The communication base station equipment is developing in the direction of light weight, high power and high integration. The heat consumption density of the system is increasing, but the volume is decreasing. The casing of the outdoor base station is generally a die-casting cavity. Due to high reliability requirements, passive heat dissipation is usually used to achieve heat dissipation of the whole machine. At present, the calorific value of this type of equipment has exceeded 30W/L and can reach as high as 35W/L. The calorific value is huge, which brings serious challenges to the heat dissipation of the whole machine.
In the mobile communication network, the heat generation of the base station increases, and the difficulty of temperature control also increases. The power consumption of 5G base stations is 2.5 to 4 times that of 4G base stations, which is mainly generated by AAU and BBU in the process of signal conversion, processing and transmission. Rising power consumption of base stations means increased heat generation.
If the heat dissipation is not timely, the internal ambient temperature of the base station will rise. Once the rated temperature is exceeded, it will seriously affect the stability of the network and the service life of the equipment.
5G base stations are usually installed on iron frames on the roof and high places in the wild. Therefore, reducing the size and weight is very important for the convenience of equipment installation, which will inevitably bring greater challenges to the heat dissipation of 5G base stations. In order to better solve the heat dissipation problem of 5G base stations, it is required to improve the heat transfer efficiency of the base station as much as possible and reduce the heat transfer thermal resistance in a limited space.
In addition to optimizing the heat sink design, using liquid cooling methods, new heat dissipation materials or reasonable chip layout, high thermal conductivity materials with higher thermal conductivity and lower thermal resistance are also required, so that the heat of the heat source can be transferred to the heat dissipation shell more quickly.
Cohetion’s thermal management materials can well solve the reliability and electromagnetic compatibility problems of equipment and devices such as communication base station AAU, RRU and base station cabinets in complex environments. In view of the high thermal conductivity requirements of 5G base stations for thermally conductive materials, Nuofeng mainly recommends other thermally conductive phase change materials such as thermally conductive silicone sheets and thermally conductive silicone grease.