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Study on the heat dissipation performance of phone cases and their impact on the operating temperature of mobile phones

Release Time : 2025-01-02
As smartphones become increasingly powerful, the problem of mobile phone heating has become more prominent. As a "close companion" of mobile phones, the heat dissipation performance of phone cases has attracted much attention.

First of all, the material of phone cases plays a key role in heat dissipation. Common plastic phone cases, such as PC materials, have relatively low thermal conductivity and limited heat dissipation capacity. When the phone is running at high load, such as playing games for a long time and rendering videos, the heat is difficult to dissipate quickly and is easily accumulated inside the phone. In contrast, metal phone cases, such as aluminum alloy materials, have high thermal conductivity and can quickly transfer the heat generated by the phone to the surface of the shell, speeding up the heat dissipation. However, metal shells also have disadvantages, which may cause certain interference to mobile phone signals, and special processing techniques are required to balance heat dissipation and signal reception.

Secondly, the thickness of phone cases is closely related to heat dissipation. Thicker phone cases increase the path length of heat transfer, and it takes longer for heat to dissipate into the air. Experiments show that for phone cases of the same material, for every 1 mm increase in thickness, the temperature of the phone will increase by an average of 2-3℃ after half an hour of high-load operation. Therefore, users who pursue extreme heat dissipation are more inclined to choose thin and light phone cases.

Furthermore, the heat dissipation design details of phone cases cannot be ignored. Some high-end phone cases use heat dissipation fins on the back, similar to the principle of computer CPU radiators, which increases the contact area with the air and takes away more heat when the air flows through. Some phone cases use thermal conductive silicone sheets inside, which fit tightly to the back of the phone to evenly disperse the heat, avoid local overheating, and improve heat dissipation efficiency.

From the perspective of mobile phone operation scenarios, the heat generated by the phone is relatively small during daily use such as browsing social media and browsing the web, and the impact of ordinary phone cases on heat dissipation is not obvious. However, when performing high-load operations such as large-scale games and multitasking, the quality of the heat dissipation performance of phone cases is directly related to the operation stability of the phone. Phone cases with poor heat dissipation will cause the temperature of the phone to rise rapidly, triggering the processor to reduce the frequency, resulting in game jams and slow application responses.

In addition, the external ambient temperature will also amplify the difference in the heat dissipation performance of phone cases. In hot summer, the ambient temperature is high, and phone cases with poor heat dissipation will make it more difficult to dissipate the heat inside the phone, further exacerbating the heating problem; in a cool environment, even if the heat dissipation performance of the phone cases is average, the temperature of the phone can be maintained in a relatively reasonable range.

Through actual testing and long-term monitoring of multiple phone cases, we found that choosing phone cases with good heat dissipation performance can effectively reduce the temperature of the phone when it is running under high load. For example, the temperature of the phone can be reduced by 5-8℃ after playing games for 1 hour, ensuring smooth and stable operation of the phone, extending the service life of the phone, and bringing a better user experience. However, with the continuous development of mobile phone technology, the heat dissipation design of phone cases also needs to continue to innovate to adapt to new heat challenges.
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