Graphite Sheet Application on Mobile Phone

Graphite VC application on mobile phone frame

Simulating hotspot area of chip,comparing the heat dissipation of graphite VC and copper VC with the same thickness under the same conditions

1. Test method：

a. Test in a constant temperature and humidity box, temperature 23~25℃, humidity: 30~70%

b. Install a heating sheet in the chip area of the mobile phone frame to simulate the heat generated when the mobile phone is loaded

c. Heating temperature power about 3.5W

d. Use the infrared thermal imager to obtain the position of the heating sheet on the back and the highest temperature of VC;

e. Test time: 30min

2. The infrared imager takes the highest temperature point.

3. Conclusion: At the end of the comparison between graphite VC and copper VC, the temperature difference ∆T 0.2℃, the average temperature effect of graphite VC is slightly better, the temperature rise results show that the heat dissipation of graphite VC is similar to that of copper VC, or even better; At the same time, graphite is more flexible and the use scenario is wider, so the use of graphite VC instead of copper VC for heat dissipation is greater.

Graphite application on mobile phone motherboard chip hot spot

On motherboard chip hot spot area, comparing the heat dissipation of graphite and copper foil with the same thickness under the same conditions.

1. Test method：

a. Test in a constant temperature and humidity box, temperature 23~25℃, humidity: 30~70%

b. Mobile phone OLED, maximum brightness , maximum volume, turn on Bluetooth, Wifi;

c. To do Antutu evaluation on mobile phone - high load operation pressure test, test hand heat dissipation, running and other performance.

d. Infrared thermal imager measurement: the highest temperature of the screen and the hot spot area of the back cover when the mobile phone is running;

e. Two identical mobile phones were respectively loaded with graphite and copper foil samples for synchronous comparison;

f. Test time: 30min.

2. The infrared imager takes the highest temperature point.

3. Temperature rise curve

4. Conclusion:

The screen temperature difference ∆T2.2℃ and the back cover temperature difference ∆T3.1℃. It can be confirmed from the difference result of temperature rise ∆T/℃ that the heat dissipation performance of the graphite sample is better under the same conditions, and the performance of the mobile phone cooled by the graphite sample is improved by about 5% over.