Abstract: Aiming at the problems of high energy consumption and limited load capacity caused by the heavy weight of traction battery frames, this paper proposes a lightweight design method. Through modal sensitivity analysis, this study achieves a 20% reduction in the frame's self-weight while maintaining its strength and performance, by adjusting the thickness of the main structural components. This lightweight method provides an efficient solution for the lightweight design of new energy commercial vehicles, and is of great significance for enhancing their economic efficiency and market competitiveness.

Key words: new energy commercial vehicles; traction battery frame; sensitivity analysis; lightweight

摘要： 针对新能源商用车动力电池框架重量大导致整车能耗高、载货量受限的问题，文章通 过模态灵敏度分析，在确保结构强度与性能不受损的前提下，提出一种动力电池框架轻量化 方法。该方法在维持电池框架结构性能的基础上，在模态灵敏度分析结论的指导下调整框架 主体结构件的厚度，实现了框架自重降低 20%的目标。该轻量化方法仿真效率高，且不影响 现有生产及装配工艺流程，为新能源商用车的轻量化开发提供了可行的技术方案，对提升新 能源商用车的经济性与竞争力具有重要意义。

关键词: 新能源商用车；动力电池框架；灵敏度分析；轻量化