电动汽车尼桑聆风与本田雅阁动力电子热管理系统散热性能分析

Heat Dissipation Performance Analysis of Power Electronic Thermal Management Systems of Electric-drive Vehicle LEAF and Accord

随着电子技术的发展,汽车动力电子系统的热管理策略逐渐发展为以减少系统成本、提高可靠性和热性能为目标。对两种电动汽车的动力电子热管理系统——2012年的尼桑聆风和2014本田雅阁进行研究。以65℃下的水-乙二醇为冷却剂进行实验;在不同冷却剂流量下,对稳态条件下的绝缘栅双极晶体管热阻进行了测量。基于实验测量的结果,对汽车动力电子热管理系统用计算流体力学和有限元分析模型进行建模和分析。结果表明,在稳态条件下,相比尼桑聆风,本田雅阁模组能提供更低的稳态热阻。

Modern thermal management strategies for automotive power electronic systems have evolved over time to reduce system cost and to improve reliability and thermal performance.The power electronic thermal management systems of two electric-drive vehicles-the 2012 Nissan LEAF and 2014 Honda Accord Hybrid were characterized.Tests were conducted to measure the insulated-gate bipolar transistor-tocoolant thermal resistances for steady-state at various coolant flow rates.Water-ethylene glycol at a temperature of 65℃was used as the coolant for these experiments.Computational fluid dynamics and finite element analysis models of the vehicle s power electronics thermal management system were then created and validated using experimentally obtained results.Results indicate that the accord module provides lower steady-state thermal resistance as compared with the LEAF module.