PP‐GF‐EPP sandwich structures as housing materials for rechargeable energy storage system of electric vehicles: Investigations into flame retardancy

Abstract

The growing importance of electric mobility has led to an increased demand for safety technologies in the automotive sector, such as the flame retardancy of materials used for electric vehicles. The fire protection of a fully equipped rechargeable energy storage system (REESS), including battery, housing, control electronics, etc., against a fuel fire must be tested according to UNECE Regulation No. 100 Annex 8E -Fire Resistance (UNECE-R100-8E). To pass this fire retardancy requirement, the flame retardancy of the housing materials is of great importance. In this study, the flame retardancy of glass-fiber-reinforced polypropylene (PP-GF) tape laminates containing the flame retardant magnesium hydroxide and different GF amounts, as well as sandwich structures of these PP-GF tape laminates with a polypropylene bead foam (EPP) core, are investigated by a limiting oxygen index test, a UL94 test and a cone calorimeter test. Furthermore, a newly developed approach of a bench-scale fuel fire test which simulates the fire treatment of the UNECE-R100-8E on component level is used.

Recent Advances in Battery Pack Polymer Composites

“…Magnesium hydroxide (MH: Mg(OH) 2 ) is another potential material for flame retardancy in GFRP [87]. It has the ability to reduce the internal temperature of the battery pack when exposed to external fire.…”

Experimental Investigation of Crush Energy Absorption and Strength Properties of Sandwich Plates With Aluminum Facesheet/ Expanded Polypropylene Foam Core

“…They stated that the foam material can be selected according to the need in the automotive part, and the optimum structure can be obtained, and they also emphasized that this material has an important place in automotive weight reduction studies. Apart from these, many studies on foam and sandwich structures with foam core are available in the literature (Höhne, et al, 2022;Volpe, et al, 2019;Nasirzadeh and Sabet, 2014;Wang, et al, 2013).…”

Preparation and characterization of ethylene‐propylene‐diene monomer rubber/metal hydroxide composites by electron beam irradiation

“…[10][11][12] Halogenated flame retardants (HFRs) are being replaced by environmentally friendly alternatives like halogen-free flame retardants (HFFRs), specifically metal hydroxides like aluminum hydroxide (ATH) and magnesium hydroxide (MDH). [13][14][15] While HFFRs have advantages including higher decomposition temperatures and lower smoke production, they require high loading levels (>50%), affecting composite performance. [16][17][18] To tackle these challenges, suitable compatibilizers and cross-linking methods have been employed.…”