本项目由汽车轻量化技术创新战略联盟推荐，中国汽车工程学会牵头申报并组织实施，组织国内电动汽车生产骨干整车企业、跨产业材料生产企业、高校和科研院所进行联合攻关。将就碳纤维复合材料、铝合金、镁合金、超高强度钢动态性能、典型复杂零部件成形技术、性能评价方法和多材料连接技术进行深入研究；揭示碳纤维复合材料界面与零件结构不同铺层设计导致的各向异性对零部件性能影响的规律性；建立碳纤维复合材料与钢、铝合金、镁合金连接结构的数学模型、连接性能与疲劳失效的数值分析和评价方法；掌握全新架构电动汽车车体和电池仓框架指标分解、结构优化和性能集成方法，构建全新架构电动汽车结构-材料-性能一体化多目标优化设计方法和电动汽车整车和典型零部件轻量化评价方法；建立电动汽车轻量化共性技术数据库，制订电动汽车轻量化技术标准；并实现高强钢与轻合金在2 款车型上应用、碳纤维复合材料在1 款车型上应用；为新一代全新架构电动汽车结构轻量化正向设计开发提供理论与技术基础。项目着眼于推动汽车行业科技进步，实行“共同投入、联合攻关、成果共享”的管理与运行机制，必将进一步推动我国电动汽车轻量化技术的发展和创新能力提高。

The project is recommended by the automobile lightweight technology innovation strategic alliance, and the China Society of automotive engineering takes the lead in reporting and organizing the implementation, and organizes the domestic backbone vehicle enterprises of electric vehicle production, cross industry material production enterprises, universities and scientific research institutes to jointly tackle key problems. The dynamic properties of carbon fiber composites, aluminum alloy, magnesium alloy, ultra-high strength steel, forming technology of typical complex parts, performance evaluation method and multi-material connection technology will be deeply studied; It reveals the regularity of the influence of anisotropy caused by different ply design of carbon fiber composite interface and part structure on the performance of parts; The mathematical model of the connection structure between carbon fiber composites and steel, aluminum alloy and magnesium alloy, and the numerical analysis and evaluation method of connection performance and fatigue failure are established; Master the index decomposition, structure optimization and performance integration methods of the new structure electric vehicle body and battery compartment frame, and build the multi-objective optimization design method of the new structure electric vehicle structure material performance integration and the lightweight evaluation method of the whole electric vehicle and typical parts; Establish the common technology database of electric vehicle lightweight and formulate the technical standards of electric vehicle lightweight; And realize the application of high-strength steel and light alloy in two models and carbon fiber composite in one model; It provides a theoretical and technical basis for the forward design and development of lightweight structure of new generation electric vehicle. The project focuses on promoting the scientific and technological progress of the automobile industry, and implements the management and operation mechanism of "joint investment, joint research and achievement sharing", which will further promote the development and innovation ability of electric vehicle lightweight technology in China.