Abstract
The weight lightening of electric vehicles’ power battery box not only improves the vehicles’ mileage but also extends the service life of the power battery, while in practice the design of lightweight shall not sacrifice its strength for safety reason. Herein, three materials including the glass fiber composite, carbon fiber composite, and metal steel are used to develop the same power battery box and their strengths are simulated. The results show that the sheet molding compound (SMC, a kind of glass fiber composite) power battery pack shall be damaged when the loaded extrusion force is increased to 98.2 kN; for the metal power battery pack, a force of 81 kN would make the deformation more than 30%; while for the carbon fiber composite one, it can stand the extrusion test up to 100 kN, and the specific gravity and specific strength are higher than the former two materials under the same design model condition. This study proves the carbon fiber composite has the advantages of high strength and light weight when applied to the power battery box.
Highlights
With the rapid growth of the number of vehicles during the last decade, new energy vehicles are emerging as the generation transportation to alleviate the strong dependence of the automobile industry on fossil oils and to reduce pollutant emissions
Despite the fact that significant progresses have been accomplished in this field, few studies were performed in regard to lightweight materials comparison for power battery packs under extrusion conditions
The lightweight materials of power battery boxes, i.e., glass fiber reinforced plastics (GFRP) composed of thermosetting material sheet molding compound (SMC), carbon fiber reinforced plastics (CFRP), and metal material Q235 steel are chosen as the research objects in this study
Summary
With the rapid growth of the number of vehicles during the last decade, new energy vehicles are emerging as the generation transportation to alleviate the strong dependence of the automobile industry on fossil oils and to reduce pollutant emissions. The pursuit of lightweight power battery box is urgently needed before the substantial scientific advances in batteries, motors, electronic controls, etc.[2]. It is highly probable to find a high-strength, light-weight, and low-cost box material for an electric car power battery.[3] In particular, the lightweight design of power battery box materials needs to reduce the weight, and to fulfill the necessary criteria of vehicle strength and safety. Despite the fact that significant progresses have been accomplished in this field, few studies were performed in regard to lightweight materials comparison for power battery packs under extrusion conditions. The strength of battery packs made of three materials are compared under the same standard operating conditions, and the optimal option for lightweight power battery packs is thereafter obtained
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