Cell Phone thermal knowledge
Why is mobile phone cooling system becoming more and more important？First, the performance of mobile phone processors soars every year. With the improvement of mobile phone performance, it also inevitably brings the problem of mobile phone heating. Secondly, 5g mobile phones need to add more antennas to receive signals. At the same time, the data transmission of high-speed network also increases the heat of mobile phones。
The internal components of mobile phones are stacked more and more compact, such as mobile phone screen, rear image system and mobile phone battery, which put forward higher requirements for the heat dissipation capacity of mobile phones. From all aspects, the mobile phone equipped with cooling system is the rigid demand of most 5g flagship, which is also the trend of the mobile phone industry.
There are three mainlt cooling ways for cell phone on the market:
1. Heatpipe cooling:
The mobile phone heat pipe cooling system refers to a hollow closed pipe containing liquid. The liquid evaporates and absorbs heat in the evaporation section of the pipeline and becomes a gas. It condenses into a liquid and releases heat in the condensation section of the pipeline.
The advantages of heat pipe cooling are long service life and flexible setting. cooling heatpipe can be placed in any position that needs heat dissipation inside the mobile phone. At the same time, because the technology is relatively mature, the cost is relatively low.
2. Graphene cooling:
Graphene is a kind of material obtained by chemical reaction from graphite material, which enjoys the reputation of "black gold" and so on. Graphene material has high temperature resistance, good thermal conductivity and chemical stability. At present, it is the most cost-effective mobile phone heat dissipation material.
3. Vapor chamber cooling:
The Vapor chamber cooling, also known as vacuum cavity soaking plate cooling technology, is a vacuum cavity with fine structure on the inner wall, which is usually made of copper. When the heat is transferred from the heat source to the VC cavity, the coolant in the cavity begins to produce gasification phenomenon after heating, and the liquid gasifies and absorbs heat. The condensed coolant will return to the heat source in the steam through the microstructure capillary pipe. This process can be repeated continuously.
Vapor chamber is the latest third-generation cooling technology, which can be regarded as the upgrading technology of copper tube liquid cooling. The manufacturing process is relatively complex and the manufacturing cost is high, but its excellent heat dissipation performance makes this cooling technology gradually become the mainstream of the market in the future.
