Hu Shi, Wang Dan, Večerník Josef, Křemenáková Dana, Militký Jiří
Department of Material Engineering, Faculty of Textile Engineering, Technical University of Liberec, Studenska, 1402/2, 461 17 Liberec, Czech Republic.
Vecernik s.r.o, Alšovice 54, 468 21 Pěnčín, Czech Republic.
Polymers (Basel). 2024 Aug 14;16(16):2291. doi: 10.3390/polym16162291.
In response to the growing demand for lightweight yet robust materials in electric vehicle (EV) battery casings, this study introduces an advanced carbon fiber-reinforced composite (CFRC). This novel material is engineered to address critical aspects of EV battery casing requirements, including mechanical strength, electromagnetic interference (EMI) shielding, and thermal management. The research strategically combines carbon composite components with copper-plated polyester non-woven fabric (CFRC/Cu) and melamine foam board (CFRC/Me) into a sandwich-structure composite plus a series of composites with graphite particle-integrated matrix resin (CFRC+Gr). Dynamic mechanical analysis (DMA) revealed that the inclusion of copper-plated fabric significantly enhanced the stiffness, and the specific tensile strength of the new composites reached 346.8 MPa/(g/cm), which was higher than that of other metal materials used for EV battery casings. The new developed composites had excellent EMI shielding properties, with the highest shielding effectives of 88.27 dB from 30 MHz to 3 GHz. Furthermore, after integrating the graphite particles, the peak temperature of all composites via Joule heating was increased. The CFRC+Gr/Me reached 68.3 °C under a 5 V DC power supply after 180 s. This research presents a comprehensive and innovative approach that adeptly balances mechanical, electromagnetic, and thermal requirements for EV battery casings.
为响应电动汽车（EV）电池外壳对轻质且坚固材料日益增长的需求，本研究引入了一种先进的碳纤维增强复合材料（CFRC）。这种新型材料旨在满足电动汽车电池外壳要求的关键方面，包括机械强度、电磁干扰（EMI）屏蔽和热管理。该研究策略性地将碳复合材料组件与镀铜聚酯无纺布（CFRC/Cu）和三聚氰胺泡沫板（CFRC/Me）组合成一种三明治结构复合材料，以及一系列含有石墨颗粒的基体树脂的复合材料（CFRC+Gr）。动态力学分析（DMA）表明，镀铜织物的加入显著提高了刚度，新复合材料的比拉伸强度达到346.8 MPa/（g/cm），高于用于电动汽车电池外壳的其他金属材料。新开发的复合材料具有优异的EMI屏蔽性能，在30 MHz至3 GHz范围内的最高屏蔽效能为88.27 dB。此外，在加入石墨颗粒后，所有复合材料通过焦耳加热的峰值温度都有所提高。在5 V直流电源下，180秒后CFRC+Gr/Me达到68.3°C。本研究提出了一种全面且创新的方法，巧妙地平衡了电动汽车电池外壳的机械、电磁和热需求。
