复合材料电池箱体RTM成型工艺仿真及孔隙缺陷分析

doi:10.19936/j.cnki.2096-8000.20260128.013

复合材料科学与工程 ›› 2026, Vol. 0 ›› Issue (1): 92-101.DOI: 10.19936/j.cnki.2096-8000.20260128.013

复合材料电池箱体RTM成型工艺仿真及孔隙缺陷分析

张赛¹, 邹文涛², 宋通¹, 程从前², 曹铁山², 吴晓重¹, 孟宪明^1*, 赵杰^2*

1.中国汽车技术研究中心有限公司,天津 300300;
2.大连理工大学材料科学与工程学院,大连 116024

收稿日期:2024-11-04 出版日期:2026-01-28 发布日期:2026-03-12
通讯作者: 孟宪明(1980—),男,博士,正高级工程师,博士生导师,研究方向为汽车轻量化,mengxianming@catarc.ac.cn。赵杰(1964—),男,博士,教授,博士生导师,研究方向为材料强度、汽车轻量化,jiezhao@dlut.edu.cn。
作者简介:张赛(1989—),女,博士,高级工程师,主要从事汽车轻量化方面的研究。
基金资助:
政府间国际科技创新合作重点专项项目(2019YFE0124100)

Simulation of RTM molding process and analysis of void defect in composite battery case

ZHANG Sai¹, ZOU Wentao², SONG Tong¹, CHENG Congqian², CAO Tieshan², WU Xiaozhong¹, MENG Xianming^1*, ZHAO Jie^2*

1. China Automotive Technology and Research Center Co., Ltd., Tianjin 300300, China;
2. School of Material Science and Engineering, Dalian University of Technology, Dalian 116024, China

Received:2024-11-04 Online:2026-01-28 Published:2026-03-12

摘要/Abstract

摘要： 针对复合材料电池包下箱体的树脂传递模塑(Resin Transfer Molding,RTM)成型进行了方案设计,基于PAM-RTM软件对其充模过程进行仿真分析及孔隙缺陷预测。首先,对比了两种方案在三种出胶口状态下充模时间,分析了注胶压力及树脂黏度对RTM成型时间的影响规律;其次,分析了充模过程中注胶口附近位置的压力变化情况;最后,预测了宏观/微观两种尺度孔隙缺陷在构件中分布及注胶压力对孔隙含量的影响规律,并结合流速优化理论控制树脂前沿流速以降低孔隙含量。结果表明,模腔内注胶与出胶口压力差越大,成型用时越少,且受到注胶位置影响。注胶压力与充模时间呈线性关系,压力越低,充模时间缩短效果越明显,且黏度越大,充模时间越长。孔隙含量与前沿流速有关,注胶压力越大导致流速越快,宏观孔隙随之减少,微观孔隙相应增多;且流速优化方式注胶能够显著降低总体孔隙率水平,但会延长成型周期。

关键词: 电池包下箱体, 树脂传递模塑, 仿真模拟, 孔隙缺陷, 流速优化, 复合材料

Abstract: The resin transfer molding (RTM) of the lower case of composite battery pack was designed, and simulation analysis of mold filling process and prediction of void defects based on PAM-RTM software. Firstly, the difference of mold filling time between two schemes in three kinds of outlet states was compared, and the influence of injection pressure and resin viscosity on RTM molding time was analyzed; secondly, the pressure change of the position near the injection port during the mold filling process was analyzed; finally, the distribution of macro/micro scale void defects in the components and the influence of injection pressure on void content were predicted, and the flow rate optimization theory was combined to control the resin. The results show that the injection pressure in the mold cavity can reduce the void content. The results show that the larger the pressure difference between the injection and discharge ports in the mold cavity, the lower the molding time, and it is affected by the injection position. There is a linear relationship between injection pressure and mold filling time, the lower the pressure, the more obvious the effect of shortening the mold filling time and the greater the viscosity of the longer the mold filling time. The void content is related to the front flow rate, the higher the injection pressure leads to the faster flow rate, the macro void formation decreases, and the micro void increases; and the flow rate optimization method of injection can significantly reduce the overall porosity level, but prolongs the molding cycle time.

Key words: lower case of battery pack, resin transfer molding (RTM), numerical simulation, void defect, flow rate optimization, composites

中图分类号:

TB332

张赛, 邹文涛, 宋通, 程从前, 曹铁山, 吴晓重, 孟宪明, 赵杰. 复合材料电池箱体RTM成型工艺仿真及孔隙缺陷分析[J]. 复合材料科学与工程, 2026, 0(1): 92-101.

ZHANG Sai, ZOU Wentao, SONG Tong, CHENG Congqian, CAO Tieshan, WU Xiaozhong, MENG Xianming, ZHAO Jie. Simulation of RTM molding process and analysis of void defect in composite battery case[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(1): 92-101.

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复合材料电池箱体RTM成型工艺仿真及孔隙缺陷分析

Simulation of RTM molding process and analysis of void defect in composite battery case

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