| 倪炀,李刚,曾岩.基于等效接触的电池包碰撞高效高保真建模方法[J].计算力学学报,2025,42(5):737~743,794 |
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| 基于等效接触的电池包碰撞高效高保真建模方法 |
| Efficient and high fidelity modeling method for battery pack collision with equivalent contact |
| 投稿时间：2024-06-06 修订日期：2024-10-08 |
| DOI：10.7511/jslx20240606001 |
| 中文关键词: 动力电池包 混合降阶简化模型 质心模组结构模型 底部碰撞 |
| 英文关键词:power battery pack hybrid reduced order simplified model centroid module structural model bottom collision |
| 基金项目:国家自然科学基金(12372119;12302146)资助项目. |
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| 中文摘要: |
| 新能源汽车动力电池包是一个复杂的系统,其高效高保真建模是研究碰撞问题的迫切需要。本文建立了动力电池包的混合降阶电池包模型,即中心区域精细建模,基于集中质量法以质心替代其他部位,采用简单连接-接触方法完成建模;与精细全模型相比,最大应力误差相对较小,计算效率提高约3.5倍。通过进一步考虑边界接触的影响,提出了基于等效接触的质心模组结构模型。相比混合降阶模型,质心模组结构模型的碰撞位移和最大应力更接近精细全模型。最后,针对质心模组结构模型进行了冲击响应分析,并对比精细全模型碰撞中心点及冲击物的行为,结果表明两种模型响应曲线趋势一致,且误差较小,进一步验证了模型的可行性。 |
| 英文摘要: |
| The power battery pack of an electric vehicle is a complex system,whose efficient and high fidelity modeling is an urgent need for solving collision problems.This paper firstly proposes a hybrid reduced order battery pack model,with fine modeling in the central region and centralized mass in other parts through a simple connection contact.Compared with the refined full model,the maximum stress error is relatively small,and the computational efficiency is improved by about 3.5 times.Then,to consider the effect of the boundary further,a centroid module structural model with equivalent contact is proposed.Compared with the hybrid reduced order model,the collision displacement and the maximum stress of the centroid module structure model are much closer to those of the fine full model.Finally,an impact response analysis is conducted on the centroid module structural model and the fine full model,by comparing the behaviors of the collision center point and the impact object.It is found that both models have the similar trend in the response curves with small errors,which verifies the feasibility of the proposed model. |
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