关键词: HP-RTM；连续纤维；电池包上盖

Abstract: Lightweight technology can effectively improve the range and driving performance of new energy vehicles, and has been widely applied in the production and manufacturing of automobiles. Compared with traditional metal materials, fiber composite materials have advantages such as specific strength and stiffness, low thermal expansion coefficient, and good fatigue resistance, ushering in a new era of lightweight. This paper takes the battery pack (the core component of new energy vehicles) as the research object. Based on the high pressure resin transfer molding (HP-RTM) process, the upper cover of the battery pack is lightweight designed using carbon fiber composite materials and glass fiber composite materials. A lightweight mass production plan for the battery pack cover is completed through technical means such as structural optimization, process optimization, and connection method optimization. The test results of the battery package prototype show that the upper cover of the battery pack made of carbon fiber composite material and glass fiber composite material can effectively improve the strength, stiffness, and fatigue resistance of the battery pack structure, with a comprehensive weight reduction of over 50%. The lightweight design scheme of continuous fiber composite materials described in this article can also provide guidance for the design of other automotive components.

Key words: HP-RTM; Continuous fiber composite; Battery package upper cover