Q: 'What digital accessories are the hottest this year?' Xiaobian A: 'Of course it is a wireless charger!'
Yes, after Apple introduced a mobile phone with wireless charging function, it can be said that it has brought a wave of rhythm to the wireless charging industry. Domestic major mobile phone manufacturers have followed suit, there have been Xiaomi MIX 2S, Huawei mateRS, nut R1 When the mobile phone joins the wireless charging function, the number of mobile phone manufacturers joining the wireless charging alliance is countless. The entire wireless charging market has developed very rapidly, and the prospects are also very good.
Ask again: 'Why is Apple AirPower not listed yet?' Xiaobian A: 'Of course it is a heat problem!'
As can be seen from the picture at Apple’s press conference last year, AirPower is a wireless charger that can charge three devices at the same time. However, this multi-coil wireless charger does not have active cooling. If you charge multiple devices at the same time, counting the conversion efficiency of each device, fever is a very headache. This is also the main reason why AirPower has not been listed for three months.
Nowadays, there are not many wireless chargers that support the iPhone 8/8 Plus wireless fast charging in the market, but there are only a handful of wireless charging devices that can keep the mobile phone for a long time. The fever problem is also the difficulty in achieving wireless fast charging.
Today, Xiaobian wants to discuss with you the effect of wireless charger cooling on wireless charging power and mobile phone charging time.
Xiaobian has found three wireless chargers, Mophie, Belkin and Smacat.
Among them, Mophie and Belkin are Apple's authorized accessory manufacturers. The aura is inherently expensive, and the price is naturally expensive. Digital Cat is a component manufacturer that has been deeply cultivating wireless chargers for many years. Based on years of experience in the wireless charger industry, Its research and development strength can not be underestimated, and it has the strength to challenge international brands.
Then why does Xiaobian choose the digital cat brand for comparison? This is going to return to the heat problem mentioned above. The digital cat's wireless charger's cow X is built with an active cooling fan.
What's more worth mentioning is that the active cooling of digital cats is very different from the common wireless charger cooling principle. Through special air channel design, mobile phones and wireless chargers can be used to dissipate heat at the same time, and in China, Japan, USA, The EU has applied for invention patents.
The common way of cooling is to simply dissipate heat from the charger circuit, and the heat dissipation on the phone is not good.
I think everyone knows that in the digital technology industry (especially 3C products), there is a saying in the DC: low-end players look at the configuration, high-end players look at the heat. Of course, this is not to say that the configuration is not important, it is only the importance of communicating heat.
A digital product, if it's well cooled, it will perform better.
For example, when the wireless charger charges the mobile phone, if the heat exceeds the critical value, it will reduce the output power and affect the charging speed. If the heat dissipation function is provided, the temperature can be maintained at the critical value for a longer time, so that Reduce the output power, the charging speed is naturally improved.
There are several cooling air channels on the front of the digital cat wireless charger.
The three wireless chargers tested this time are products that claim to support Apple's 7.5W wireless fast charge. In addition to the difference in appearance, the biggest difference is whether there is active cooling. Then these three wireless The specific performance of the charger is better or worse? Let's look at the small series to give you specific comparison test.
The testing tools mainly include ChargerLAb POWER-Z aging frame, ChargerLAB POWER-Z KM001, multi-channel temperature tester, incubator and other equipment.
First, confirm whether the three wireless chargers support Apple 7.5W. The test tool used is the ChargerLAb POWER-Z aging rack.
This is a wireless charger aging frame with 5W, 7.5W, 10W aging mode. The test uses 7.5W mode. If the 7.5W wireless fast charge buzzer will sound, the display power will be above 6W.
First of all, look at the Mophie wireless charging. After the aging rack is put on, quickly activate the 7.5W fast charging mode, the display voltage is 6.15V, the current is 1.04A, and the power is about 6.4W.
The second model is the Belkin wireless charger, which also activates the 7.5W fast charge. The display voltage is 6.16V, the current is 1.04A, and the power is about 6.4W.
The third digital cat wireless charger successfully activated Apple's 7.5W fast charging mode. The aging frame display voltage is 6.22V, the current is 1.05A, and the power is about 6.5W.
Then Xiaobian put three wireless chargers and three iPhone Xs into the incubator at 28 degrees Celsius, through ChargerLAB POWER-Z KM001 and multi-channel temperature tester and thermal inductor (posted on the left and right sides of the back of iPhone X) ) Power monitoring, temperature monitoring, and monitoring test data are as follows:
When the Belkin wireless charger is charged to iPhone X, the charging voltage and current curves recorded by POWER-Z KM001.
When the Mophie wireless charger is charged to iPhone X, the charging voltage and current curves recorded by POWER-Z KM001.
When the Smacat wireless charger is charged to iPhone X, the charging voltage current curve recorded by POWER-Z KM001.
As can be seen from the above picture, in the first 27 minutes or so, the three wireless chargers charge almost the same amount of power on the iPhone X. After 27 minutes, the difference begins. This is because the digital cat wireless charging has obvious heat dissipation effect, so the iPhone is made. X is in a smooth and fast state of charge for a longer period of time.
Compared with Belkin and Mophie, the advantages of fast charging and normal charging are obvious.
Finally, the iPhone X on the Smacat wireless charger is full in about 3 hours and 45 minutes, more than an hour longer than the other two iPhone Xs.
In terms of temperature control, about the first hour and 40 minutes, the three wireless charging iPhone X temperatures are similar, the highest is maintained at around 40 °C, the difference is not big, but it can be seen that Smacat has a slight advantage.
Later, as the power of the Smacat wireless charger dropped, the iPhone X on it began to cool down, dropping to 36 °C in about 2 hours and 22 minutes, followed by two warming and cooling, after the iPhone X was fully charged, the iPhone X temperature Dropped to 30 ° C, while the iPhone X temperature on the other two wireless chargers is 35 ° C.
to sum up
1. In terms of design, Mophie and Belkin all adopt a flat design, which is light and easy to carry, while Smacat adopts a detachable vertical design of the base, which is also convenient to carry, and the vertical wireless charger is used in some office occasions. (If you need to watch the phone while working) and entertainment (such as watching TV) is more advantageous.
2, In terms of actual charging test, all three products support Apple's 7.5W fast charging mode. The mobile phone is ready to charge, high sensitivity, and the actual experience is very good.
Smacat has a built-in active cooling fan, which controls the temperature during charging, especially in the first hour and 40 minutes before charging. The high-power charging lasts for so long, and the temperature is always controlled at around 40 °C. However, when the output power is subsequently reduced, the temperature drops rapidly, and the cooling fan is indispensable. The temperature advantage is obvious, and the charging speed of the mobile phone is also significantly improved.
In this actual test, when charging iPhone X, Smacat's overall charging time is at least an hour faster than Mophie, Belkin.
