must withstand temperatures of up to 800°C in the five test. This ensures that the battery does not catch fire - Fig. 5 : Temperature curves in the fire test : the temperatures measured on the aluminum frame are initially far higher than those measured on the ElroSafe sheet - Table 1 : Results of the bollard test on UD tapes with different glass fiber contents and an aluminum sheet En ligne : https://drive.google.com/file/d/13CwXrHuDMU8qKnbwQuDS9jspcHlANKuJ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33975 [article]

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