锂离子电池机械滥用复合层模型的构建与验证OA
Construction and validation of composite layer model for lithium-ion battery under mechanical abuse
在新能源汽车碰撞中,锂离子动力电池会出现机械损伤及热失控风险.然而,精细化模型计算耗时过长,使其难以适用于复杂碰撞工况下的内部损伤分析.通过材料试验与仿真分析,建立了均质化模型与精细化模型,并结合球头挤压试验、计算机断层扫描(CT扫描)及拆解试验对模型进行验证.在此基础上,提出一种均质化与精细化相结合的复合层有限元模型,以5%为间隔调整两种模型的占比.结果表明,所有比例的复合层模型计算误差均在4%以内,且计算时间缩短约50%,实现了高精度与高效率的良好平衡.采用15 mm/30 mm圆柱压头(X/Y方向)的加载试验,验证了复合层模型在多工况下的有效性.为电池损伤分析与数值仿真提供了一种新型建模方法.
During new energy vehicle crashes,lithium-ion traction batteries exhibit mechanical dam-age and thermal runaway risks.However,refined models require excessive computational time,ren-dering them impractical for internal damage analysis under complex crash conditions.Through mate-rial testing and simulation,both homogenization and refined models were established and verified via ball-head extrusion tests,CT scanning,and disassembly.By combining both models,a composite layer model was proposed and constructed,with the proportion of the two models adjusted at 5%in-tervals.Results show that the calculation errors of all proportional composite layer models are within 4%,while the computation time is reduced by approximately 50%,achieving a good balance between high accuracy and high efficiency.Loading tests with 15/30 mm cylinder indenters(X/Y directions)verified the effectiveness of the composite layer model under multiple working conditions.This work introduces a novel modeling approach for battery damage analysis and numerical simulation.
应龙;肖商龙;李通;徐建全
福建农林大学机电工程学院,福建 福州 350108福建农林大学机电工程学院,福建 福州 350108福建农林大学机电工程学院,福建 福州 350108福建农林大学机电工程学院,福建 福州 350108
信息技术与安全科学
锂离子电池复合层模型CT扫描机械滥用
lithium-ion batterycomposite layer modelCT scanning analysismechanical abuse
《电源技术》 2026 (3)
470-478,9
福建省自然科学基金项目(2022J01612)
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