关键词: 电池包, 玻璃纤维, 铺覆, 性能检测, 轻量化, 复合材料

Abstract: In order to reduce the weight of the body, the upper cover of the metal battery pack is designed to reduce the weight of the glass fiber composite. According to the technical requirements of the upper cover, the black flame retardant glass fiber checkered cloth prepreg is used for the ply design, and the [(0,90)/(±45)/(0,90)/(±45)/(0,90)]₂ ply is selected as the optimal performance scheme through the test. FiberSIM software is used to lay the upper cover structure of the battery pack, the laying and cutting scheme of cover parts is discussed, the pavement feasibility analysis of (0,90) and (±45) is carried out respectively, and the ply is analyzed according to the completeness index to determine that the cutting scheme is the best solution. The battery pack cover was statically analyzed under bump, emergency braking and left sharp turn conditions, and the maximum displacement value and maximum stress value of the metal and glass fiber battery pack covers were compared respectively, which verified the accuracy of the glass fiber composite layer laying scheme. The strength, stiffness, air tightness, flame retardancy, thermal conductivity and voltage resistance of the actual manufactured products meet the design requirements, and the weight reduction effect is 41.22%, which meets the requirements of lightweight.

Key words: battery pack, fiberglass, paving, performance testing, lightweight, composites