At present, most smart phones adopt graphite heat dissipation scheme, and the basic principle is the same, but manufacturers will make some adjustments to their product design. First, let's learn about "graphite". Graphite is an allotrope of elemental carbon, which is stable, so things made of carbon are very common in many industrial applications.
At present, we know that graphite has high temperature resistance, electrical and thermal conductivity, lubricity, chemical stability, plasticity and thermal shock resistance. Using graphite as a part of mobile phone design, we can see many suitable uses. For example, the graphite radiator used in mobile phones now mainly uses the thermal conductivity of graphite.
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Other heat dissipation technologies of smart phones
One: Ice Nest Heat Dissipation Scheme
Ice nest heat dissipation was put forward when OPPO R5 was released. It is improved on the basis of the basic graphite cooling scheme and adopts an exclusive patented ice nest cooling system. In this system, a liquid-like metallic material is added between the chip and graphite, which is usually solid. When the chip heats up, it will absorb heat and turn into liquid, improving heat transfer efficiency.
Two: Micro heat pipe scheme
NEC company put forward the scheme of miniature heat pipe. This heat dissipation scheme adopts flat heat pipe, which has heat dissipation ability, reduces the heat flux density of the heat dissipation surface and reduces the thermal resistance of the heat dissipation path of the chip. This scheme comes from the heat dissipation technology of computers and notebooks. When used in mobile phones, it is necessary to miniaturize the heat pipe, which can be used to dissipate heat for smart phones.
Baidu encyclopedia-graphite radiator