双面散热汽车IGBT模块热测试方法研究

Study on thermal resistance measurement methodology of double-sided cooling automotive IGBT module

与传统单面散热IGBT模块不同,双面散热汽车IGBT模块同时向正、反两面传导热量,其热测试评估方式需重新考量。本文进行双面散热汽车IGBT模块热测试工装开发与热界面材料选型,同时对比研究模块压装方式,开发出一种适用于双面散热汽车IGBT模块的双界面散热结构热测试方法,可实现单面热阻测试,对比单面与双面热阻值、实测值与仿真值之间的差异,并讨论差异产生原因与修正手段。测试结果表明,该方法具有良好的可重复性与可推广性,可为双面散热汽车IGBT模块的热测试提供参考。

With new packaging structure,the double-sided cooling(DSC)automotive IGBT has two heat dissipation surface,which is different from traditional IGBT module and requires a new way to acquire its thermal resistance.This article develops dual-TIM thermal resistance measurement methodology,including customized test equipment design,ideal TIM selection,pressing force and test method research,successfully achieves single-side thermal resistance measurement of DSC automotive IGBT.The article analyzes the difference between test results and simulation,and delivers correction route.This novel methodology has good repetitive and generality,which provides the reference for thermal resistance measurement of DSC automotive IGBT modules.