车用双层微通道散热器热性能的优化研究

Optimization Research of Thermal Performance of Double Micro-channel Heat Sink for Pure Electric Vehicle

随着纯电动汽车芯片性能的快速提高,散热不足已成为电子技术发展的瓶颈。当热流密度超过100 W/cm 2,传统空气冷却技术就无法满足散热需求。双层微通道散热器因为具有较大的传热面积与体积比,被认为是改善散热性能的最佳方法之一。论文针对纯电动汽车芯片散热技术问题,采用响应曲面法对双层微通道散热器开展了优化研究。结果表明,优化后有更好的整体散热性能,与原始尺寸的两种双层微通道散热器相比,热阻分别降低4.23%、9.42%。

With the rapid improvement of the performance of pure electric vehicle chips,the lack of heat dissipation has become the bottleneck of the development of electronic technology.When the heat flux density exceeds 100 W/cm 2,the traditional air cooling technology can not meet the heat dissipation demand.The double micro-channel heat sink is considered to be one of the best methods to improve the heat dissipation performance because of its large heat transfer area to volume ratio.In this paper,the optimization of the double micro-channel heat sink is carried out by using the response surface methodology in the field of pure electric vehicle chip heat dissipation.The results show that the optimized double micro-channel heat sink has better overall heat dissipation performance.Compared with the original size of the double micro-channel heat sink,the thermal resistance is reduced by 4.23%and 9.42%respectively.