LED汽车前照灯散热结构设计及优化  

Design and Optimization of Heat Dissipation Structure for LED Automobile Headlamp

作　　者：宋颖超 贺敬良[1,2] 何志祝 陈勇 SONG Yingchao;HE Jingliang;HE Zhizhu;CHEN Yong(Beijing Information Science and Technology University, Beijing 100192,China;Collaborative Innovation Center for Electric Vehicles, Beijing 100192,China;China Agricultural University, Beijing 100083,China)

机构地区：[1]北京信息科技大学,北京100192 [2]北京电动车辆协同创新中心,北京100192 [3]中国农业大学,北京100083

出　　处：《机床与液压》2021年第7期74-78,共5页Machine Tool & Hydraulics

基　　金：科技创新服务能力建设-科研基地建设-北京实验室-新能源汽车北京实验室(市级)(科研类)(P XM2018_014224_000011)。

摘　　要：搭建大功率LED前照灯散热系统试验平台,分别用水和液态金属进行温控效果评估试验,研究结果表明液态金属具有更为显著的冷却效果。在蠕动泵转速为100 r/min时,液态金属的对流换热系数是水的1.5倍,其主要原因是液态金属具有较高的热导系数。为进一步优化和提升液态金属散热性能,采用流体力学仿真方法,系统研究流速、流道结构等对LED前照灯温控性能的影响,并提出一种新的冷板流道结构,有效改善了液态金属温控效果,对包括大功率LED灯散热系统在内的其他高热流密度散热系统同样具有参考意义。By setting up a test platform for the cooling system of high-power LED headlamps,the temperature control effect evaluation tests were carried out with water and liquid metal respectively.The research results show that liquid metal has a more significant cooling effect.When the peristaltic pump speed is 100 r/min,the convective heat transfer coefficient of liquid metal is 1.5 times that of water,which is mainly due to the large thermal conductivity of liquid metal.In order to further optimize and improve the heat dissipation performance of liquid metal,the fluid mechanics simulation method was used to systematically study the influence of the flow rate,flow path structure and other factors on the temperature control performance of LED lamps,and a new cold plate runner structure was designed by which the temperature control effect of liquid metal was improved effectively.The research also has reference significance for other high heat flux heat dissipation systems including high power LED lamp cooling system.

关 键 词：LED散热 液态金属 温控实验 仿真分析 

分 类 号：TN312.8[电子电信—物理电子学]