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 look at something like graphite. Graphite is an allotrope of elemental carbon, which is stable, so it is 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. As a part of mobile phone design, we can see many uses of graphite. For example, graphite heat sinks currently used in mobile phones make use of the thermal conductivity of graphite.
2. The external heat dissipation method of the mobile phone is as follows:
The mobile phone case is made of n kinds of materials, which is the first choice for better heat dissipation.
(1) heat dissipation metal shell.
(2) Metal+plastic heat dissipation.
(3) There are three kinds of plastic hard shells, and the heat dissipation principle is very simple. The above materials have faster heat transfer, wider heat dissipation area and naturally higher heat dissipation speed.
Extended data:
Other cooling technologies of smart phones;
1, ice nest cooling scheme
Ice nest heat dissipation was put forward when OPPOR5 was released. On the basis of the basic graphite cooling scheme, an exclusive patented ice nest cooling system is adopted. In this system, liquid metal material, usually solid, is added between the chip and graphite. When the chip heats up, the absorbed heat becomes liquid, which improves the heat transfer efficiency.
2. Micro heat pipe scheme
NEC company proposed a miniature heat pipe. The cooling scheme adopts flat heat pipe, which has heat dissipation ability, reduces the heat flux density of the cooling surface and reduces the thermal resistance of the chip cooling path. This scheme comes from the heat dissipation technology of computers and notebook computers. For mobile phones, heat pipes need to be miniaturized. The miniaturized heat pipe can be used for cooling smart phones.